168results about How to "Friendly production environment" patented technology

The invention discloses an efficient purification method for quartz sand. In the method, two-section smashing (rough smashing and fine smashing) and ore milling with a rod mill are adopted, so that the production capacity is increased greatly, unit energy consumption is lowered, and the method is suitable for large-scale production. A method for removing weakly-magnetic minerals and intergrowth quartz with high iron content from quartz sand through advanced ore washing and weakly magnetic-high gradient strongly magnetic combined magnetic separation before ore milling is adopted, so that the purity of quartz sand is increased greatly. The method has the advantages of simple process flow, easiness for operating, low cost, high purification efficiency, stable performance and environmental friendliness of a produced product, no use of any chemical substance in an entire production process, no production of any waste water, waste residues and waste gas, true realization of zero emission, no production of waste and prevention of pollution. The method is not limited by the production scale, various quartz sand products of low, medium and high grades can be produced, the enterprise profit can be maximized, and the method has a wide application prospect on the aspect of purification of quartz sand.

Synthesis of taurine is carried out by: reducing esterified product of cholamine with ammonium sulfite as reducer, separating to generate crude product, and re-crystallizing to obtain final product. It's economical, has no SO2 gas discharge and has friendly production environment and can separate out taurine and sulfate at low temperature.

The invention relates to a preparation method of a polyelectrolyte self-assembled composite nonafiltration membrane based on coordination. The preparation method comprises the following steps of: respectively preparing a polyanion electrolyte solution containing transition metal ions and a polycation electrolyte solution easy to form a complex together with the transition metal ions; enabling the polyanion electrolyte solution or the polycation electrolyte solution to flow through the surface of a base membrane in a cross flow way at the pressure of 0-0.5MPa, and self-assembling on the surface of the base membrane to form a polyelectrolyte lamellar membrane; washing surplus polyelectrolyte solution on the surface of the membrane by water; enabling the polyion electrolyte solution with charges opposite to the charges of the upper-layer polyion electrolyte solution to flow through the surface of the base membrane in a cross flow way, and enabling polycation electrolyte and polyanion electrolyte to undergo self-assembled reaction on the surface of the membrane through the coordination of the metal ions to form a polyelectrolyte composite membrane; washing surplus polyelectrolyte solution on the surface of the membrane by using water; and repeating the operations to enable polyelectrolyte with opposite charges to be alternatively deposited and assembled on the surface of the base membrane to obtain the polyelectrolyte self-assembled composite nonafiltration membrane. A cross flow flowing way is adopted in the method, and thus, the phenomenon that gel is easy to form in a dead-end filtration way is avoided, and a product is high in stability, strong in impact resistance and swelling resistance, simple in process, low in preparation cost and friendly to production environment...

The invention discloses a clean production process for a polyurethane synthetic leather base with ultramicro leather powder as a filling material. The process comprises the following steps: introducing air and water-based finishing slurry blended with ultramicro leather powder into a mixer according to a certain proportion and allowing a high-quality micro-foaming finishing agent to be formed under high-speed dispersion action of a stirring head; and coating the micro-foaming finishing agent and then drying and curing the micro-foaming finishing agent so as to prepare the synthetic leather base. The method provided by the invention has the advantages of simple preparation, easy control and the like, eliminates pollution of dimethyl formamide (DMF) produced in a wet production method for synthetic leather and reduces pollution of the industry of synthetic leather; and introduction of the natural ultramicro leather powder enables moisture and air permeability of polyurethane synthetic leather to be improved.

The invention relates to fluoride-free low-acid zwitterion quartz sand reverse flotation process, which is characterized by comprising following steps: (1) pretreatment; (2) flotation: adjusting the pH (potential of hydrogen) value of ore pulp to 4-5 by sulfuric acid, performing air agitation, adding 40g / t-80g / t of positive ion collecting agent and 60g / t-75g / t of foaming agent, stirring and removing foams in primary flotation; and adjusting the pH value of the ore pulp to 9-10 by 200g / t-300g / t of sodium carbonate, performing air agitation, adding 80g / t-150g / t of negative ion collecting agent,then adding 60g / t-75g / t of foaming agent, stirring and removing foams in secondary floatation; and (3) washing ores in a flotation tank by water until the ores are neutral, and drying the ores to obtain quartz sand concentrates. The flotation collecting agents are fine in selectivity, the process is simple, cost is low, the purity of the quartz sand is high, the content of iron and aluminum impurities is low, and the problem that traditional fluoride and high-acid process damages equipment and environments is avoided in a flotation process.

The invention provides a starch coating material and application thereof in coated sustained / controlled release fertilizers. The coating material comprises starch, cellulose, humic acid and a crosslinking agent, wherein the starch accounts for 90.0-95.0% of the coating material by mass; the cellulose accounts for 0-10.0% (except 0) of the coating material by mass; the humic acid accounts for 0-10.0% (except 0) of the coating material by mass; and the crosslinking agent accounts for 0.2-5.0% of the coating material by mass. The starch coating material is used as the coating of the coated sustained / controlled release fertilizers and the coating accounts for 2-30% of the coated sustained / controlled release fertilizers by mass. The coating material has good coating forming property and water resistance and is degradable. Production and application of the material are environment-friendly. The sustained / controlled release fertilizers in different release periods can be prepared by adjusting the proportion of the components of the coating material to the coating material to the granular fertilizers. When the sustained / controlled release fertilizers are prepared by the invention, the used raw materials have wide sources and are cheap and easy to obtain. The preparation method is simple and prone to industrial production.

The invention discloses an early-strength polycarboxylate water reducing agent for a component and a preparation method for the early-strength polycarboxylate water reducing agent, and belongs to the field of water reducing agent preparation. The water reducing agent is formed by polymerization of the following ingredients in percentage by weight: 80-85% of methyl alkene butyl polyoxyethylene polypropylene oxide monomer with the molecular weight more than 2400, 10-15% of unsaturated monocarboxylic acid and derivative monomer thereof and 0.5-5% of unsaturated alkenyl sulfoacid and sodium salt thereof; the preparation method comprises the following steps: under the temperature condition of 20-40 DEG C, all ingredients are enabled to be subjected to polymerization reaction in an aqueous solution by adopting a redox initiation system, after polymerization reaction is performed, neutralization is performed through a neutralizing agent, so that the polymer with low air entraining amount and good dispersibility is obtained; the early-strength performance of the polycarboxylate water reducing agent is reinforced with the increasing of the macromonomer molecular weight; the using requirements of early strength or super early strength of the component are met.

The invention relates to a process for recovering zinc from hot-dip coating zinc ash. The process comprises the following steps of: separating the hot-dip coating zinc ash after dry grinding and screening to obtain an oversize product and an undersize product; removing bound water and a small amount of zinc chloride from the oversize product under the condition that the temperature is between 400 and 500 DEG C and the vacuum degree is 10 to 50 Pa; performing vacuum distillation on the oversize product under the condition that the temperature is between 650 and 800 DEG C and the vacuum degree is 10 to 30 Pa to obtain zinc; and performing alkali cleaning on the undersize product to remove chlorine, and then performing vacuum thermal reduction on the undersize product to obtain the zinc from zinc oxide by using ferrosilicon as a reducing agent and calcium oxide as a slagging agent under the condition that the vacuum degree is 10 to 30 Pa and the temperature is between 1,050 and 1,200 DEG C. The process has a high recovery rate for recovering the zinc from the hot-dip coating zinc ash, and the obtained zinc has a good crystallized shape.

The invention relates to a drying method for Chinese medical extract, in particular to a vacuum drying method for Shouhui cathartic extract. The vacuum drying method adopts circulating hot water with the temperature being controlled automatically to serve as a medium for heating of the Chinese medical extract, and the purpose of low-temperature drying of the Chinese medical extract is achieved. Through the method, the defects, occurring to traditional vacuum drying and the like, that thermosensitive components of extract are decomposed due to high temperature, the energy consumption is high, the heat efficiency is low, the extract is dried and burnt, drying is insufficient can be overcome. According to the dried Chinese medical extract obtained through the drying method, the content of effective components is high, the quality of finished products is good, the water content is low, and preparation processing and storage of the finished products are facilitated; fresh scent of medicinal materials is maintained, the color and lustre are natural, the texture is loose and uniform, the extract is easy to crush; and continuous and automatic production can be achieved, and the method has quite high operability and practicability.

The invention belongs to the technical field of textile equipment, and relates to an automatic tube drawing device of a doffer. A main air cylinder component and a reducing motor are connected onto a doffer frame respectively; a bracket for mounting a guiding wheel is fixed on the doffer frame; a gear is meshed with racks fixed on the doffer; a driving shaft is mounted in a bearing pedestal of a driving rocker arm and is supported through a rolling bearing; a front driving rocker arm and a rear driving rocker arm are in key joint with and fixedly mounted onto the driving shaft respectively; a driving rocker arm guiding shaft is fixedly mounted in holes corresponding to the front driving rocker arm and the rear driving rocker arm; a driven rocker arm is supported through a sliding bearing mounted in a driven rocker arm bracket and is mounted on a pin shaft for a driven rocker arm in an interference fit manner; a driven rocker arm guiding shaft is mounted in a hole corresponding to the driven rocker arm; and a connecting rod is mounted on the driving rocker arm guiding shaft and the driven rocker arm guiding shaft, and performs reciprocating motion along the two guiding shafts. The automatic tube drawing device has reliable principle, simple structure, high tube drawing effective rate and friendly production environment, is safe in operation and running, and saves human resources.

The invention relates to a method for preparing poly(p-phenylene terephthalamide) (PPTA) resin. The method comprises the following steps of: (1) introducing inert gas, adding p-phenylenediamine into cosolvent-containing N-methyl pyrrolidone (NMP) to obtain mixed liquid, adding 50 to 85 percent of the total amount of terephthaloyl chloride after the p-phenylenediamine is completely dissolved, and performing pre-polycondensation to obtain prepolymer; and (2) adding the prepolymer and the rest terephthaloyl chloride into a double-screw extruder simultaneously, introducing inert gas, performing final polycondensation reaction, and extruding after the reaction is completely performed; and standing the extruded polymer, washing, dehydrating, and drying. An acid-acceptor is not required to be added during preparation, environment-friendly production is performed, and a few impurities are introduced; and the PPTA resin has small average particle size, large specific surface area, high molecular weight, low ash content and high logarithmic viscosity number, and is easy to clean.

The invention belongs to the technical field of preparation of novel materials and relates to a method for preparing a nano black carbon passivator for repairing heavy metal contaminated soil. The method comprises the following steps of: weighing nano black carbon raw materials and putting the raw materials in a glass container, adding HNO3 and KMnO4, uniformly mixing so as to obtain a mixed oxidant, putting the nano black carbon and the mixed oxidant in a ventilating kitchen, and standing at room temperature so as to obtain the pre-oxidized nano black carbon; heating the pre-oxidized nano black carbon by utilizing a constant temperature water bath kettle, thus obtaining the oxidized nano black carbon; centrifuging the oxidized nano black carbon in a centrifugal machine, and pouring the supernatant; adding distilled water, and repeatedly centrifuging until the pH value of the centrifuged supernatant is more than 5.5, thus obtaining the washed modified nano black carbon; and controlling the temperature of the washed modified nano black carbon to be 105 DEG C, and drying in a dryer, thus obtaining the product. The method is simple in process principle, low in preparation cost, high in product quality, environment-friendly in production, high in economic benefits, wide in product application range and good in a using effect.

The invention discloses a method for recycling valuable metal in a waste circuit board. The method includes the following steps that the waste circuit board is subject to smashing and reselection to prepare multi-metal powder; a dilute acid solution is added into the multi-metal powder, agitation leaching is carried out, filtering is carried out, and leaching slag I and leaching liquid I are obtained; an acid solution is added into the leaching slag I according to the liquid-solid mass ratio of the acid solution to the leaching slag I being 10-40:1, then an oxidizing agent is added, agitation leaching is carried out, filtering is carried out after leaching is finished, and leaching slag II and leaching liquid II are obtained; the leaching liquid II is subject to cyclone electrodeposition to obtain cathode copper and an after-electrolysis solution; alkali and a reducing agent are added into the leaching slag II, smelting is carried out under the condition that the temperature ranges from 400 DEG C to 600 DEG C, water leaching is carried out, filtering is carried out, and lead bullion containing precious metal and leaching liquid III are obtained; and the leaching liquid III is purified and is subject to evaporation and concentration to obtain a concentrated alkali solution and sodium stannate crystals. According to the method for recycling the valuable metal in the waste circuit board, the procedure is short, the efficiency is high, the cost is low, cleanness is achieved, and pollution is avoided.

The invention provides a comprehensive utilization method of granite, and belongs to the technical field of mineral utilization. According to the method, two sections of crushing-screening closed-circuit processes are adopted, and sand manufacturing is achieved by utilizing a vertical impact type crushing machine; black mica is pre-separated by using a strong magnetic roller type magnetic separator; and then black quartz coarse ore, high-potassium feldspar ore and potassium-sodium mixed ore are pre-separated by adopting a color separator, moreover, the separated products are correspondingly subjected to grading and physical method purification, and the obtained final products can meet the requirements of the downstream industry. The whole production process adopts the physical method, no chemical reagents need to be added, moreover, no waste is generated, and green production is really realized. According to the comprehensive utilization method of granite, various valuable components in the granite are fully developed and utilized, the comprehensive utilization rate of resources is improved, the additional value of the products is greatly improved, social benefits and economic benefits are remarkable, and therefore, the method has a wide application prospect in the development and utilization of granite minerals.

The invention relates to a preparation method of an anilinoquinazoIine compound, in particular to a method for preparing gefitinib and an intermediate thereof. The preparation method of the invention not only avoids the use of highly-pollutant halogenating agents to greatly reduce environmental pollution, but is also characterized by the connection with a 3-halogenated propyl side chain at first prior to the synthesis of a quinazoline parent ring and then introduction of a morpholine ring at the last step of the synthesis, thus repeated adjustment for pH value in the purification of a reaction product of every step is avoided, a purification method is simplified and the yield is raised.

The invention discloses a Hong Anzhang seedling growing method. Before cutting, female parents are disinfected, deinsectization is conducted, strong upper branches are taken as cutting slips. The cutting slips are trimmed into the shape with the length of 6-10 cm and the diameter of 0.3-0.5 cm, the bottoms of the cutting slips are cut flatly, more than half of strong leaves are reserved on the tops, and after soaked for a few seconds for disinfection, the cutting slips are quickly wet with paste prepared from rooting powder. Sticky deep-layer red earth is selected; on a cloudy day or in the morning, the cutting slips are subjected to cutting in a 9*11 non-woven fabric seedling growing bag with cuttage soil; after cutting, the Hong Anzhang cutting slips are disinfected again, an arch plastic-coated steel tube is used for arch making, water-absorption thick non-woven fabric strips are additionally arranged, anti-drop film covers the fabric strips for sealing, a sunshelter is constructedoutside the arch, an overshadowing net with the overshadowing rate of 95% covers the sunshelter, and a monopotassium phosphate solution or a leaf fertilizer which contains bactericide and can promoterooting is sprayed every 10 days. The seedling growing method of cutting propagation is adopted for conducting propagation on Hong Anzhang nursery stocks of the superior type and has the advantagesofquick propagation speed, high germchit purity and high survival rate.

The invention relates to a method for preparing potassium fluoride with white carbon black as co-product by using fluorosilicic acid as a raw material. The method comprises the following steps: S1 dissolving potassium chloride and filtering to obtain potassium chloride solution; S2, injecting the potassium chloride solution obtained by S1 into the fluorosilicic acid solution for reaction, and after the reaction is completed, stirring, filtering and washing to obtain the potassium fluorosilicate filter cake; S3, adding water in proportion to the potassium fluosilicate filter cake obtained in the step S2 and stirring into a paste to obtain potassium fluosilicate slurry, and then injecting potassium hydroxide solution into the slurry to carry out reaction; S4, after the reaction is completed,filtering the mixed slurry obtained in the step S3 to obtain a silica filter cake and a filtrate containing potassium fluoride. The invention uses fluorosilicic acid as a raw material to prepare potassium fluoride with white carbon black as co-product, and the by-product potassium chloride and by-product silicofluoric acid from hydrofluoric acid industry are used as main raw materials to preparehigh purity potassium fluoride with high added value white carbon black as co-product. Compared with the raw materials in the neutralization method in which potassium hydroxide and hydrofluoric acid are reacted are used for the longest time at present, the production cost of the method is low.

The invention relates to a soft crystallitic wax combination containing crystallitic wax as the substrate, malthene and tackifier. The soft crystallitic wax combination disclosed in the invention has reduced rigidity and enhanced viscosity, and adjusts the product properties according to needs. Being capable of effectively overcoming the defects of the common crystallitic wax such as weak toughness and easy breakage, etc., the crystallitic wax composite relating to the invention is in particular suitable for the fields of moisture protection, insulation, sealing and gift candles, etc.

The invention discloses a lutein micro-capsule preparation, which adopts lutein as core material, adopts granulesten and sucrose ester as composite emulsifying agent and adopts gelatin and porous starch as composite wall material. The invention further discloses a preparation method id the lutein micro-capsule preparation. The lutein micro-capsule is obviously improved in water-solubility and stability, is high in bioactivity, and has more than 60% clearance rate on OH- and O2.-. Compared with free lutein the lutein micro-capsule can be directly dissolved in water, heat resistance and acid-base resistance are respectively improved by 50%, and illumination and oxygen resistance capability are respectively by 37% and 20%. Under the conditions of 100DEG C high temperature, 70% oxygen, high potential of hydrogen (PH1-PH12) and long-term illumination (reaching 30 days), retention rate of the lutein can still be maintained to more than 90%.

The invention belongs to the technical field of air conditioners, and relates to an efficient and energy-saving temperature-regulating and humidity-regulating air processing method. According to the method, each cycle of four subsystems is filled with cycle medium after pumped out, and the four subsystems include an inside-outside combined-type gas-liquid two-phase flow heat pipe cold quantity recovery subsystem, a multi-stage shunt-wound refrigeration cycle subsystem, an inside-outside combined-type heat-extraction heat pump cycle subsystem and an inside-outside combined-type heat-extraction-free heat pump cycle subsystem; both air-out temperature and dew-point temperature of a central control subsystem are set according to a temperature-regulating and humidity-regulating air processing technology; and all compressors of the multi-stage shunt-wound refrigeration cycle subsystem are started after an induced-draft fan in an air post-processing section is started, and the inside-outside combined-type gas-liquid two-phase flow heat pipe cold quantity recovery subsystem is started, as a result, the air-out temperature and the dew-point temperature of the system reaches the set value, and the stable operation of the system is realized; and accordingly, in such a way, the air meeting the requirement of the air-out temperature and the dew-point temperature can be continuously provided. The system device has the advantages of simple structure, reliable principle, low running cost, good energy saving effect, friendly production environment, and remarkable economic benefit.

The invention belongs to the technical field of equipment manufacture in energy engineering and relates to a preparation device of charcoal with biomass as a raw material. The preparation device belongs to a vertical kiln, which can realize continuous production and has a multi-level chain belt structure. Multilevel fire grates of the preparation device are classified up and down, and pyrolysis gas is introduced to a combustion chamber arranged outside a vertical furnace and is used for firing and releasing heat in a high-temperature environment of gas combustion; and the cascade utilization of heat energy of heat source smoke is realized when the heat source smoke flows by charcoal preparation fuel on each level of heated fire grate, and inhalable particles, tar particles and the like contained in the heat source smoke are filtered by each fuel layer. A tunnel charcoal burner of the vertical furnace has higher thermal efficiency, meets the requirement of environment friendliness, is adjustable in production capacity and can replace small-and-medium-sized periodic-production charcoal burners and large-scale tunnel kilns, thus having good application prospect and environmental benefits; and according to the preparation device, the integral structure is reasonable, the operation and use are simple, the charcoal firing process is scientific, the energy conservation property is good, the quality of fired charcoal is good, the performance is good, and the economic benefits are obvious.

The invention provides a method for preparing an absorbable and antibacterial guided tissue regeneration membrane for a bone-like structure, and belongs to the field of biological medical materials. The method comprises the following steps: firstly, preparing a cell free bovine pericardial collagen fiber membrane by adopting a repeated freeze-thaw method and a surface active agent TritonX-100, or preparing a demineralized cell free collagen fiber membrane of a cattle lamellar bone by using a method of EDTA decalcification by using the surfactant TritonX-100; treating by using sodium trimetaphosphate to obtain a phosphorylated collagen fiber membrane; with the assistance of a direct-current electric field, mineralizing in agar hydrogel containing calcium and phosphate, thereby obtaining a mineralized collagen membrane with a bone-like structure with certain hardness; and finally soaking the mineralized collagen membrane into a minocyline solution, and preparing an antibacterial bone-like structured composite membrane structure by virtue of the characteristics of combined minocyline and hydroxyapatite. The guided tissue regeneration membrane provided by the invention has a bone-like structure, is capable of maintaining a bone defect space, is good in operation forming property and antibacterial property, and can be applied to clinical practice for bone defect remediation and reconstruction in periodontal departments, dental implant mediation and occlusalf surfaces.

The invention relates to a technology for recovering nickel, cobalt and iron from nickel oxide ores through high-temperature chlorinating volatilization. The technology comprises the following steps: A, respectively pulverizing and ball-milling the nickel oxide ores and coke powder; B, uniformly mixing the nickel oxide ores, the coke powder and a chlorinating agent to carry out high-temperature chlorinating volatilization roasting, converting chlorinated nickel, cobalt and iron into gas at a high temperature, filling smoke, and in a recovering device, washing with water, absorbing and dissolving a smoke chloride solution; C, producing an oxyhydrogen mixture product containing nickel, cobalt and iron. The nickel grade of the oxyhydrogen mixture product containing nickel, cobalt and iron, produced by the invention, is high and can be used for producing stainless steel. Compared with the traditional nickel oxide ore wet-process treatment technology, the method for recovering nickel, cobalt and iron from nickel oxide ores belongs to the technology having the advantages of high resource comprehensive utilization rate, low energy consumption, environment friendliness and easiness for implementation.

The invention belongs to the technical field of chemical products and relates to a method for preparing isocyanate by means of atomizing type gas-liquid two-phase phosgenation. The method includes: feeding liquid-phase amine and high-temperature gas-phase phosgene into a reactor, heating to an overheat temperature of 5-50 DEG C before mixing, mixing and reacting to obtain a mixture; quenching the mixture with inert solvent, and entering an atomizing type reactor for reacting to generate isocyanate, wherein liquid amine or mixture solution can be quickly dispersed into liquid drops with the diameter of 0.01-3mm by the reactor, a nozzle of the reactor is in a venture or laval structure, and the liquid-phase amine enters from the nozzle or a lateral annular clearance of the nozzle; and finally the generated isocyanate is subjected to removal of phosgene, HCl and solvent and rectification and purification to obtain the product isocyanate. The process is scientific and reasonable in step and reliable in principle, and equipment is simple in structure, low in manufacturing cost, safe and reliable in operation, high in production efficiency and environment-friendly in production.

The invention belongs to the technical field of processing of marine products, and relates to a preparation method of specially-made sea cucumber powder. The preparation method comprises six steps, including treatment of fresh sea cucumbers, preparation of traditional Chinese medicine components, decoction of yellow wine medicine soup, soaking of the sea cucumbers, freeze-drying of specially-made sea cucumbers and low-temperature crushing: firstly, treating the fresh sea cucumbers for later use, and soaking the sea cucumbers in a deodorizing solution prepared from a ferment solution for deodorization; secondly, weighting, mixing and batching the traditional Chinese medicine components by weight, decocting with yellow wine to form the yellow wine medicine soup, and subsequently putting the deodorized sea cucumbers into the yellow wine medicine soup for special preparation; finally freeze-drying the specially-made sea cucumbers into a dried product, and then crushing the dried product into powder by using a low-temperature crusher to prepare a specially-made sea cucumber powder finished product. The specially-made sea cucumber powder is mixed with warm boiling water for drinking. The preparation method of the specially-made sea cucumber powder is mature in process route, equipment is easy to get, the product is rich in nutrients and remarkable in health care and health maintenance effects, the cost is lowered, effective utilization of resources is guaranteed, the specially-made sea cucumber powder is convenient to eat, and the production is environment-friendly.

The invention relates to a preparation method of (S)-equol, which aims to solve the problem of complex operation in the existing preparation method of (S)-equol. The preparation method comprises the following steps: by using daidzein as the main material, carrying out hydroxy protection, catalytic hydrogenation, dehydration and chiral catalytic reduction to prepare the (S)-equol. The invention has the advantages of cheap and accessible raw materials and low cost, is simple to operate, and is suitable for industrial scale-up production; and the yield is 60-70%. The invention is applicable to the field of synthesis of medicine compounds.

The invention relates to a venlafaxine hydrochloride sustained release capsule. Sustained release pellets serve as contents of the sustained release capsule prepared by the invention, wherein the pellets comprise medicine-containing pill cores and sustained release coatings; the medicine-containing pill cores contain venlafaxine hydrochloride, hydroxypropyl methyl cellulose and microcrystalline cellulose. The venlafaxine hydrochloride sustained release capsule disclosed by the invention is stable to release medicines, free from a problem of organic solvent residue, safe to take and environment-friendly during producing. Furthermore, the invention provides a preparation method of the venlafaxine hydrochloride sustained release capsule. The method is high in production efficiency, simple in process, convenient to operate, low in cost and easy in industrial production; the method can be used for saving the cost for medicine production enterprises, and can bring about considerable economic and social benefits.

The invention belongs to the technical field of health product processing, and particularly relates to a preparation method of tablets containing sea cucumber, cordyceps sinensis and propolis. The method comprises the eight steps of preparing sea cucumber powder, preparing cordyceps sinensis powder, preparing propolis powder, preparing rose powder, preparing fig powder, preparing okra powder, preparing tremella fuciformis and honey juice and molding by tabletting; the method specifically comprises the following steps: firstly, sequentially preparing all raw materials into powder, soaking tremella fuciformis until the tremella fuciformis expand, feeding fresh mushrooms and purified water, cooking and pulping, feeding honey to prepare the tremella fuciformis and honey juice, mixing all the raw materials, slowly feeding the tremella fuciformis and honey juice and the water while mixing, then tabletting, and drying to obtain the product. The tablets containing the sea cucumber, the cordyceps sinensis and the propolis can be drunk or kept in the mouth, the method is mature in process route, equipment are easily available, the product is high in nutritive value, good in health effect, convenient to eat, sanitary and safe, and friendless to production environment is achieved.

The invention relates to a method for recovering nickel, cobalt, manganese and iron by roasting and leaching nickel oxide ore. The method includes: ball milling the nickel oxide ore to obtain mineral powder; then adding mineral powder additives into the mineral powder; balling, roasting and conducting leaching processing on roasted mineral materials through water or diluted hydrochloric acid to obtain leaching agent of the nickel oxide ore; adding oxidant into the leaching agent, processing to obtain sediment of cobalt oxide and manganite, adding calcium oxide or sodium hydroxide into filtrate to conduct processing to obtain mixture sediment containing nickel and iron. The method is reasonable in process design and good in operability and can use mineral resource effectively and achieve large-scale industrial production; achieves recycling of four elements of nickel, cobalt, manganese and iron in leaching agent of the nickel oxide; and saves production cost.

The invention belongs to the technical field of rubber machining, and relates to a method for molding a spiral equal-wall-thickness hollow screw pump stator rubber bushing. The method comprises the following steps of: firstly mounting a screw pump stator, a mandrel and a runner device to a molding device, and placing the screw pump stator, the mandrel and the runner device in a pre-heater to control temperature and pre-heat for 30 minutes; arranging a cold feed extruder, wherein the temperature of a feed section is 50 DEG C, the temperature of an extrusion section is 75 DEG C, the temperature of a machine head section is 85 DEG C and the temperature of a screw is 80 DEG C; drawing and locking an opening mould, a mould tool and the runner device, and starting the molding device to carry out extrusion at 95 DEG C, in 20rpm and under the machine head pressure of 40Mpa; carrying out processes of exhausting, overflowing, pressure-maintaining and vulcanizing to keep compactness of a rubber material; and carrying out an overflow process on a forward material of the rubber material to ensure homogeneity of full length quality, and carrying out vulcanization molding according to preset parameters of a vulcanization process. The method for molding the spiral equal-wall-thickness hollow screw pump stator rubber bushing, disclosed by the invention, has the advantages of being reliable in principle, simple in process, reasonable in production condition, effective for control process, good in product quality and environment for friendliness.