39results about How to "Meet the requirements of clean production" patented technology

The invention relates to a material with humidifying function and a preparation method thereof. An adopted organic-inorganic composite material comprises the following components in percentage by weight: 15 to 18 percent of mica, 70 to 75 percent of silica sol, 3 to 4 percent of kaolin, 1 to 2 percent of montmorillonite, 5 to 8 percent of cross linker and 0.1 to 0.2 percent of dispersant. The preparation method comprises the following steps: ball-milling the components for 12 to 24 hours and mixing the components uniformly, adding the cross linker into the mixture, stirring the mixture for 30 minutes, then molding the mixture according to the required product, and naturally drying the mixture to form the material with the humidifying function. The obtained material has the advantages of obvious moisture absorption effect, stable performance, low raw material cost, simple preparation process, non-toxicity and environmental protection, can reduce or cancel the running time and frequency of an indoor air moisture adjusting device and save the energy, and has good market prospect and popularization and application values.

The invention discloses a preparation method of 2-chloro-5-chloromethylpyridine; with 2-chloro-5-methylpyridine as a raw material, the temperature rises to 80-160 DEG C, chlorine gas is introduced, a chlorination reaction is performed, and 2-chloro-5-chloromethylpyridine is obtained. The preparation process adopts heat chlorination, has no need of ultraviolet light catalysis having high energy consumption, also has no need of expensive catalysts, is friendly to the environment and high in product yield, meets the requirements of cleaning production, and is an effective method for preparing 2-chloro-5-chloromethylpyridine.

The invention discloses a method for synthesizing 4,6-diamino resorcinol dihydrochloride (DAR). The method for generating and producing DAR comprises four links of nitratlon reaction, alcoholysis, reduction and acidification, and the purity of products can meet the synthesis of PBO (poly (p-phenylenebenzobisoxazole) fiber. Compared with the prior art, the invention has the advantages of simpleness of synthesis and high reaction efficiency. A cheap selenium catalyst is adopted in the step with greatest difficulty and highest reaction cost, the selectivity of reaction is as high as 99 percent, and the reaction yield in the step is almost quantified. Crucially, the catalyst can realize multiple circulations by simple filtration. The production of by-products and isomers is reduced in the reaction process, and the purity of a final target compound 4,6-diamino resorcinol reaches 99,9 percent. The method disclosed by the invention has the advantages of simple whole process and low cost, meets the requirement of industrial production and is expected to realize industrialized application.

The invention belongs to a tea processing machine, and in particular relates to a dark tea piling technology. An automatic piling device for dark tea comprises a humid and hot air generator and a frame; the frame is provided with a piling barrel; a rotary shaft with spiral sheets is arranged in the piling barrel; the upper part of the front end of the piling barrel is provided with a tea inlet, and the tail end of the piling barrel is provided with a tea outlet; the rotary shaft is supported on the frame through a bearing; the humid and hot air generator is connected to the piling barrel through a pipe; the rotary shaft is driven by a power device; and door covers are arranged at the tea inlet and the tea outlet. Automatic piling operation is adopted in the device; in the whole piling process, the temperature and the humidity can be monitored and adjusted in real time, and optimal piling conditions of tea leaves can be created; meanwhile, because the device is provided with the spiralsheets for preventing agglomeration, the piling is not limited by external environmental conditions, the piling period is greatly shortened, and meanwhile, the tea has high grade, good quality and pure aroma; and the device meets the requirement of current clean production of tea.

The invention provides a method of comprehensively recovering valuable metals in a lead, zinc and silver-containing material. The method comprises the following steps: grinding the lead, zinc and silver-containing material, proportioning, roasting, leaching with a sulfuric acid solution and filtering, wherein zinc enters a solution I and lead and silver are left in slag; converting phase of the zinc-containing solution I after the zinc-containing solution I is neutralized and de-ironed, filtering the solution to obtain zinc sulfate and a filtrate II, smelting and recovering zinc sulfide, carrying out evaporative crystallization on the filtrate II to obtain sodium sulfate crystals which then enter a proportioning station; leaching the lead and silver-containing slag with a chlorine salt solution, filtering the solution while being hot to obtain a filtrate III; then adding a lead sheet into the filtrate III to replace silver, and filtering the filtrate to obtain coarse silver powder anda filtrate IV; and then converting phase of lead for the filtrate IV, filtering the filtrate IV to obtain lead sulfate and a filtrate V, smelting and recovering lead sulfate, supplementing calcium chloride for the filtrate V and feeding the filtrate V to a chlorine salt leaching station. The recovery rate of zinc is greater than 95%, the recovery rate of lead is greater than 98%, and the recoveryrate of silver is greater than 90%. The method has the advantages of being high in recovery rate, low in energy consumption, being recycled of the solution and the like.

The invention belongs to the field of mechanical equipment, relates to a tea refining device, and in particular to a tea peduncle, stem and leaf separation device. The tea peduncle, stem and leaf separation device comprises a frame, a dust removing device is arranged above the frame, and a circular screening machine is arranged at the bottom of the frame. A vibration screening machine is arranged on one side of the circular screening machine. A flat conveyor is arranged above the circular screening machine. A chopping machine is arranged above the flat conveyor. An inclined conveying lifting machine is arranged on one side of the chopping machine, and a control cabinet is arranged on one side of the frame. The tea peduncle, stem and leaf separation device is small in occupied space, the investment is only one tenth of the investment of an original whole set of refining equipment, the device is easy and convenient to operate, and only one worker can carry out operation. Meanwhile, after being suspended, the chopping machine is installed in a sealed box with the dust removing device, dust is avoided in the production process, and the requirement for the current cleaning production is met.

The invention relates to an aqueous environment-friendly insulation coating of anti-settling electric steel and a preparation method thereof. The insulation coating is formulated from the following components by mass percent: 20-60% of aluminium dihydrogen phosphate, 0.5-5% of silica solution, 1-10% of phosphoric acid, 0.3-2% of nitric acid, 1-5% of magnesium oxide, 0.3-5.5% of rare earth-salt blended solution, 0.5-5.5% of silane coupling agents, 3-20% of anti-settling additives, and the balance of solvent water. In the invention, conventional roller painting technology is adopted for coating and then a film can be made by proper high-temperature solidification. By multiple actions of physical covering, chemical passivation, phosphorization and the like, a surface insulation coating of a cold rolling electric steel plate without orientation has the advantages of good adhesiveness, high insulativity (namely resistance and puncture voltage between high-rises), high corrosion resistance, high temperature resistance and the like, as well as environmental protection without chrome or harmful ions. The insulation coating is widely applicable to the surface coating of the cold rolling electric steel plate without orientation, has a better anti-settling property, better dispersity and a better levelling property, leads coating operation on site to be more convenient and faster, and can effectively avoid the segregation of paint ingredients and the fluctuation of coating performances.

The invention discloses an electromagnetic pure iron part with a transparent water-soluble protective film. The electromagnetic pure iron part comprises an electromagnetic pure iron part body, whereinthe protective film wraps the outer surface of the electromagnetic pure iron part body and is a nano-thickness protective film. The preparation method of the electromagnetic pure iron part comprisesthe following steps: firstly, mixing higher fatty acid, polyol, organic amine, carboxylate and pure water, and uniformly stirring to obtain a protective solution; and secondly, putting the electromagnetic pure iron part body into the protective solution, completely wetting the surface of the electromagnetic pure iron part body, and naturally drying to obtain a finished product. By use of the electromagnetic pure iron part, the contact of a vacuum arc-extinguishing chamber and air is isolated so as to avoid the oxidation phenomenon; and the cleanness of a surface structure of the electromagnetic pure iron part is kept and existing defects on the surface can be observed with naked eyes.

The invention discloses a method for removing aluminum by neutralizing a sodium chromate alkali solution. The sodium chromate alkali solution with the velocity of 6.9m<3> / h-20m<3> / h and the sodium bisulfate clear liquid with the velocity of 1.3m<3> / h-1.7m<3> / h flow to a reaction kettle simultaneously, the pH value of reaction slurry is always between 6.5-8.5, the reaction slurry is insulated and slaked for 1 hour-1.5 hours, a material is discharged, the discharge liquid is filtered and washed through a plate filtration machine, the chromium content measured by referring sodium chromate in filter cake can be reduced to less than 1%. The invention employs the novel method for removing aluminum by neutralizing the sodium chromate alkali solution, under the prerequisite condition that the pH value of sodium chromate neutral slurry is always between 6.5-8.5 and the temperature is controlled at 92-100 DEG C, the flow velocity of the sodium chromate alkali solution and the sodium bisulfate clear liquid can be controlled, so that the sodium chromate content in aluminum hydroxide mud can be reduced to less than 1%, the aluminum hydroxide mud can be directly used for producing aluminum hydroxide or cryolite, the processes of roasting, activating and removing hexavalent chromium are not required to produce the aluminum hydroxide or cryolite.

A method for extracting the vanadium element in vanadium shale through calcinations comprises the following steps that the vanadium containing shale is ground, and blending is carried out according to the mass ratio that the vanadium containing shale to concentrated sulfuric acid to sulfate is 1:(0.1-4):(0.1-4); the ingredients are mixed to be uniform, and calcination is carried out for 0.5 h to 5 h at the temperature of 200 DEG C to 400 DEG C; the calcined materials are subjected to sulfuric acid solution leaching at the temperature of 30 DEG C to 100 DEG C, the concentration of a sulfuric acid solution ranges from 0 wt% to 10 wt%, the leaching time ranges from 0.5 h to 4 h, filtering is carried out, and the vanadium element enters the solution. According to the method, the vanadium element in the vanadium shale can be efficiently extracted, the vanadium leaching rate is larger than 85%, and the beneficial effects of being high in recovery rate, easy and convenient to operate, low in energy consumption and the like are achieved.

The invention relates to a method for producing mineral-based potassium nitrate for agricultural use through rocks rich in potassium. The method comprises the following steps: crushing the rocks rich in the potassium, and milling the rocks after mineral dressing and trash extraction to obtain the powder with the main phase of potash feldspar; mixing the potash feldspar powder and lime according to the mass ratio of 1: 0.80-0.85, adding water according to the solid-liquid mass ratio of 1: 15-25, stirring and mixing the materials for reactions in a reaction kettle, carrying out a hydrothermal reaction on the condition of stirring at a temperature of between 180 and 250 DEG C, carrying out the reaction at constant temperature for 5 to 10 hours to obtain KOH solution and tobermorite; and preparing potassium nitrate through the obtained KOH solution, compounding the potassium nitrate with the tobermorite, and adding a binder for granulation and forming so as to obtain the novel mineral-based potassium nitrate for agricultural use. The KNO3 nutrient content can be adjusted in the range of between 22.0 and 58.6 percent.

The present invention provides an amino retanning and fatliquoring agent and a preparation method thereof. The amino retanning and fatliquoring agent of the present invention uses Guerbet alcohol, polybasic fatty acids, polybasic organic amines, sodium metabisulfite, formaldehyde, etc. as main raw materials. The amino retanning and fatliquoring agent prepared by esterification reaction, amidation reaction and condensation reaction can endow leather with better softness and surface feel, and has better fatliquoring performance and The finished leather has good firmness and fullness, and has very good retanning and filling performance; moreover, the amino retanning fatliquoring agent has good combination with chrome tanned leather fibers, high absorption efficiency, and meets the requirements of clean production.

The invention relates to a novel method for synthesizing 2-chloronicotinic acid. The method comprises the following steps of: taking 2-chloro-3-trichloromethylpyridine as a raw material, decomposing the 2-chloro-3-trichloromethylpyridine in alkaline water solution by heating, cooling down the alkaline water solution and adjusting the solution to acid to obtain a precipitate of the 2-chloronicotinic acid, suction-filtering, washing and drying the precipitate to obtain a white solid powder of the 2-chloronicotinic acid. The method has the advantages of simple and convenient production process and high yield, and the yield is 93 percent by taking the 2-chloro-3-trichloromethylpyridine as a basis.

The invention provides a method for efficiently recovering zinc and iron from zinc ferrite-containing materials, which comprises the following steps: grinding the zinc ferrite-containing materials, and according to the zinc ferrite-containing materials: sulfuric acid: sulfate = 1: 0.1~ 1: 0.01-1 mass ratio batching; mix the ingredients evenly, and roast at 150-400°C for 0.5-4h; stir and leach the roasted material at 25-90°C for 0.5-4h, filter, A zinc-iron solution and a filter residue are obtained; the zinc-iron solution is deironed by a goethite method to obtain goethite slag. The zinc-containing solution after iron removal can be extracted and electrowinning to obtain electro-zinc products, and the raffinate is circulated into stirring and leaching. After repeated cycles, the circuit is opened for evaporative cooling and crystallization to obtain sulfate crystals, which are returned to the batching section. The invention can realize high-efficiency decomposition, leaching and recovery of materials containing zinc ferrite, the recovery rate of zinc is more than 98%, and the recovery rate of iron is more than 95%, and has the advantages of high recovery rate, low energy consumption, recyclable solution and the like.

The invention belongs to the field of mechanical equipment, and relates to a device for refining tea, in particular to a device for separating tea stalks from stems and leaves, including a frame, a dust removal device is arranged above the frame, and a circular sieving machine is arranged at the bottom of the frame. A vibrating screening machine is provided on one side of the circular screen machine, a flat conveyor is provided above the circular screen machine, a shredder is provided above the flat conveyor, and an inclined conveyor is provided on one side of the shredder. A control cabinet is provided on one side of the frame. The present invention not only takes up less space, but also invests only one tenth of the original whole set of refining equipment. It is simple and easy to operate, and only one worker is needed to operate it; at the same time, the shredder is installed on the sealing belt dust removal device after being lifted up. Inside the box, there is no dust during the production process, which meets the current requirements of clean production.

The invention provides a method for recycling zinc and iron in zinc oxygen pressure leaching slag. The method comprises the following steps that ingredient preparation is conducted according to mass ratio of zinc oxygen pressure leaching slag: concentrated sulfuric acid: bisulfate being 1: 0.4-2: 0.1-2; the ingredients are uniformly mixed, and roasting is conducted at 200-40 DEG C and lasts for 0.5-5 hours to obtain a roasted product; the roasted product is subjected to sulfuric acid solution leaching at 20-95 DEG C, concentration of the sulfuric acid solution is less than 5 wt%, and the leaching time is 0.5-4 hours; filtering is conducted, zinc and iron are placed into filter liquor I containing zinc and iron, iron powder is added into the filter liquor I containing zinc and iron, the Fe<3+> is restored to Fe<2+>, and filtering is conducted to obtain filter liquor II containing zinc and iron; and the filter liquor II containing zinc and iron is subjected to zinc extraction, and therefore zinc can be recycled. The rest liquor containing iron is subjected to evaporation, refrigeration and crystallization, and therefore byproduct ferrous sulfate heptahydrate crystal can be obtained.The zinc and iron in zinc oxygen pressure leaching slag can be efficiently extracted. The recycling rate of the zinc is greater than 96%, and the recycling rate of the iron is greater than 95%. The method has the advantages that recycling rate is high, operation is convenient, and energy consumption is low.

The invention discloses a method for intensively leaching an iron complex phase in zinc oxygen pressure slag. The method comprises the following steps: grinding zinc oxygen pressure slag, and carrying out proportioning according to the mass ratio of the zinc oxygen pressure slag to concentrated sulfuric acid to sulfate being 1:(0.1-2):(0-1.0); uniformly mixing the ingredients, and carrying out roasting at 200-400 DEG C for 0.5-5 hours; and leaching roasted materials through a sulfuric acid solution at the temperature of 30-100 DEG C, wherein the concentration of the sulfuric acid solution is 0-10 wt%, the solid-to-liquid ratio (g / mL) is 1:4-1:10, and the leaching time is 0.5-4 h; and carrying out filtering, and entering an iron element into the solution. According to the method, the iron complex phase in zinc oxygen pressure can be intensively leached, the leaching rate of iron is larger than or equal to 80%, and the method has the advantages of being high in recovery rate, easy and convenient to operate, low in energy consumption and the like.