924results about How to "Raw materials are readily available" patented technology

The present invention provides a kind of formaldehyde gas oxidizing catalyst for room temperature use. Metal oxide is first obtained with soluble metal nitrate, carbonate or other inorganic salt and through oxidation and precipitation; and then loaded with small amount of metal to form the catalyst with room temperature formaldehyde oxidizing activity. The catalyst has metal oxide as main body and supported noble metal as active component, and features that the metal oxide may be oxide of Al, Ni, Mn, Si or Fe, and the noble may be Pt, Ru, Au, Rh or Pd. The catalyst of the present invention has high catalytic activity, and long sustaining time. The catalyst has formaldehyde converting rate up to 100 %, and results in low power consumption.

A composite oxide catalyst for removing NOx from the tail gas generated by combustion through low-temp selective catalytic reduction reaction in which ammonia gas or urea is used as reducing agent for reducing the NOx into N2 and H2O is prepared from a composite metallic oxide (whose main component is manganese oxide) and a porous inorganic oxide as carrier through citric acid complexing method.

The invention discloses a method for producing porous starch and its application by using starch, maize starch, tapioca starch, sweet potato starch and potato starch as raw material, and charging complex enzyme of saccharified enzymes and alpha-amylase possessing raw starch hydrolysis vitality under the temperature lower than gelatinization temperature, agitating continuously, reacting for a finite period of time at constant temperature, and obtaining porous starch product through centrifuging, scrubbing and drying.

The invention discloses a polymer ice-coating-preventing coating containing modified nano particles and a preparing method of the polymer ice-coating-preventing coating containing modified nano particles. The ice-coating-preventing coating comprises, by mass, 1-15% of silicone oil, 1-40% of modified nano particle with the particle diameter of 10-100nm, 15-75% of monomer or prepolymer used for bonding, 1-12% of hydrophobic resin, 1-30% of curing agent and 10-80% of thinning agent. The preparing method of the polymer ice-coating-preventing coating includes the steps that preparing of the modified nano particles is performed, preparing of the hydrophobic resin is performed, and the modified nano particles, the hydrophobic resin, the monomers or the prepolymers used for bonding, the curing agents, the thinning agent and silicone oil are evenly mixed to obtain the coating. The polymer ice-coating-preventing coating containing modified nano particles and the preparing method of the polymer ice-coating-preventing coating containing the modified nano particles have the advantages that raw materials for preparing the coating are easy to get, the process is simple, operation is convenient to carry out, a coating layer prepared by spraying the coating on a metal or glass substrate has a contact angle of 160 degrees in static water under a normal temperature and a low temperature, has a rolling angle of 4 degrees and has the good ice-coating-preventing effect.

The invention disclose a method for intercepting and fixing the persistent organic contaminants of soil through bio-carbon which includes the following steps: 1) a biomass material is carbonized for 0.5 to 6 hours under the temperature of 250 to 550 DEG C and the condition of oxygen limitation and passes through the screen of 10 to 200 meshes, thus preparing the bio-carbon; 2) the prepared bio-carbon is added into the soil polluted by the persistent organic matters according to the ratio of 1 to 200tons / hektare and the soil within 0 to 30cm of a surface layer is ploughed for leading the soil to be fully mixed with the bio-carbon; 3) after being aged, the bio-carbon fiercely absorbs the persistent organic matters, thereby greatly reducing the biological effectiveness thereof and being capable of producing safe farm products in the oil polluted by the organic mattes. The bio-carbon adopted by the treatment method has the advantages of easy obtaining, low cost, environmental friendlessness, non-secondary pollution, simple preparation technique, good treatment effect and long time effectiveness; simultaneously the bio-carbon contains a plurality of carbon and other nutrition elements, thus being capable of providing abundant carbon sources and nutrition for the growing of soil crops and having the effect for enriching the soil.

The invention discloses a preparation method for a multifunctional super-hydrophobic hybrid material (coating) which not only has the photocatalysis performance, but also has super-hydrophobic performance. The preparation method comprises the following steps: firstly, preparing stable silicon dioxide gelatin and titanium dioxide gelatin; adding the silicon dioxide gelatin and the titanium dioxide gelatin at the mass ratio of 1.0-4.0 into an organic silane alcohol solution; sealing, and standing at the temperature of 60-75 DEG C; washing for 3-5 times by an alcohol solution after 16-24 h standing; performing centrifugation, drying and crushing to obtain drainage TiO2-SiO2 mixed gelatin powder; adding the TiO2-SiO2 mixed gelatin powder into a polymer organic solvent, performing supersonic treatment for 30-60 min, quickly stirring at the room temperature for 10-30 min to obtain a mixed hybrid emulsifiable solution.

The invention provides fused iron catalyst for producing light olefins from syngas and a preparation method and application thereof. The fused iron catalyst includes iron oxide and cocatalyst and the proportion of the components is as follows by weight percent: 0.1-5 alumina, 0.1-6 potassium oxide, 0.1-4.0 calcium oxide and 0.01-8.5 other oxides, and balance iron oxide. The fused iron catalyst has the beneficial effects that (1) the materials of the fused iron catalyst are cheap and easy to get, the preparation process is simple, and the fused iron catalyst is low in cost and is suitable for industrial production; (2) the fused iron catalyst is of high mechanical strength as well as good pressure resistance and abrasion resistance and is suitable for a fixed bed, a fluidized bed and a slurry bed reactor; and (3) the fused iron catalyst has high Fischer-Tropsch synthesis activity and selectivity, the conversion per pass can be more than 95%, the selectivity of the methane is less than 10% and the content of the light olefins can reach 80-90%.

The invention provides a detection device of thermal control electrode electrochemiluminescence, which is characterized in that the detection device comprises a detection cell and an electrical heating system. The electrical heating system is connected with working electrodes of the detection cell, the working electrodes are conducting glass electrodes with indium-tin oxide (ITO) coating; the detection cell is a three-electrode system, the three electrodes are respectively connected with an electrochemical workstation which is connected with a computer; the detection cell is provided with a photomultiplier at the lower part; the photomultiplier is connected to a feeble light detector which is connected to the computer; the photomultiplier and the detection cell are both arranged in a dark box. The invention is simple to manufacture and convenient to use. The system is stable and is of low cost, which can facilitate in heating the working electrodes. The integrated thermal control ITO electrode electrochemiluminescence detection system has good sensitivity and repeatability on the detection of amines.

The invention discloses a carbon monoxide methanating catalyst with high hydrothermal stability and a preparation method thereof, and belongs to the technical field of preparation of catalysts. The carbon monoxide methanating catalyst is prepared mainly by a co-precipitation method according to the following steps: taking alumina (Al2O3) as a carrier and metal nickel as an active component, adding Zr and transition metals as additives, uniformly mixing salt solutions, precipitating, aging, performing suction filtration, washing, drying and calcining the mixture. The preparation method is simple; raw materials are easily available; the cost is low; and the prepared catalyst has the characteristics of high specific surface area, large pore volume and concentrated pore size distribution, is applicable to hydrogenation reactions, in particular to methanation reaction of high-concentration carbon monoxide, and has the advantages of wide using temperature range, high catalytic activity, high hydrothermal stability and the like.

The invention relates to a chemical catalyst preparation technology, and aims to provide a catalyst for low-temperature catalytic combustion of volatile aromatic hydrocarbons and a preparation method thereof. The catalyst is based on cordierite honeycomb ceramics, and the surface of the base body is sequentially provided with an aluminum coating, an additive coating and an active component layer from the inside to the outside; based on the total amount of the catalyst, the catalyst contains 85-90 wt% of the cordierite honeycomb ceramics, 8-12 wt% of the aluminum coating, 1-5 wt% of the auxiliary coating, and 0.05-0.5 wt% of the active component layer; wherein, the composition of the aluminum coating is alumina; the composition of the auxiliary coating is a rare earth metal oxide; The constituents of the active component layer are noble metals. The preparation process of the invention is simple, the preparation raw materials are easy to obtain, the specific surface area is large, the cost is low, and the catalytic combustion reaction of benzene series such as toluene has high catalytic activity; the active component has strong binding force with the matrix, and is not easy to fall off and crack It can still maintain high activity under high space velocity airflow and thermal shock.

The invention provides a low-temperature ammonia selective oxidation catalyst which is used for eliminating ammonia gas pollution generated in the field of industry, agriculture, traffic, architecture, and the like, and selectively catalyzing and oxidizing the ammonia into pollution-free nitrogen and water under lower temperature. The oxidation catalyst can completely convert the ammonia under the temperature above 160 DEG C, and has the nitrogen selectivity of nearly 80 percent, good low-temperature oxidbillity, high catalytic efficiency and high stability. The oxidation catalyst contains porous inorganic oxide carrier, silver as an active component and cerium as an accessory ingredient, wherein the porous inorganic oxide carrier can be silicon dioxide, aluminium oxide, zirconia, lanthana, zinc oxide or titanium dioxide or the mixture of more than one of the oxide; the active component is formed by loading silver which a metal element with the weight conversion value of 1-15 percent on the inorganic oxide carrier; and the accessory ingredient is formed by simultaneously loading cerium and silver with the metal element weight conversion value of 5-50 percent on the inorganic oxide carrier.

The invention discloses a method for preparing pseudo-boehmite. The method includes preparing water-soluble salt of aluminum into pseudo-boehmite by a hydrothermal method. The invention further discloses a method for preparing microcrystalline fused alumina abrasive. The method for preparing microcrystalline fused alumina abrasive includes by the sol-gel process, performing ball milling, drying, breaking and granulating, calcination and firing to the prepared pseudo-boehmite to prepare the microcrystalline fused alumina abrasive. The methods are convenient to implement, low in cost and suitable for large-scale production, and purity and particle strength of the prepared microcrystalline fused alumina abrasive are high.

The invention relates to a method for preparing flake porous ZnO nano powder, which comprises the following steps: adding ammonia into solution of zinc nitrate dropwise, and adjusting the pH of the solution to between 6 and 8; under the condition of stirring by magnetic force at the rotating speed of 0 to 180r / m, performing reaction at the temperature of between 0 and 80DEG C for 0.5 to 3 hours; separating, washing and drying the obtained cloudy solution to obtain a crosslinked flake and dispersed flake basic zinc nitrate precursor; and calcinating the basic zinc nitrate precursor with the two appearances at the temperature of between 220 and 500DEG C for 0.5 and 3 hours to obtain the flake porous ZnO nano powder. The nano ZnO product prepared by the method is white powder, belongs to a hexagonal system, has large specific surface area, high purity and good product quality, and responds to gas such as ethanol and acetone sensitively.

The invention discloses a mixed bacterial agent capable of degrading antibiotics in soil, belonging to the field of microbial technology. The mixed bacterial agent is prepared by mixing Bacillus subtilis J5P2 and Pseudomonas J2 according to a volume ratio of (0.1-3): 1. A preparation method for the mixed bacterial agent comprises the following steps: I, preparation of a suspension; II, colony culture: (1) preparation of a medium and (2) culture; III, separation of strains; IV, subculture and domestication: (1) domestication, (2) preparation of a LB medium, and (3) preservation; V, preparation of inoculum liquid; and VI, preparation of the mixed bacterial agent. The mixed bacterial agent provided by the invention has the characteristics of capacity of effectively degrading a plurality of residual antibiotics in soil and reducing environmental pollution, etc., and can be used for the remediation of land contaminated by antibiotics such as tetracycline, penicillin, sulfadiazines and quinolones.

The invention relates to a cocoyl dimethyl ammonium iodine oxide complex, and provides a chemical intermediate for preparing an iodophor disinfectant. The cocoyl dimethyl ammonium iodine oxide complex comprises the following components the following components in part by weight: 80 to 90 parts of cocoyl dimethyl ammonium oxide, 10 to 15 parts of iodine (I) and 2 to 5 parts of citric acid. A synthetic process comprises the following steps of: adding 80 to 90 kilograms of cocoyl dimethyl ammonium oxide into a closed stainless steel reaction kettle with temperature control, heating to the temperature of between 50+ / -2 DEGC, and adding 2 to 5 kilograms of citric acid; heating to the temperature of between 95+ / -2 DEGC, and adding 10 to 15 kilograms of iodine; and reacting in the reaction kettle for 3 hours, allowing a reactant to perform system circulation for 1 hour, and cooling to the temperature of between 30+ / -2 DEGC for discharging. The cocoyl dimethyl ammonium iodine oxide complex is in the appearance of dark violet thick liquid, and has the pH value of between 5 and 6 and iodine content of over 10 percent.

The selective hydrogen fluoride adsorbent is prepared with alkali metal fluoride, alkali earth metal fluoride and / or alkali metal fluorohydride, and through mixing, crushing into 50-120 mesh fine powder, mixing with silicon containing bauxite powder, alumino silica powder and / or water glass in 2-25 wt%, adding proper amount of water and blended into dough-like matter, extrusion to form, pelletizing and stoving. The adsorbent is suitable for adsorption of HF gas from mixed gas in the production of CFC, HCFC, HFC, SO2F2, etc with excessive HF as fluoridizer, and may reach a HF recovering rate as high as 95-99 %.

The invention relates to a modified lignin dispersant of a disperse dye and a preparation process thereof. The dispersant of the disperse dye comprises the following raw materials in parts by mass: 45.0-74.0 parts of pulping black liquid, 0.5-4.0 parts of oxidant, 3.0-8.0 parts of aldehydes, 0.5-5.4 parts of anion etherifying agent, 2.6-20.0 parts of amines, 8.0-18.0 parts of sulfonating agent and 10.0-30.0 parts of water. In the preparation process, black liquid produced in pulping industry is directly utilized to prepare the dispersant of the disperse dye, wherein the thermal stability of the dispersant at the temperatures of 130 DEG C and 150 DEG C is above level 4, the staining property of chinlon, terylene and cotton is above level 4, and the dispersion force of the dispersant is greater than 95%; on the basis that the cost of the product is greatly reduced, performances such as the dispersion force, the thermal stability and the like of the product are improved; the 'three wastes' are not discharged in the whole production process; and the high-value utilization of lignin is realized; and therefore, the preparation process is a clean and environment-friendly process.

The invention discloses primary diamido chelating resin and a preparation method thereof and belongs to the field of chelating resin waste water treatment. A constitutional unit of the primary diamido chelating resin is as follows as shown in the specification. The chelating resin has a certain space structure, and primary diamido groups of the resin has special adsorptive selectivity to copper ions.

The invention discloses application of a metal oxide modified CePO4 catalyst to collaborative denitration and demercuration. The application includes introducing medium-high temperature flue gas containing elemental mercury and nitrogen oxide into a catalyst loaded catalytic apparatus. Specifically, the main component of the catalyst is cerium phosphate, and the modification component is at least one of cobalt, manganese, copper, iron, vanadium, cerium, molybdenum and tin metal oxides. The temperature of the medium-high temperature flue gas is 250-420DEG C. According to the application of the metal oxide modified CePO4 catalyst to collaborative denitration and demercuration, the oxidation efficiency to null valence mercury in high temperature flue gas is high, the NO is the flue gas can promote and enhance the catalytic efficiency of the catalyst, and the practicability is strong. In addition, the catalyst has good medium-high temperature SCR activity and anti-sulfur and waterproof performance.

An organosilicon compound containing carbonyloxyether bond is disclosed, which can be used to synthesize the organosilicon material containing carbonyloxyether bond and to modify the surface of meso-porous Si material. Its preparing process is also disclosed.

The invention discloses a preparation method of polymer micro-capsules inspired by polyphenols chemistry. Based on polyphenols chemistry, the preparation of micro-capsules is carried out by taking calcium carbonate micro-spheres as templates, and tannic acid and polyethylene imine as raw materials. The tannic acid can be subjected to oxidative polymerization under the weak alkaline condition, a formed tannic acid oligomer can be adsorbed on the surfaces of the calcium carbonate micro-spheres, then the polyethylene imine is utilized for crosslinking the tannic acid oligomer to form a tannic acid oligomer / polyethylene imine coating, and finally the calcium carbonate micro-spheres are removed by utilizing ethylenediaminetetraacetic acid to obtain tannic acid oligomer / polyethylene imine polymer micro-capsules. According to the preparation method disclosed by the invention, the preparation raw materials are cheap and easy to obtain, the preparation conditions are mild, the preparation technology is simple and feasible, and the regulation and control of the morphology of the micro-capsules and the thickness of walls of the micro-capsules can be achieved by changing the concentration of the tannic acid and the concentration of the polyethylene imine in a preparation process.

The invention discloses a preparation method of porous nickel oxide / tin dioxide micro / nano spheres, which comprises the following steps: stirring tin tetrachloride pentahydrate, nickel sulfate hexahydrate, sodium hydroxide and ammonia water which are used as raw materials, heating, separating, washing, drying and the like to obtain micro / nano spherical hydroxy nickel stannate; and roasting a micro / nano spherical NiSn(OH)6 precursor at high temperature, and cooling to respectively obtain porous micro / nano spherical NiO / SnO2 powder. The micro / nano spherical NiO / SnO2 product prepared by the method disclosed by the invention is light green powder, and has the advantages of large specific area and good product quality. The impedance gas sensing element prepared from the micro / nano spherical NiO / SnO2 powder has high sensitivity, and the sensitivity S value for 100ppm methylbenzene and formaldehyde gases is respectively up to 19.8 and 27.6.

The invention relates to a Ca-Zn-Sn compound thermal stabilizer for stabalizer and its preparing method, which is based on Ca St2 / ZnSt2, comprised of angxiliary stabalizer and orgnic tin, with the main components: Ca / Zn compound of zincate and polyvinyl chloride-stabalizer portion and orgic tin 0.1-0.3 portion. The invention has outstanding thermal stabalization and processcable performance, increases thermal stabalization effect of thermal stabalizer, anlarge its application range, reduce the quantity of organic tin and decreases the productive cost.

The invention relate to a quaternary ammonium salt positive ion-type organic polymeric flocculant and a preparation method thereof. The polymeric flocculant contains a quaternary ammonium group, the positive ion degree is between 40% and 50%, and the raw material of the flocculant comprises the following components in parts by mass: 5-50 parts of dimethylamine, 1-45 parts of urea, 20-60 parts of epichlorohydrin, 1-40 parts of water, 1-5 parts of catalyst and 2-8 parts of cross-linking agent. In the invention, the product is less in dosage, is obvious in waste water-treating effect, and is especially suitable for treating slurry-preparing and paper-making paper waste water, printing and dyeing waste water and organic waste water containing active groups; and the preparation method is simple, the process conditions are mild, the preparation method is carried out by adopting a conventional device under the ordinary pressure, and no three wastes are discharged.

The invention discloses a preparation method for a stannic disulfide / graphene nanocomposite, a negative electrode of a lithium ion battery, and the lithium ion battery. The preparation method comprises the following steps of performing a hydrothermal process and a compounding process. By adoption of the preparation method, the stannic disulfide is subjected to direct in-situ growth on the surface of graphene; then the obtained stannic disulfide is washed and dried to obtain the sheet-shaped stannic disulfide / graphene nanocomposite; the material is applied to the negative electrode material of the lithium ion battery; the stability and the conductivity of the material are effectively improved; the performance of the battery is improved; and the stannic disulfide / graphene nanocomposite has the advantages of high cycling stability, high specific energy density and the like.

The invention discloses an inorganic-organic composite flocculant, a preparation method and an application thereof. The flocculant comprises, by mass, one part of poly aluminum ferric chloride, 0.02-0.08 part of polyvinylpyrrolidone, 0.02-0.06 part of chitosan and 0.05-0.15 parts of red clay. According to the inorganic-organic composite flocculant, the raw materials are simple and easy to obtain and environment-friendly, the preparation method is simple, all components are sequentially mixed and evenly stirred only; and in addition, the flocculant has good treatment effect on processing waste water of natural rubber and / or latex, the turbidity removal rate reaches more than 95%, and the removal rate of chemical oxygen demand (COD) reaches more than 70% and can reach up to 90%-92%.

The invention discloses a preparation method of a porous carbon microsphere. The preparation method comprises the following steps: subjecting o-dihydroxybenzene and formaldehyde to carry out polymerization reactions in a silica sol solution under the catalytic action of acid so as to obtain compound microspheres of o-dihydroxybenzene-formaldehyde resin-oxidized nano particles, and then subjecting the compound microspheres to the processes of carbonization and silicon oxide removing so as to obtain porous carbon microspheres with a even particle size. The size of the porous carbon microsphere is in a micron scale range; the porous carbon microsphere has a good spherical shape and a rough surface, is rich in medium holes with a size of 10 to 40 nanometers, integrally has two hole structures, namely the medium hole and the micro hole, and has a large specific surface area. The porous carbon microsphere has a high purity, and the carbon content can reach 95% or more.

The invention discloses a method for preparing a transitional metal / active carbon catalyst and belongs to the technical field of burnt gas chemical treatment and application. The preparation method comprises a step of loading an ion exchange resin and a step of carbonizing the ion exchange resin. The catalyst preparation method provided by the invention has the advantages of simple, convenient and easy operation, readily available raw material and low cost; and the load rate of the prepared transitional metal / active carbon catalyst is over 50 percent which is 10 to 40 times higher than that of a catalyst prepared by the common immersion method. The transitional metal / active carbon catalyst prepared by the invention, besides retaining the spherical shape of the original ion exchange resin,also has the advantages of uniform particle size distribution, smooth surface, uniform distribution of the transitional metal in and on the surface of the active carbon, and the like.

A novel totally chlorine-free bamboo-pulp bleaching process is provided. The invention relates to a novel totally chlorine free (TCF) bamboo-pulp bleaching process, is a new bionic bleaching technology for paper pulp. The invention essentially comprises the following procedures: (1) Synthesizing enzyme-imitated metal salen, using Schiff base salen to react with metallic organic acid salt to synthesize metal salen; (2) Pre-treatment bleaching bamboo pulp, carrying out bleaching pre-treatment on the oxygen delignification sulfate bamboo pulp with metal salen, NaOH, H2O2 and O2 existing; (3) Subsequent TCF bleaching, carrying out three bleaching treatments, namely, alkaline treating enhanced by hydrogen peroxide, bleaching by peroxy acid and bleaching by hydrogen peroxide the bamboo pulp pre-treated by enzyme-imitated metal salen. For the invention, the source is wide, the metal salen is easy to synthesize, the yield rate is high, the cost is low, the consumption is very low; the metal salen is easy to store, has no demanding requirement on the environment, can obviously improve the whiteness of paper pulp, reduce the load of waste water pollution in bleaching, and saves the use of bleaching chemicals.