44results about How to "Alkaline" patented technology

The invention relates to a compound repair agent for heavy metal polluted soil which is characterized by being prepared from the following raw materials in percent by weight: 40-55% of charcoal, 15-35% of bone powder and 15-35% of coal ash. By taking agricultural or industrial solid wastes which are wide in source and easy to obtain as a raw material, the compound repair agent is simple in process, sufficient in raw material, low in cost and obvious in application effect, reduces the heavy metal mobility and bioavailability of soil, and can solve the problem of sustainable utilization of heavymetal pollution in farmlands and fields of industrial and mineral industry. The application method is simple, the using process is labor-saving, the physical and chemical properties of soil can be also improved effectively, the fertilizer retaining and water retaining ability of soil is improved, and the compound repair agent is easy to popularize and apply.

The invention belongs to the chemical field of materials and relates to a preparation method of a lithium ion battery cathode material with a high specific capacity, in particular to a preparation method of the nitrogen-doped carbon nano fiber compound zinc oxide lithium ion battery cathode material. The preparation method comprises the following steps: first, preparing nitrogen-doped carbon nanofibers by means of an electrospinning method, wherein as polyacrylonitrile fibers are rich in nitrogen, the polyacrylonitrile fibers are carbonized at a high temperature to obtain the nitrogen-doped carbon nano fibers; and then preparing the zinc oxide/nitrogen-doped carbon nano fiber compound lithium ion battery cathode material by means of a hydrothermal method. The lithium storage electrochemical performance of the ZnO cathode material is improved by regulating the shape of ZnO and compounding the ZnO with the nitrogen-doped carbon nano fibers which are good in conductivity, the volume expansion problem of ZnO in a circulating process is alleviated, the conductivity is improved, and the specific capacity is improved.

The invention discloses an esomeprazole preparation method and an esomeprazole magnesium preparation method. The esomeprazole preparation method is characterized in that a catalytic oxidation of omeprazole sulfide is carried out under the action of an added oxidant in the presence of bidentate chiral aminoalcohol and titanium alkoxide at room temperature to obtain a chiral proton pump inhibitor esomeprazole in a single enantiomer or enriched enantiomer form. The above preparation methods have the advantages of no need of the addition of an alkaline reagent, easy obtaining and reuse of the bidentate chiral aminoalcohol participating in the above reaction, increase of the utilization rate of the chiral aminoalcohol, substitution of expensive D-(-)-diethyl tartrate, and production cost reduction; and the chemical purity and the reaction overall yield of the prepared esomeprazole magnesium reach 99.7% and 66% respectively.

The invention provides a biochar-based sand modifier and a preparation method thereof and belongs to the technical field of compound fertilizer. The biochar-based sand modifier comprises biochar, nitrogen fertilizer, phosphorous fertilizer, potassium fertilizer and bentonite clay minerals. The preparation method comprises the following steps: smashing the biochar, then mixing with the nitrogen fertilizer, phosphorous fertilizer, potassium fertilizer and bentonite to form premix, granulating, and drying, so that the biochar-based sand modifier is obtained. The biochar-based sand modifier obtained by adopting the preparation method has the advantages that the biochar can improve a sand soil structure and has carbon fixation effect, release of fertilizer in soil can be delayed and continuous fertilization effect is achieved when the biochar is combined with the other components, the soil structure can be improved at the same time, and product quality can be improved.

The invention discloses a preparation method of electrolyte used in an all-vanadium redox flow battery. The method comprises the steps that: vanadium slag is roasted by using sodium salt, and is processed through aqueous extraction and impurity removing, such that a sodium metavanadate solution is prepared; the sodium metavanadate solution is subject to acid modulation, and is subject to a reaction with concentrated hydrochloric acid, such that a VOSO4 solution is obtained; the VOSO4 solution is concentrated, such that the all-vanadium redox flow battery electrolyte is obtained. With the preparation method, the pollution to the environment can be effectively avoided, and production cost can be reduced. The method is beneficial for large-scaled productions. Also, with the method, existing vanadium resources such as vanadium slag can be reasonably utilized, such that vanadium resource waste is avoided, and production cost is reduced.

The invention discloses a technology for recycling valuable metal from jarosite slag. The technology is characterized in that a dispersing agent is added to water to be evenly stirred; then, jarosite slag and a reducing agent are added to be evenly stirred; and lime is added to be evenly stirred to obtain sediment containing ferric oxide and calcium sulfate, and liquid and solid are separated. A water repellent agent and a floating agent are added to liquid, and valuable metal is recycled. A solution obtained after the valuable metal is recycled can be used as water for dissolving jarosite slag to be recycled, and the solid sediment can be used as raw materials used in the cement production process.

The invention relates to a biogas residue thermal cracking solid product and an application method thereof. The application method comprises the steps that combined anaerobic digestion treatment is performed on sludge and garden waste, and part of obtained biogas residues are treated through press-filter dewatering and then prepared into material precursors under the hydrothermal condition; thermal cracking is performed on the material precursors, and products are smashed and screened through a sieve to obtain particles; the particles are mixed with inoculating sludge, the activity of inoculated microorganisms is enhanced, enhanced-type inoculating sludge is prepared, and the obtained enhanced-type inoculating sludge and the particles obtained through smashing and screening are reused in the anaerobic digestion treatment process. Accordingly, the methane generating efficiency in the combined anaerobic digestion process of the sludge and the garden waste is improved, the anaerobic digestion time is shortened, the waste treatment efficiency is improved, the waste utilization value is increased, and a green and environment-friendly novel municipal solid waste treatment and reclamation method is achieved.

The invention discloses a method for synthesizing tributyl phosphate by a sodium formate aid-binding method. The method comprises the following steps of: dissolving sodium formate into butanol; adding phosphorus oxychloride dropwise into the solution at the temperature of between 5 and 15 DEG C, and then preserving the heat and reacting with stirring for 15 to 30 minutes; and then performing distillation: performing atmospheric distillation, collecting fraction at the temperature of between 100 and 105 DEG C to obtain formic acid, and then reducing pressure to -0.96 to -0.98Mpa, and collecting the fraction at the temperature of between 160 and 180 DEG C to obtain the tributyl phosphate. In the method for synthesizing the tributyl phosphate by the sodium formate acid-binding method, the sodium formate is weak acid strong alkali salt and has a certain alkaline and is reacted with hydrogen chloride to form sodium chloride and the formic acid, and the formic acid subjected to separation can be reacted with sodium hydroxide to form the sodium formate for cycling; and compared with the conventional method, the method has the advantages that vacuumization is not needed, the using amount of the butanol is close to a theoretical amount, the yield of the tributyl phosphate is high (the yield is over 92.0 percent), and the like.

The invention discloses a catalyst for decomposing the heavy components in a neopentyl glycol synthesis waste liquid, a preparation method and applications thereof, wherein the catalyst is a Cu/Mg-Zr-Al-O composite alkali catalyst, the Cu element exists in the form of cupric carbonate basic, and based on the mass of the catalyst, MgO accounts for 10-30%, ZrO2 accounts for 10-30%, Al2O3 accounts for 10-30%, and Cu2(OH)2CO3 accounts for 30-50%. According to the present invention, the composite alkali catalyst has two alkaline sites, wherein the one alkaline site is derived from MgO, ZrO2, Al2O3and other oxides, and the other alkaline site is derived from cupric carbonate basic, such that the catalyst has strong alkalinity, and has good catalysis effects in neopentyl glycol (NPG) preparationthrough the decomposition of ester-base impurities in NPG device heavy component waste liquids, wherein the decomposition rate of various ester-based impurities can reach more than 90% so as to effectively improve the economic benefits of the device.

The invention belongs to the field of nano materials and in particular to a supercapacitor electrode material, and a preparation method and application thereof. A preparation principle is that a coordination compound is generated by utilizing the coordination of triethanolamine and metal ions, wherein the triethanolamine has a certain alkalinity in an aqueous solution, can be electrolyzed to produce OH-, and the coordination compound and OH- react to produce the metal hydroxide hydrogel. The preparation method comprises the following steps of filtering, washing and drying the generated metalhydroxide hydrogel to obtain a metal hydroxide film; cutting the metal hydroxide film into a desired size; and sandwiching a metal foam current collector between two foamed nickel current collectors,laminating the three current collectors into one body at the pressure of 5 to 20MPa to form a working electrode for a supercapacitor. The invention provides a supercapacitor electrode material, and apreparation method and application thereof. The electrode material can realize the function of a conventional supercapacitor without a conductive agent and an adhesive.

The invention discloses an industrial degreasing and deoiling agent and a preparation method thereof. The industrial degreasing and deoiling agent is prepared by the following raw materials in parts:0.3-1.5 parts of triethanolamine, 1-4 parts of sodium carbonate, 0.5-3.5 parts of sodium tripolyphosphate, 2-8 parts of sodium hydroxide, 0.5-4 parts of polyethylene glycol, 0.5-5 parts of trisodium phosphate, 0.3-1.8 parts of industrial salt, 0.5-2.5 parts of high-molecular composite synergia active agent, 20-50 parts of de-ionized water, and 0.2-0.8 part of water essence, wherein the part of thewater essence is the volume part, and the parts of the rest raw material parts are the weight parts. The prepared industrial degreasing and deoiling agent is high in degreasing and deoiling efficiency, excellent in degreasing and deoiling effect, incapable of damaging the surface of a substrate to be treated and simple and convenient to use.

The invention relates to a catalyst for preparing low-carbon olefin through carbon dioxide hydrogenation, belongs to the technical field of composite materials, and particularly relates to preparation and application of a perovskite-graphite phase carbon nitride composite material. After the composite material is subjected to surface processing, a large number of hydroxyl groups and amino groups exist on the periphery of the structure, and strong interaction can be generated between the composite material and perovskite metal. The catalyst has a unique electronic structure and good chemical stability, the olefin selectivity is improved through interaction between the surface-modified carbon nitride and perovskite iron oxide, and the surface-modified carbon nitride provides a reliable scheme for preparing olefin through hydrogenation reaction.

The invention discloses a corrosion-resistant cutting fluid which is composed of the following components in parts by mass: 10-15 parts of polyvinyl alcohol, 5-10 parts of stearic acid, 3-6 parts of triethanolamine, 5-8 parts of sodium carbonate, 3-5 parts of sodium cumenesulfonate, 120-140 parts of diluted cucumber juice, 1-3 parts of preservative, 0.1-0.5 part of bactericide, 0.1-0.3 part of softener and 0.03-0.06 part of defoaming agent. By selecting excellent materials and adopting the scientific processing method, the corrosion-resistant cutting fluid solves the problems of corrosion, deterioration and smelliness for the machine tool in the past cutting fluid, and can prevent the corrosion, cavitation corrosion and scaling on the machine tool internal surface and form a protective layer. The corrosion-resistant cutting fluid has favorable cooling and lubricating effects, generates fewer precipitates in the use process, and ensures the workpieces to be clean and acceptable. Nitrites and phosphorus and sulfur compounds are eliminated in the product formula, and the cucumber juice is added; and thus, the product is green and environment-friendly. The properties of the product are not changed; and the product has the advantages of high economy, low cost, no toxicity and no adverse effect on skin.

The invention provides a method for recovering imidacloprid from imidacloprid production concentrated mother liquor residues. The method comprises the following steps: adding a non-polar solvent into imidacloprid concentrated mother liquor residues at 0-35 DEG C under a stirring condition, dropwise adding an inorganic strong acid, and reacting the inorganic strong acid with imidacloprid in the mother liquor residues according to a molar ratio of (1.0-5.0): 1; and after stirring for a certain time, standing to separate out an acid water layer, adding a non-polar solvent into the acid water layer, dropwise adding alkali liquor while stirring to neutralize until the pH value is 7-8, standing to separate out a solvent layer, cooling, crystallizing and filtering to obtain the product imidacloprid. After the product imidacloprid is recovered from mother liquor concentrated residues, the synthesis yield of the product is improved while three wastes are reduced.

An iron-based Fischer-Tropsch synthesis catalyst is prepared from 20 to 30 percent of metal iron and the balance of carbon. The carbon is prepared from nano polyacrylamide, citric acid and amino acid.The preparation method of the iron-based Fischer-Tropsch synthesis catalyst comprises the following steps of: 1, formation of an iron citrate complex; 2, formation of amino acid modified nano polyacrylamide gel; 3, formation of gel loaded with iron; and 4, preparation of the iron-based Fischer-Tropsch synthesis catalyst. The iron-based Fischer-Tropsch synthesis catalyst has the characteristics ofgood sintering resistance and high stability.