77 results about "Potassium borohydride" patented technology

The invention discloses a preparation method of nano silver powder, which comprises the following steps: under a stirring condition, respectively dissolving silver nitrate, a complexing agent and a reducing agent in deionized water to respectively obtain a silver nitrate solution, a complexing agent solution and a reducing agent solution with the concentration of 150-400g / L, dropwise adding the complexing agent solution into the silver nitrate solution, and stirring to obtain a nano silver powder solution; the preparation method comprises the following steps: adding a reducing agent solution into a reaction kettle, reacting to obtain a silver complexing solution, dropwise adding the silver complexing solution into the reducing agent solution, reacting to generate a silver simple substance, and carrying out solid-liquid separation, washing and drying on the silver simple substance to obtain spherical nano silver powder; according to the preparation method, reaction is carried out in a water system, a high-molecular compound is not used as a dispersing agent, potassium borohydride, sodium borohydride and vitamin C are used as reducing agents to reduce the silver complex, the prepared silver powder is good in dispersing performance, particles are spherical, the purity is high, the sintering resistance is low, the preparation method is simple, and the yield of the silver powder is as high as 97% or above.

The invention provides a synthesis method and application of a sulfuration modified palladium-iron bimetallic material. The method comprises the steps that potassium borohydride and sodium sulfide nonahydrate are dissolved in a solvent, sodium hydroxide is added into a sulfuration solution, the pH of the sulfuration solution is adjusted to be alkaline, and an alkaline solution is obtained. The method comprises the following steps: dropwise adding an alkaline solution into a mixed aqueous solution of FeSO4. 7H2O and sodium tetrachloropalladate at a speed of 10mL / min in a nitrogen atmosphere; and separating the precipitate from the mixed aqueous solution in a magnetic separation manner, and washing the precipitate for three times by using oxygen-free water and absolute ethyl alcohol to obtain the palladium iron sulfide bimetallic particles. Through a one-step reduction method of vulcanization and palladium doping, vulcanization modification and bimetal modification are combined to act on zero-valent iron, the stability of the zero-valent iron is enhanced through vulcanization, meanwhile, the reactivity of the zero-valent iron is improved through addition of bimetal, especially the selectivity to pollutants such as chlorinated paraffin and the reactivity after surface passivation are improved, and the stability of the zero-valent iron is improved. And the reliability and efficiency of the zero-valent iron in organic pollution remediation are greatly improved.

The present invention discloses an oxygen-rich vacancy iron-based catalyst derived from a discarded heating pad, which uses the contents of the discarded heating pad as raw materials, obtains an iron-based catalyst uniformly mixed with activated carbon, vermiculite and Fe3O4 after anaerobic calcination, and then introduces abundant oxygen vacancies into the Fe3O4 structure through potassium borohydride reduction treatment to obtain an oxygen-rich vacancy iron-based catalyst. The present invention also discloses the use of the oxygen-rich vacancy iron-based catalyst in the degradation of organic pollutants in water bodies by Fenton-like oxidation technology. The method for preparing the oxygen-rich vacancy iron-based catalyst of the present invention is simple and mild, and the obtained catalyst has high yield, good effect, easy magnetic separation and recovery, reusability, regeneration, and a wide range of applications. The present invention uses discarded heating pads commonly seen in daily life as raw materials, which not only solves the resource utilization of waste, but also obtains a catalyst with application value, realizes the application in the remediation of organic pollutant wastewater, and meets the environmental goal of "treating waste with waste".

The invention relates to the technical field of perfume production, in particular to a composite catalyst, a preparation method thereof and a synthesis method of ambergris. The composite catalyst disclosed by the invention is obtained by quaternizing porous silicon dioxide and then loading aluminum trichloride; when the composite catalyst is applied to synthesis of ambergris, the composite catalyst can be matched with potassium borohydride, so that sclareolide can be subjected to a one-step reduction reaction to generate ambergris, the reaction condition is mild, the method is stable, generation of sclareolide ring-opening byproducts is reduced, the product yield is increased, and the yield can reach 95% or above.

The invention belongs to the technical field of pesticide chemistry, and particularly relates to a preparation method of a penconazole active compound, which comprises the following steps: by taking 2-(2, 4-dichlorophenyl) valeraldehyde and 1, 2, 4-triazole as starting raw materials, condensing and reducing under the action of a catalyst to obtain a penconazole crude product, and recrystallizing to obtain the penconazole active compound. Compared with the prior art, the penconazole active compound prepared by the invention has the advantages that the conversion rate of the raw materials is greatly improved, the problem that a derivative is generated by using potassium borohydride as a reducing agent is solved, so that the penconazole has atom economy and environmental protection property, the process flow is simpler, the operation steps of subsequent treatment and the use of a solvent are reduced, and the cost is reduced. The method is simple in operation and low in energy consumption, impurities in the penconazole preparation process are effectively removed, the purification rate and the yield of the penconazole technical are greatly improved, and the strict requirements for high-quality pesticides in agricultural production are met.

The invention relates to the technical field of cement grinding aids, and particularly discloses an efficient composite Portland cement clinker grinding aid and application thereof. The grinding aid comprises a liquid A and a liquid B which are separated from each other. Wherein the solution A comprises a mixed solution of ethylene glycol and water and iron dihydrogen phosphate. Wherein the volume ratio of the ethylene glycol to the water is (3-3.7): 1, and the iron dihydrogen phosphate in the mixed solution is in a saturated state. The solution B comprises a sodium borohydride and / or potassium borohydride solution, a polycarboxylate superplasticizer and modified magnesium oxide powder. Wherein the mass fraction of the sodium borohydride and / or potassium borohydride solution is 3-5%, the mass fraction of the polycarboxylate superplasticizer in the solution B is 12-17%, and the content of the modified magnesium oxide powder is 4.5-7 g / L. The grinding aid disclosed by the invention can effectively eliminate the electrostatic effect of cement particles, reduce re-agglomeration among the particles and improve the dispersity of cement clinker particles, so that the grinding efficiency is improved.

The invention discloses a preparation method of 3-quinuclidinone hydrochloride, which comprises the following steps: carrying out temperature control reaction on 4-picolinic acid and chloroacetic acid under alkaline water conditions to obtain an aqueous solution of a compound a, and directly entering the next reaction without post-treatment after the reaction is finished; adding a reducing agent alkaline water system into the aqueous solution of the compound a, controlling the temperature to react, controlling the temperature to adjust the pH value to 5-5.5 after the reaction is finished, extracting with n-butyl alcohol, and drying to obtain an n-butyl alcohol solution of a compound b, and directly entering the next reaction step; wherein the reducing agent is one of sodium borohydride and potassium borohydride; dropwise adding thionyl chloride into an n-butyl alcohol solution of the compound b, controlling the temperature to react after dropwise adding is ended, and concentrating to remove the solvent and unreacted thionyl chloride after the reaction is ended, so as to obtain a compound c; carrying out Dieckmann condensation reaction on the compound c at controlled temperature under the condition of organic alkali by using toluene as a solvent, carrying out hydrochloric acid quenching reaction after the reaction is finished, and directly carrying out next-step reaction after extracting and removing impurities from a water phase containing a hydrochloride solution of a compound d by using toluene; and carrying out a decarboxylation reaction on the compound d in a hydrochloric acid aqueous solution at controlled temperature, after the reaction is finished, adjusting the pH value to 10-13, extracting, and salifying to obtain a target compound TM, namely 3-quinuclidinone hydrochloride. The preparation method of 3-quinuclidinone hydrochloride provided by the invention has the advantages of economical and easily available raw materials, mild reaction conditions, efficient reaction, simple operation and low cost, and is suitable for industrial application.

The invention discloses a preparation method of a cyanoethoxy alkyl derivative, which comprises the following steps: 1, mixing polyose and deionized water, heating to 50-70 DEG C, adding a boron reducing agent in batches, cooling to room temperature, adding a catalytic amount of inorganic base into the reaction liquid according to the molar ratio of the polyose to the inorganic base being (1: 0.01)-(1: 0.1), stirring and dissolving, and reacting at 30-45 DEG C for 2-3 hours to obtain the cyanoethoxy alkyl derivative; the preparation method comprises the following steps: adding polyose into a reaction kettle, dropwise adding acrylonitrile, and after dropwise adding, carrying out heat-preservation reaction according to a feeding molar ratio of the polyose to acrylonitrile of 1: 5-1: 9; the boron reducing agent is selected from one of sodium borohydride, potassium borohydride and sodium cyanoborohydride; and 2, after the reaction is finished, firstly adding a benign organic solvent into the reaction liquid for extraction, then adding an inert organic solvent into the organic phase, stirring for crystallization, and carrying out vacuum drying on the precipitated solid to obtain the product. The method has the advantages of few side reactions, simple post-treatment, high product yield and high purity, and is suitable for industrial production.

The application belongs to the technical field of catalysts, and provides a titanium nickel nitride-based palladium catalyst, a preparation method and application thereof. The method comprises the following steps: mixing titanium tetrachloride, nickel acetate tetrahydrate and ethanol under an ammonia atmosphere, and performing a reaction to obtain a complex powder; performing a nitriding reaction on the complex powder under an ammonia atmosphere to obtain titanium nickel nitride nanoparticles; mixing the titanium nickel nitride nanoparticles, a chloropalladic acid solution, water and a potassium borohydride solution, and performing a reaction to obtain the titanium nickel nitride-based palladium catalyst. The catalyst prepared by the application has a high specific surface area and is composed of two parts, namely a titanium nickel nitride nanoparticle carrier and a supported Pd nanocluster. Among them, nickel atoms are doped between the titanium nitride crystal lattices. The Pd nanocluster is supported on the surface of the TiNiN carrier, and by adjusting the loading amount of Pd atoms, efficient and high-selectivity catalysis of various environmental hydrogenation catalytic processes can be realized.

The present invention discloses an octahedral BIF-29 catalytic material and a continuous preparation method and application thereof, which belong to the field of electrochemical catalysis. The octahedral BIF-29 catalytic material includes a metal copper salt and an organic ligand, wherein the organic ligand is tri(1H-imidazolyl) potassium borohydride; the metal copper salt is copper nitrate. The octahedral BIF-29 catalytic material is an M6L8 structure, that is, six metal copper sites are connected to eight organic ligands to form a cage structure, with six exposed mononuclear copper centers, which are connected to the ligands through copper-nitrogen bonds inside, and the micromorphology presents an octahedral morphology. The octahedral BIF-29 catalytic material only needs to be continuously synthesized at a lower temperature and can be used as an efficient electrocatalytic reduction of carbon dioxide catalyst without further treatment. The octahedral BIF-29 catalytic material in the present invention has an electrocatalytic carbon dioxide reduction conversion efficiency of up to 93.7% when participating in the electrocatalytic carbon dioxide reduction reaction.

The invention provides a preparation method and application of a cobalt-based super-crosslinked polymer-based porous material for wastewater purification. According to the preparation method of the cobalt-based super-crosslinked polymer, sodium borohydride / potassium borohydride is used as a reducing agent to reduce cobalt nitrate, so that cobalt is loaded on the surface of the super-crosslinked polymer to obtain a composite material of the super-crosslinked polymer and transition metal, namely a catalytic oxidation method is introduced on the basis of adsorption, PMS is activated through the transition metal to generate free radicals, and the cobalt-based super-crosslinked polymer is obtained. The removal effect of the super-crosslinked polymer on the anion organic pollutant brilliant blue is further improved. The invention verifies that the cobalt-based super-crosslinked polymer has good adsorption and degradation properties on various pollutants. The invention researches the application of the adsorption-degradation system of the cobalt-based super-crosslinked polymer in the actual water body, and the experimental result shows that the adsorption-degradation system has a good removal effect on the anion organic pollutants and has the potential of removing the anion organic pollutants in the actual water environment.

The application is a kind of continuous preparation method and application of core-shell type reduced Cu-based catalyst. The method uses membrane dispersion micro-reactor technology, adopts liquid phase chemical reduction method with potassium borohydride-hydrazine hydrate as double reducing agent, continuously prepares reduced Cu-based nanoscale catalyst, does not need high temperature calcination and hydrogen reduction, can be directly used as active catalyst for catalytic reaction, and realizes green and efficient preparation. The catalyst prepared by the application is used in the reaction of preparing N-butyl-2,2,6,6-tetramethyl-4-piperidinamine from 2,2,6,6-tetramethyl-4-piperidinone and n-butylamine through reductive amination, and excellent catalytic activity and stability are shown.

The present application belongs to the technical field of wastewater treatment, and particularly relates to a method for removing total nitrogen in wastewater. Iron salt and carbon material containing hydroxyl and carbonyl are added into water, and then potassium borohydride is added, and the obtained mixture is freeze-dried under argon protection atmosphere to obtain iron-carbon filler; the iron-carbon filler is added into wastewater, the wastewater is adjusted to be weakly acidic, and stirring reaction is carried out for 0.5-1.5 h to obtain reduced effluent; persulfate is added into the reduced effluent, the wastewater is adjusted to be alkaline, and stirring reaction is carried out for 0.5-1.5 h, and then solid-liquid separation is carried out, and the obtained supernatant is treated effluent. The present application can remove total nitrogen in wastewater only by using iron-carbon filler and persulfate at normal temperature and pressure, and has the advantages of fast conversion rate, strong anti-interference ability, no secondary pollution and the like compared with traditional chemical oxidation-reduction technology; the reaction has wide original sources, low price, simple operation, and is environment-friendly, and has obvious economic and environmental benefits.

The invention discloses a preparation method of a copper-based MOFs loaded nano-copper antibacterial material and application of the copper-based MOFs loaded nano-copper antibacterial material in tobacco charging essence, and the preparation method comprises the following steps: ultrasonically dispersing 1, 3, 5-benzenetricarboxylic acid in dimethylformamide to form a solution A; adding CuSO4. 5H2O into deionized water, and dissolving to form a solution B; mixing the solution A and the solution B, centrifugally filtering, and drying to obtain a ketone-based MOFs composite material; the preparation method comprises the following steps: adding CuSO4. 5H2O into deionized water, dissolving, and adding a copper-based MOFs material; the preparation method comprises the following steps: dissolving potassium borohydride, potassium hydroxide and hexadecyl trimethyl ammonium bromide in deionized water to prepare a reducing agent / protective agent mixed solution; after the copper sulfate solution is heated to 40-60 DEG C, a reducing agent / protective agent mixed solution is dropwise added, and when the solution becomes brick red, the PH is adjusted to 1-2 with dilute sulfuric acid; and pouring a sodium hypophosphite solution, stirring, centrifuging, and drying to obtain the copper-based MOFs loaded nano-copper material. The copper-based MOFs loaded nano-copper antibacterial material provided by the invention can be used for carrying out rapid cold sterilization treatment on the flavoring essence, so that the shelf life of the flavoring essence is prolonged, and mildew and deterioration are prevented.

This invention provides a PVP-coated Cu-based electrocatalytic material, its preparation method, an electrode for electrocatalytic carbon dioxide reduction, and its application. Copper chloride dihydrate, polyvinylpyrrolidone (PVP), and dimethylformamide are mixed to obtain a mixture. Under a protective atmosphere and with stirring, potassium borohydride solution is added dropwise to the mixture, generating a precipitate. The precipitate is then centrifuged and dried to obtain the PVP-coated Cu-based electrocatalytic material. This invention introduces PVP, which has the advantages of low cost and wide availability. Cross-linked nanosheet-like copper-based catalytic materials are successfully prepared by reducing divalent copper ions with potassium borohydride solution. During the reduction process, 0.18–0.22 g of PVP (based on 2 mmol of copper) is introduced to coat the copper nanosheet structure, effectively regulating the valence state change of divalent copper ions during the reduction process, controlling it between monovalent and divalent copper, thus making it more favorable for the formation of C2 products.

The invention discloses a nitrogen-phosphorus-boron-iron co-doped coconut shell activated carbon carrier and a preparation method and application thereof, the method comprises the following steps: S1, crushing coconut shell activated carbon, and carrying out Ar / water vapor activation treatment to obtain pretreated activated carbon; s2, after the chitosan solution and the urea solution are mixed, phytic acid is added, the pH is adjusted to 5.5-6.0, stirring is conducted, and a wetting agent is obtained; s3, adding a wetting agent into the pretreated activated carbon, heating, stirring, filtering, washing, and drying in vacuum to obtain pre-activated activated carbon containing nitrogen and phosphorus; and S4, dissolving ammonium ferric citrate and sodium citrate in deionized water, adding ethylene glycol, stirring, then adding the pre-activated activated carbon containing nitrogen and phosphorus, heating, stirring again, then dropwise adding a potassium borohydride mixed solution, and roasting to obtain the nitrogen, phosphorus, boron and iron co-doped coconut shell activated carbon carrier. After the nitrogen-phosphorus-boron-iron co-doped coconut shell activated carbon carrier provided by the invention is loaded with the metal catalyst, the common problems of low conversion rate and poor selectivity in nitro hydrogenation reaction can be solved.

The invention discloses an efficient and safe microwave digestion-atomic fluorescence detection method for total selenium in soil, and belongs to the technical field of analytical chemistry and environmental detection.According to the method, the content of total selenium in selenium-rich soil is rapidly, accurately and safely measured by optimizing the sample weighing amount, the microwave digestion procedure and the detection conditions, and the detection accuracy is improved. The method comprises the following specific steps: weighing 0.1 g of an air-dried and sieved selenium-rich soil sample, adding 5mL of concentrated nitric acid, then carrying out a microwave digestion process of heating to 175 DEG C for 12 minutes and maintaining for 48 minutes, after digestion, adding 5mL of 6mol / L hydrochloric acid, carrying out acid removal reduction at 140 DEG C, fixing the volume to 15mL by using 5% diluted hydrochloric acid, and finally determining by using an atomic fluorescence spectrophotometer by using 5% hydrochloric acid as a carrier current and 1% potassium borohydride and 0.5% potassium hydroxide as reducing agents. According to the method, the use of dangerous reagents such as hydrofluoric acid and perchloric acid is avoided, the detection period is remarkably shortened, the linear range is 0-10 mu g / L, and the correlation coefficient is Rgt; the average recovery rate is up to 101.13%-101.51%, and the precision is RSDlt (Research Standard Defect); the requirements of rapid detection of the total selenium content of the selenium-rich soil, agricultural production and environmental evaluation are met.

The utility model provides a liquid chromatography-atomic fluorescence flow path analysis system, which relates to the technical field of chemical analysis, and comprises a mobile phase processing device, a sample online reaction device, a gas path device and a gas-liquid separation device, the sample online reaction device is used for carrying out separation, online ultraviolet digestion and hydride generation on a sample; according to the device, the mobile phase does not need to be degassed manually, an experimenter only needs to prepare the mobile phase and place a pipeline in a corresponding reagent bottle, and an instrument can perform online degassing on the mobile phase, so that the time required for preparing the mobile phase is saved, hydrogen is supplemented when a sample reacts with a reducing agent to generate gaseous hydride, the dosage of potassium borohydride is effectively reduced, and the production cost is reduced. While the physical health of experimenters is ensured and a friendly laboratory environment is provided, the influence of water vapor on a test result can be reduced, and the sensitivity and the stability of an instrument are improved.

The invention discloses a powder metallurgy material and a preparation method thereof, and belongs to the technical field of powder metallurgy, and the powder metallurgy material comprises the following raw materials in parts by weight: 0.5-1.1 parts of carbon nanotubes, 1.5-2.5 parts of copper, 1.8-3.2 parts of aluminum, 2.0-3.5 parts of nickel, 0.5-0.8 part of titanium, 0.1-0.4 part of a pore-forming additive, and the balance of iron based on 100 parts. Wherein the pore-forming additive comprises the following raw materials in parts by weight: 30-50 parts of copper sulfate, 20-30 parts of titanium dioxide, 10-25 parts of silicon nitride and 3-5 parts of potassium borohydride. According to the technical scheme, the pore-forming additive is creatively added into the iron-based powder metallurgy material, copper sulfate, titanium dioxide and silicon nitride react in the state of the reducing agent to generate a porous material, and the porosity of a finished product can be improved in the powder metallurgy material machining process; and meanwhile, in cooperation with the blank sintering mode, the hardness can also meet the ideal requirement.

The invention provides an efficient preparation method of 6-hydroxy-8-chloro caprylic acid ester. The method comprises the following steps: synthesizing adipic acid into adipic acid monoester acyl chloride, then carrying out addition on the adipic acid monoester acyl chloride and ethylene under the catalytic action of aluminum trichloride, then treating by using sodium isopropoxide, and converting carbonyl into hydroxyl by using a Meerwein-Ponndorf-Verley reduction method to obtain 6-hydroxy-8-chloro caprylate. Compared with an existing preparation method, potassium borohydride reduction is avoided, the manufacturing cost is reduced, and the operability of the production process is improved. The high-efficiency preparation method of 6-hydroxy-8-chloro caprylate provided by the invention has the advantages of simplicity and convenience in operation, clear steps, high product purity and the like, is suitable for industrial production of 6-hydroxy-8-chloro caprylate compounds, and has a good application prospect and a wide market demand.

The invention discloses a method for harmless treatment of waste white phosphorus and recovery of copper, and belongs to the technical field of harmless treatment of hazardous waste, white phosphorus is dissolved in carbon disulfide, the carbon disulfide is slowly and dropwise added into a copper sulfate aqueous solution at the speed of 0.1-0.3 kg / min and reacts with the copper sulfate aqueous solution to generate copper and cuprous phosphide, and the cuprous phosphide is recycled. According to the method, the white phosphorus is dissolved in the carbon disulfide, the specific surface area of the white phosphorus is increased, the white phosphorus can be in full contact with the copper sulfate solution at the normal temperature to react to generate copper and cuprous phosphide, and the cuprous phosphide can be recycled after the reaction is finished. The method is simple, easy to operate and capable of saving chemicals, copper in copper sulfate is recycled while waste white phosphorus is subjected to innocent treatment, resources are reasonably utilized, cost is saved, safety and high efficiency are achieved, and good economic benefits are achieved.

The invention discloses a catalyst for preparing citronellal by selective reduction of citral and a preparation method thereof. A magnesium oxide carrier is obtained by calcining a magnesium salt at high temperature, a palladium precursor is uniformly loaded on magnesium oxide by adsorption, palladium is reduced with sodium borohydride, potassium borohydride or sodium formate, and then a hydrophobic hydrogenation catalyst is obtained by modification with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane. The catalyst prepared in this way has high catalytic activity and selectivity for the reaction of preparing citronellal by selective reduction of citral. The catalyst active components of the present invention are highly dispersed, highly active, and have a selectivity of ≥98%, and the catalyst cost is low, and has a high industrial application value.

The invention discloses a fermentation type seaweed granular fertilizer and a fermentation method thereof, and belongs to the technical field of biological fertilizers, plant active substances of enzymolysis seaweed active powder, grain byproducts and organic nutrition of soybean meal are fused, after microbial fermentation, nutrition release is more balanced, robust growth of crops can be promoted, and the yield and quality can be improved; seaweed residues are secondarily utilized through an enzymolysis technology, macromolecular substances are degraded into micromolecular active components through alginate lyase and cellulase, enzymolysis seaweed active powder is prepared, the nutritive value of seaweed is excavated to the maximum extent, the cost of raw materials is reduced, nano zeolite serves as a carrier of microelements, iron ions are reduced and stabilized through potassium borohydride, and then iron ions are reduced and stabilized through potassium borohydride; and then the nitrohumic acid is used for chelating elements such as zinc, iron and boron, and the adsorption performance of the nano zeolite is combined, so that the double stability of the chelated trace elements and the porous carrier is realized.

The application discloses a preparation method of an anode material for treating organic wastewater, and comprises the following steps: (1) dissolving silver nitrate, ammonia water, sodium hydroxide and formaldehyde in deionized water to obtain a precursor solution, then fixing a commercial electrode in the precursor solution, and performing heating and stirring treatment to obtain an Ag / commercial electrode sheet; (2) preparing a plating solution by using nickel salt, ethylenediamine, potassium borohydride and sodium hydroxide, then fixing the Ag / commercial electrode sheet obtained in the step (1) in the plating solution, and performing heating and stirring treatment, and then performing washing and drying to obtain the anode material. When the electrode material is used for electrocatalytic oxidation treatment of 3-aminomethyl-3, 5, 5-trimethylcyclohexylamine wastewater, the ammonia oxidation rate is higher, and the COD and NH4-N values of the organic wastewater can be effectively reduced. The application further discloses the anode material obtained by the preparation method and application thereof.

The invention relates to the field of catalysts, and provides a preparation method and application of a catalyst for synthesizing 1, 4-cyclohexanedimethanol. The preparation method comprises the following steps: adding a carrier, a salt of noble metal, a salt of non-noble metal and potassium borohydride into a solvent, uniformly dispersing, evaporating the solvent, and collecting a solid; the molar ratio of the noble metal to the non-noble metal is 1: (0.5-2); the noble metal is one of ruthenium, palladium and platinum, and the non-noble metal is vanadium or rhenium; and roasting the solid at 300-500 DEG C for 2-4 hours, and reducing at 200-400 DEG C for 2-4 hours to obtain the catalyst. The invention also provides an application of the catalyst in synthesis of 1, 4-cyclohexanedimethanol. According to the invention, proper noble metal and non-noble metal are selected to be loaded on the carrier to prepare the catalyst, the catalytic performance is improved through the metal-metal oxide synergistic effect, and higher conversion rate of 1, 4-cyclohexanedicarboxylic acid and higher yield of 1, 4-cyclohexanedimethanol can be obtained at lower temperature and pressure.

The application provides a preparation method of an nZVCu@AF composite material and application thereof, and comprises the following steps: under the protection of nitrogen, equal-volume-ratio 0.01-0.1M Cu(II) solution and 0.2-2.0M potassium borohydride solution are simultaneously added drop by drop into amyloid fiber suspension liquid, the volume ratio of the dropwise added solution to the amyloid fiber suspension liquid is 1:2, and the obtained material is sufficiently stirred and reacted for 2-6h; the obtained material is repeatedly washed with ultrapure water to remove impurities, and then vacuum freeze-dried to obtain the nZVCu@AF composite material. The application solves the problems that organic phosphorus compounds are difficult to degrade and have low mineralization rate, and constructs a one-step deep treatment method for water body organic phosphorus, which can efficiently induce inorganic conversion of organic phospholipid and realize in-situ phosphorus recovery.

The invention provides a preparation method of a clarithromycin crude product, and relates to the technical field of medicine preparation. According to the method, oxime etherified silanide is taken as a starting material, various methylation reagents are adopted, toluene is taken as a solvent system, tributyl methyl ammonium chloride is taken as a solid-liquid phase transfer catalyst, potassium hydroxide is taken as an acid-binding agent, a methylation reaction is carried out, deprotection is carried out through tetrabutylammonium fluoride, and oxime hydroxyl is reduced through potassium borohydride, so that a clarithromycin crude product is obtained.

The invention relates to a production method for improving photo-thermal stability of a chloromethyl ethyl ether industrial product, and belongs to the technical field of chloromethyl ethyl ether processing.The preparation of an intermediate 1 comprises the steps that 80-120 mL of ethyl alcohol, 20-25 g of 3, 5-di-tert-butyl-4-hydroxybenzaldehyde and 6-10 g of n-butylamine are added into a 250 mL four-opening bottle provided with a backflow water diversion device, the temperature is increased to 60 DEG C, a reaction is carried out for 1 h, and an intermediate 2 is obtained; cooling to 0 DEG C by adopting an ice salt bath, adding 1-3g of potassium borohydride in batches, keeping the temperature at 0 DEG C, continuing to react for 0.5 hour, and adding a 5% citric acid aqueous solution to adjust the pH value to 2.0-3.0; the special photo-thermal stabilizer is synthesized and compounded with the epoxidized soybean oil, a single stabilizer and a special formula free of chloromethyl ether are generally adopted in the traditional method, the photo-thermal stabilizer containing the hindered phenol and piperazine structure is synthesized by the method, synergistic protection of light shielding, thermal stability and acid capture is achieved after compounding, and the product performance is remarkably improved; and the purity retention rate is 95-97% after 168h of ultraviolet aging.

The application relates to the field of photocatalysis, in particular to a composite material for photocatalytic degradation of PFOA and a preparation method thereof. The composite material comprises the following steps: step one: using titanium foil as an anode and a nickel sheet as a cathode, carrying out anodic oxidation, and then annealing to obtain TiO2-NT; step two: first, acid pickling TiO2-NT, and then preparing TiO2-NT suspension liquid; adding chloroplatinic acid, a dispersing agent and potassium borohydride into the TiO2-NT suspension liquid to prepare a Pt / TiO2-NT composite material; step three: coating ammonium perrhenate on the Pt / TiO2-NT composite material, and then sintering, repeating 1-2 times to obtain a modified Pt / TiO2-NT composite material; and step four: preparing a MIP-Pt / TiO2-NT composite material through a molecular imprinting technology.

The invention discloses a method for disposing potassium permanganate wastewater, comprising the following steps: adding acid to potassium permanganate wastewater to adjust the pH value of the solution to 2‑3, adding a discarded reducing agent at a rate of less than 10 g / min until the potassium permanganate wastewater fades and becomes colorless; the discarded reducing agent is discarded potassium borohydride or sodium borohydride. The inventive method is simple, easy to operate, saves medicaments, and disposes of discarded potassium borohydride, sodium borohydride, and waste acid while disposing of potassium permanganate wastewater, rationally utilizes resources, saves costs, is safe and efficient, improves production capacity, and achieves the purpose of waste coordinated disposal and waste treatment, with good economic benefits.