129 results about "Cuprous chloride" patented technology

The invention discloses a method for recovering nearly all elements in low-precious-metal zinc replacement powder, which belongs to the technical field of non-ferrous metal wet smelting, and comprises the following steps: preparing zinc replacement powder, oxidizing and leaching, extracting copper, preparing cuprous chloride, electrodepositing zinc in raffinate, extracting precious metal by using a gold extracting agent, extracting, reducing and smelting to prepare a gold ingot and a silver ingot, and dissolving by using sodium hydroxide. Preparing lead carbonate; carrying out oxidation acid leaching; replacing; and smelting bismuth. According to the technology for achieving recovery and high-value utilization of nearly all elements in the zinc replacement powder under the mild condition, the technology can be carried out at the normal temperature, the high-pressure condition does not need to be provided, the zinc replacement powder is leached through the acid solution, then various valuable metals are selectively extracted from the leaching solution, corresponding downstream products are prepared, and the method is suitable for industrial production. The method realizes value maximization, does not generate secondary pollution, does not introduce fluorine, has low requirements on equipment, is simple in process and easy to operate, and makes up for the defects of the zinc replacement powder treatment process in the prior art.

The invention relates to a composite catalyst for improving synthesis of methylchlorosilane and a preparation method of the composite catalyst, and belongs to the technical field of composite catalysts. The catalyst comprises a main catalyst (a compound of cuprous chloride and metal zinc, the molar ratio of Cu to Zn being 1: (0.1-0.5)), a co-catalyst (alumina or stannic chloride, the mass of which is 5%-20%) and a carrier (porous silica gel or nitrogen-doped activated carbon, the loading capacity of which is 3-8 times). Through optimization of catalyst composition, carrier functionalization (such as sulfydryl modification) and a preparation process, the selectivity (greater than or equal to 85%) of dimethyldichlorosilane is remarkably improved, and the stability and activity of the catalyst are enhanced. The preparation method comprises the steps of ball milling and heat treatment of the main catalyst, addition of the cocatalyst, acid pickling and modification of the carrier, loading and drying of the catalyst and the like. The method has the advantages of high selectivity, good stability, simple process and the like, and is suitable for efficient synthesis of methyl chlorosilane.

The invention relates to the technical field of wastewater filtering treatment, and discloses a cuprous chloride dry-method prepared wastewater treatment device which comprises an outer shell, an inner support is fixedly installed at the bottom of an inner cavity of the outer shell, a plurality of sets of elastic pieces are arranged on the periphery of the inner support, and filter screens are arranged on the outer surfaces of the elastic pieces. A shaft part is arranged at the bottom of the inner cavity of the outer shell, and the middle of the outer surface of the shaft part is in transmission connection with the inner side face of the elastic piece through a connecting rod assembly. According to the treatment device and the treatment method for the wastewater prepared by the cuprous chloride dry method, the shaft part and the connecting rod assembly are arranged, so that when the driving motor is started, the filter screen can be driven to regularly expand outwards or contract inwards under the transmission action of the shaft part and the connecting rod assembly; therefore, the filter screen vibrates and shakes off the solid particles filtered by the filter screen, and the problem that the filter holes in the filter screen are blocked due to the fact that a large number of filtered solid particles are gathered is solved.

The application provides a kind of superfine copper powder and its preparation method and application, the preparation method of the above-mentioned superfine copper powder uses two-step liquid phase reduction method to prepare superfine copper powder, and improves process conditions, using dropwise feeding mode. Among them, the first step uses alkaline ascorbic acid solution to reduce copper chloride to cuprous chloride with narrow particle size distribution; the second step uses ferrous sulfate and sodium citrate as mixed reducing agent, and sodium citrate can also be used as a complexing agent, which helps to reduce the cuprous chloride to spherical, well-dispersed, uniform particle size distribution of superfine copper powder. At the same time, the raw materials used by the application are easy to obtain, the reaction process is mild, and organic solvents and toxic and hazardous reagents such as sodium borohydride and hydrazine hydrate are not needed, the preparation process has cost effectiveness, is friendly to the environment, and is suitable for industrial production.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a modification method of a copper-based catalyst for electro-catalysis carbon dioxide reduction and a product and application of the copper-based catalyst. The modification method comprises the following steps: (1) respectively preparing a first solution containing copper ions and halogen ions and a second solution containing hydroxyl ions; (2) putting the copper-based material into the first solution, reacting, generating a cuprous halide phase on the surface of the copper-based material, and taking out the copper-based material; and (3) putting the copper-based material taken out in the step (2) into the second solution, and reacting to generate cuprous oxide in situ. According to the method, a copper-based material is subjected to a neutralization reaction to generate cuprous chloride, and then a reconstruction reaction is performed to generate cuprous oxide, so that in-situ preparation of the high-adaptability nano cuprous oxide particles is successfully realized, and the cuprous oxide can be used for efficiently reducing carbon dioxide or carbon monoxide into a multi-carbon product; and high selectivity, good structural stability, long-time operation stability and large-current operation capability are realized.

The present invention provides an etching waste liquid recycling and regeneration and cuprous chloride and copper recovery system, wherein the etching waste liquid recycling and regeneration system comprises an acid-base etching waste liquid collecting and neutralizing device, a cuprous chloride filtering and recovering device and an acid-base etching liquid regeneration device which are fixedly connected in sequence, the acid-base etching waste liquid collecting and neutralizing device is respectively connected to the etching waste liquid outlet of the acid etching production line, the etching waste liquid outlet of the alkaline etching production line, and the cuprous chloride filtering and recovering device, the cuprous chloride filtering and recovering device is respectively connected to the acid-base etching liquid regeneration device, the cuprous chloride purification system, and the electrolytic copper recovery system, and the acid-base etching liquid regeneration device is also respectively connected to the acid etching production line and the alkaline etching production line. The beneficial effects of the present invention are: different recycling and regeneration systems of acid-base etching waste liquids are integrated into a set of recycling and regeneration systems, the etching waste liquid recycling and regeneration quality is high, the copper extraction efficiency is high, and the production cost of cuprous chloride is low.

The invention relates to a sterilization liquid agent based on cuprous hydroxide, and also relates to a preparation method and a use method thereof, the suspension of cuprous hydroxide is used as the sterilization liquid agent, and diseases caused by various oomycetes, fungi and / or bacteria can be effectively prevented and treated; wherein the turbid liquid of cuprous hydroxide is obtained by stirring a cuprous chloride coordination compound in a solution state and decomposing the cuprous chloride coordination compound in water. According to the sterilization liquid, the single-time copper dosage is far lower than that of an existing copper ion sterilization agent, and meanwhile the prevention and treatment range of diseases is wider. Therefore, the risk of excessive heavy metal residue caused by the existing copper preparation is solved, and the problem that multiple bactericides need to be used at the same time for preventing and treating one or more diseases is also avoided. The bactericidal liquid provided by the invention has important significance for preventing and treating plant diseases, and has huge application potential in the agricultural market.

The invention provides superfine copper powder and a preparation method and application thereof, according to the preparation method of the superfine copper powder, a two-step liquid phase reduction method is used for preparing the superfine copper powder, process conditions are improved, and a dropwise adding mode is adopted. In the first step, an alkaline ascorbic acid solution is used for reducing copper chloride into cuprous chloride with narrow particle size distribution; in the second step, ferrous sulfate and sodium citrate are used as a mixed reducing agent, meanwhile, sodium citrate can also be used as a complexing agent, and cuprous chloride can be secondarily reduced into the superfine copper powder which is similar to a sphere and is good in dispersity and uniform in particle size distribution. Meanwhile, the used raw materials are easy to obtain, the reaction process is mild, organic solvents and toxic and dangerous reagents such as sodium borohydride and hydrazine hydrate do not need to be used, and the preparation process has cost benefits, is environmentally friendly and is suitable for industrial production.

The invention discloses a ribociclib intermediate preparation method, which comprises: adding a compound (I) into DMSO or DMF, dropwise adding DIEA or triethylamine, and carrying out a ring closing reaction under the action of a catalyst cuprous chloride or cuprous bromide to generate a compound (II); adding the compound (II) into a reaction solvent, controlling the temperature at 70-110 DEG C, adding an oxidant manganese dioxide, carrying out a heat preservation reaction until the raw material disappears, filtering a solid, adding potassium carbonate into a mother solution, controlling the temperature at 0-20 DEG C, dropwise adding hydrogen peroxide, continuously oxidizing until an intermediate disappears, adding water to carry out a quenching reaction, extracting impurities by using an organic solvent, adjusting the pH value of a water phase, separating out the solid, and filtering to obtain a compound (III), one or more of toluene; and finally, the compound (III) generates an intermediate state in a solvent E through a condensing agent CDI or EDCI, after methanol is dropwise added for reaction, water is added for quenching and filtering to obtain a compound (IV), and the solvent E is any one of DMF, tetrahydrofuran and methyl tetrahydrofuran. # imgabs0 #

The invention discloses a special columnar activated carbon catalyst for removing methyl sulfide and a preparation method thereof, and relates to the technical field of adsorption material preparation, and the preparation method comprises the following steps: taking columnar activated carbon as a raw material; soaking with hydrochloric acid, filtering, drying at 150 DEG C, mixing the dried sample with water, carrying out hydrothermal reaction at 80 DEG C for 180 minutes, filtering, and drying to obtain modified activated carbon; cuprous chloride and ammonia water are stirred and mixed to prepare a cuprous diamminechloride solution; and immersing the modified active carbon in a cuprous diamminechloride solution, stirring until the solution is completely absorbed by the active carbon, standing, drying through hot air at 170 DEG C, and adjusting the temperature to 140-160 DEG C when the active carbon is in a boiling state to prepare the impregnated active carbon after calcination and drying.

The invention discloses an Au7Cu10 nanocluster and a preparation method and application thereof.The preparation method comprises the following steps that chloroauric acid and cuprous chloride serve as a gold source and a copper source respectively and are dissolved and stirred in a solvent, 1-adamantanethiol is added, and the color of the solution is changed into dark green from yellow; continuously adding diphenyl-2-pyridine phosphine to enable the color of the solution to be changed from dark green to light orange, continuously adding a mixed solution of sodium borohydride and ice water, and isolating air to enable the color of the solution to be quickly changed into black; and centrifuging to remove a water phase, evaporating an organic phase, washing black precipitate, recrystallizing a crude product at low temperature, and culturing to obtain the Au7Cu10 nanocluster. The Au7Cu10 nanocluster disclosed by the invention shows excellent performance, so that the Au7Cu10 nanocluster has the potential of serving as molecular triplet energy and an electronic substitute in optoelectronics, photocatalysis and solar energy conversion.

The application discloses a synthesis method of 2,3,3',4'-biphenyl tetracarboxylic dianhydride, characterized in that 2,3-dimethylaniline is used as a starting raw material, 2,3-dimethylaniline diazonium salt is prepared through a diazotization reaction, then 2,3,3',4'-tetramethyl biphenyl is prepared through a coupling reaction of the 2,3-dimethylaniline diazonium salt and o-xylene under the catalysis of cuprous chloride, and finally 2,3,3',4'-biphenyl tetracarboxylic dianhydride is prepared through an oxidation reaction and dehydration to form anhydride. The coupling reaction in the synthesis method has good selectivity, 3,3,4',4'-tetramethyl biphenyl which is difficult to separate is not generated, high-purity a-BPDA can be finally obtained, and the coupling reaction in the synthesis method only needs to use low-cost cuprous chloride as a catalyst, so that the production cost is greatly reduced compared to a high-cost catalytic system in the prior art, and the synthesis method is more suitable for industrial mass production.

The application belongs to the technical field of fluorescent probe detection, and discloses a bimetallic nanocluster fluorescent probe compound and application thereof in preparation of a product for rapidly detecting acetylene. The fluorescent probe compound is a gold-copper bimetallic nanocluster solution modified by adamantane thiol, which is used as a fluorescent probe for acetylene detection. The solution has a clear and controllable preparation process. Through specific proportioning and reaction conditions of cuprous chloride, adamantane thiol, tetrachloroauric acid, sodium borohydride and other reagents, a probe solution with stable fluorescence characteristics can be prepared. The bimetallic nanocluster fluorescent probe compound is applied in preparation of a product for rapidly detecting acetylene. Through specific combination of fluorescent molecules and acetylene gas to trigger the secondary effect of fluorescence quenching, detection is realized, and other substances cannot trigger quenching. At a wavelength of 700 nm, the linear relationship (R 2 >0.99) between the fluorescence intensity and the acetylene concentration realizes accurate quantification of the acetylene concentration, and the minimum detection limit is 0.026 muL / L.

The invention relates to the technical field of organic synthesis, and discloses a synthesis method of 2-fluoro-3-bromine-5-chloroaniline, which specifically comprises the following steps: S1, mixing a compound I, hydrochloric acid and cuprous chloride, dropwise adding a sodium nitrite aqueous solution under the stirring condition of 45-55 DEG C, adding water after the reaction is finished, heating for water steaming, and recrystallizing and purifying with ethanol to obtain a compound II; s2, mixing the compound II with sulfuric acid, dropwise adding dibromohydantoin under a stirring condition at 25-30 DEG C, adding water after the reaction is finished, extracting with ethyl acetate, washing with water, layering, desolventizing, and recrystallizing and purifying with ethanol to obtain a compound III; and S3, mixing the compound III, ethanol and a platinum-carbon catalyst, introducing hydrogen while stirring at 70-80 DEG C, filtering after the reaction is finished, desolventizing filtrate to recover ethanol, cooling to separate out a solid, and filtering to obtain a compound IV, namely 2-fluoro-3-bromo-5-chloroaniline. The method is reasonable in design route, short in synthesis route, high in safety coefficient and suitable for industrial production.

The present application relates to a kind of bactericidal liquid agent based on cuprous hydroxide, and its preparation method and use method, with the suspension of cuprous hydroxide as bactericidal liquid agent, can effectively prevent and cure the disease caused by a variety of oomycetes, fungi and / or bacteria, wherein the suspension of cuprous hydroxide is obtained by stirring in water by the solution state cuprous chloride coordination compound decomposition.This bactericidal liquid agent of the present application can be far lower than the existing copper ion bactericide while the single copper dosage is lower, and the prevention and cure range of disease is wider.This not only solves the risk of heavy metal excess residue caused by the existing copper preparation, but also avoids the problem of needing to use multiple bactericides simultaneously to prevent and cure one or more diseases.The bactericidal liquid agent of the present application has important significance for plant disease prevention and cure, and has great application potential in agricultural market.

The invention relates to a method for preparing a 4-chloro-3-nitroanisole compound, in particular to a method for preparing a 4-chloro-3-nitroanisole compound by using a microreactor, which comprises the following steps: carrying out a raw material diazotization reaction by using the microreactor, then carrying out a chlorination reaction in an intermittent tank reactor, and taking 2-methoxy-4-nitroaniline as a raw material to prepare the 4-chloro-3-nitroanisole compound. The 4-chloro-3-nitroanisole compound is prepared from sodium nitrite and cuprous chloride. According to the invention, diazotization of 4-chloro-3-nitroanisole is realized on the micro-reaction device, and the method has the advantages of simple process, continuous production, small reaction volume, short reaction time, small corrosion to equipment, high operation safety and the like. Meanwhile, by utilizing the characteristics of high-efficiency heat mass transfer capacity and easiness in direct amplification of the microchannel reactor, the yield is high and is 80-85%, the product quality is good, the energy consumption is low, and the method is a green, environment-friendly and high-efficiency method for preparing the 4-chloro-3-nitroanisole and is suitable for industrial application.

The invention discloses a preparation method of a CuInS2 / FeS2 wood mildew-proof antibacterial agent, which comprises the following steps: dissolving cuprous chloride, indium chloride tetrahydrate, ferric trichloride hexahydrate and thiourea or thioacetamide in ethylene glycol, and carrying out one-step solvothermal reaction and calcination to obtain a CuInS / FeS composite antibacterial agent; the material has triple effects of photo-thermal, photocatalysis and copper ion slow release, and can inhibit mildew and decay fungi on the surface of wood under the condition of visible-near infrared illumination or no illumination. NH4VO3 and 2-methylimidazole are added into a reaction system and calcined in an ammonia-containing atmosphere, so that a V < 5 + > / V < 4 + > redox pair can be formed on the surface, near-infrared absorption is further widened, electron-hole recombination is delayed, and long-acting antibiosis under weak light is realized. The process is simple, does not contain chromium and arsenic heavy metals, and is suitable for environmental protection of wood materials.

The application discloses a preparation method of refined cuprous chloride, which comprises the following steps: preparing an oxygen-containing copper compound into refined cuprous chloride, wherein the method does not need high-purity copper salt compared with the existing wet process, so that the production cost is low; in addition, the method further introduces a protective agent and a reducing agent to coordinate with each other, so that the product purity is higher than that of the existing process; in addition, the method does not involve waste liquid, and the recovered liquid can be reused, so that the process flow is short, safe and environmentally friendly.

The invention relates to the technical field of lithium battery diaphragms, in particular to nitrogen-containing graphdiyne, a preparation method thereof and application of the nitrogen-containing graphdiyne in a lithium battery diaphragm. The method comprises the following steps: S1, introducing acetylene gas into a cuprous chloride ammonia saturated solution, reacting, filtering, washing and drying to obtain hydrated acetylene copper; s2, mixing acetylene copper hydrate, hexabromo-benzene and tetrakis (triphenylphosphine) palladium, after reaction, dipping, filtering, washing and drying to obtain a solid-phase substance, and then heating the solid-phase substance for reaction under the protection of nitrogen to obtain graphdiyne; s3, grinding and sieving graphdiyne, mixing with melamine, heating to react, washing and drying to obtain the nitrogen-containing graphdiyne. When the nitrogen-containing graphdiyne provided by the invention is applied to a lithium battery diaphragm, a lithium ion battery has a relatively low attenuation rate and a relatively high cycle capacity retention rate.

The application discloses a method for preparing chiral amino alcohol compounds by using water as a hydrogen source and nickel metal as a catalyst. The method comprises the following steps: dissolving a nickel metal catalyst, zinc powder, an additive and a ligand in a dry organic solvent under an inert gas atmosphere; then adding an o-phthalimido ketone compound and water; and reacting at 40-70 DEG C to obtain a target product. The additive is one or more of silver iodide, cuprous bromide, cuprous iodide and cuprous chloride. The ligand is ( S, S p )- t‑ Bu-Phosferrox, S, S p )-Bn-Phosferrox, R, R p )-Ph-Phosferrox or R, R p )- i‑ Pr-Phosferrox. The application uses water as a hydrogen source and nickel metal as a catalyst to catalyze amino ketone compounds to obtain a series of chiral amino alcohol compounds. The method is simple, clean and environmentally friendly, and is suitable for the conventional preparation of chiral amino alcohol compounds.

The invention relates to the technical field of impurity removal and recycling of silicon-containing waste residues, and discloses an impurity removal and utilization method of silicon-containing waste residues in a polycrystalline silicon production process, which comprises the following steps: immersing the silicon-containing waste residues in the polycrystalline silicon production process into a leaching solution containing hydrofluoric acid and copper nitrate, adding hydrogen peroxide, and carrying out a metal-assisted chemical etching reaction, obtaining silicon powder attached with copper; and the silicon powder attached with copper is annealed and then put into a cold hydrogenation reaction. According to the method, the purification of the silicon-containing waste residues and the loading of copper can be realized in one step by utilizing a metal-assisted chemical etching method, and a cuprous chloride catalyst does not need to be additionally added in a subsequent cold hydrogenation process. The silicon powder in the silicon-containing waste residue is recycled, the production cost is reduced, the waste of resources is avoided, and the method conforms to the criterion of harmless treatment.

The invention discloses a method for preparing CuCl cubes with different sizes by adopting a low-temperature liquid phase synthesis method. According to the method, a copper chloride solution is used as a reaction medium, CuCl is used as an oxidizing agent, and the reaction temperature can be controlled to be 25 DEG C. Foamy copper is added into the solution, and the foamy copper serves as a carrier of CuCl and also serves as a reducing agent. A copper source in CuCl comes from two parts, namely a copper chloride solution and foamy copper. CuCl cubes with different sizes can be prepared in a controlled manner by regulating and controlling the reaction time and the reaction temperature. Then, the synthesized cuprous chloride cubes are immediately wiped away with filter paper, finally, the cuprous chloride cubes are dried for 6 h in a drying oven at the temperature of 40 DEG C, and finally the cuprous chloride cubes are stored in the drying oven. The product prepared by the preparation method is high in purity, good in dispersity and good in crystal form and can be synthesized at normal temperature, the generated CuCl is low in cost and good in reproducibility, and the photocurrent density reaches up to 1.27 mA cm <-2 >.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

The application provides a method for preparing bismuth trioxide-cuprous oxide nanocomposite based on a synergistic reaction, which comprises the following steps: dispersing sodium bismuthate, sodium sulfite and cuprous chloride in deionized water to obtain a solid-liquid mixture; and placing the solid-liquid mixture under a hydrothermal condition, so as to in-situ prepare the Bi2O3-Cu2O nanocomposite through the synergistic effect of the redox reaction between sodium bismuthate and sodium sulfite in the system and the anion exchange reaction between cuprous chloride and hydroxyl ions generated in-situ. The application is based on the synergistic effect of the redox reaction and the anion exchange reaction under the same hydrothermal condition, and high-purity Bi2O3-Cu2O nanocomposite can be prepared in-situ in one step without adding an alkali source and a template agent. The prepared composite can effectively form a p-n heterojunction, significantly inhibit the recombination of photo-generated carriers, improve the photocatalytic activity and redox capacity of the material, and the preparation process is simple, green and economical, and easy for industrialized production.

The invention relates to the technical field of waste recycling, and discloses a waste residue treatment device for preparing cuprous chloride through a dry method and an operation method thereof.The waste residue treatment device comprises an acid dissolution tank, a reaction cavity and a cleaning cavity are formed in the acid dissolution tank, a separation base is arranged in the reaction cavity, smooth and arc-shaped faces are arranged on the two sides of the separation base, and the separation base is arranged in the acid dissolution tank; the reaction cavity is divided into two parts by the separation seat, air blowing openings are formed in the two sides of the separation seat, and the positions of the air blowing openings in the two sides are staggered. According to the waste residue treatment device for preparing cuprous chloride by the dry method and the operation method of the waste residue treatment device, waste residues and a solution at the bottom are blown by wind power, so that the solution and the waste residues rapidly flow, the waste residues are always suspended in the solution, are more uniformly distributed in the solution and are in full contact with the solution, and the reaction rate is ensured; through full contact of air with a proper temperature and a solution, local overhigh temperature can be avoided, and the control capability on the temperature can be enhanced, so that the acid dissolution reaction is always kept at the optimal temperature.

The invention discloses a preparation method of sabesartan sodium in the technical field of medicines, which comprises the following steps of: adding cuprous chloride and a catalyst in the SN2 nucleophilic substitution reaction process of 8-chloro ethyl caprylate serving as a raw material and capralan, so that the reaction selectivity and the reaction yield are improved; a sodium hydroxide hydrolysis reaction is carried out, and a reducing agent is added under an anaerobic condition, so that the formation of colored impurities is minimized; and finally salifying with sodium hydroxide in an alcohol solvent to obtain a final product SNAC. The method has the advantages of high efficiency, simplicity, easiness in factory operation, good product appearance, high purity, economical and easily available raw materials and good industrialization prospect.

The invention discloses a method for treating chloride ions in a lithium precipitation mother liquor concentrated solution, which comprises the following steps: adding copper sulfate into an acid-regulated lithium precipitation mother liquor concentrated solution for reaction to obtain a copper chloride-containing lithium precipitation mother liquor concentrated solution; regulating the pH value of the lithium precipitation mother liquor concentrated solution, adding sodium sulfite to precipitate copper chloride in the form of cuprous chloride, and separating to obtain cuprous chloride precipitate and lithium precipitation feed liquid containing residual chlorine and bivalent copper; further concentrating the lithium precipitation feed liquid containing residual chlorine and bivalent copper to obtain concentrated feed liquid; and finally, regulating and controlling the pH value of the concentrated feed liquid, adding sodium sulfite into the concentrated feed liquid to reduce residual bivalent copper into monovalent copper, and adding cuprous chloride precipitate as a guide seed crystal to deeply remove residual chlorine and copper so as to obtain a lithium precipitation liquid.

The invention discloses a preparation method of cyclic conjugated carboxylic ester, and belongs to the technical field of medicine synthesis. The method comprises the following three steps: A, adding N, N '-dicyclohexylcarbodiimide and cuprous chloride into tert-butyl alcohol, and reacting to generate tert-butyl alcohol isourea; b, adding tert-butyl alcohol isourea into the N-protected 7-ACA, and reacting to obtain an intermediate 3a; and C, selectively hydrolyzing the acetic ester, so as to obtain the tert-butyl (6R, 7R)-3-hydroxymethyl-8-oxo-7-(2-phenylacetamide)-5-sulfo-1-azacyclo [4.2. 0] oct-2-ene-2-carboxylic ester. The process can effectively avoid displacement of intracyclic double bonds during carboxyl esterification, the adopted reaction reagent is relatively safe, the operation requirement is low, the equipment requirement is low, operation is easy, and large-scale industrial production is facilitated.

The invention discloses a method for preparing high-purity low-chlorine copper powder by using cupric chloride etching waste liquid as raw material, wherein the acidic cupric chloride etching waste liquid is filtered by a filter, sodium sulfite is added to the obtained filtrate, and cuprous chloride precipitation is obtained after stirring; the cuprous chloride precipitation is washed by adding sulfuric acid, and then pure water is added for washing, and after washing, hot water is added for washing, concentrated ammonia water is added to the obtained filter residue, and the obtained filter residue is stirred and dissolved, copper powder is added to the obtained filtrate, and the obtained filtrate is stirred for reaction and filtered, hydrazine hydrate is added to the obtained filtrate for reaction, and the obtained filter residue is washed and dried in a nitrogen oven; the dried material is placed in a reduction furnace, hydrogen is introduced for reduction, and then after cooling, the material is crushed under a nitrogen gas flow, and then vacuum-packed to obtain high-purity low-chlorine copper powder. The method for preparing high-purity low-chlorine copper powder by using cupric chloride etching waste liquid as raw material can obtain high-purity copper powder with low chlorine and oxygen, low bulk density and high stability.

The invention provides an application of a benzoate compound in a synthesis process of copper phthalocyanine, which comprises the following steps: S1, adding 3g of benzoate compound, 310g of 100% phthalic anhydride, 231g of urea and 1500ml of solvent alkylbenzene into a 3000ml three-neck bottle provided with a stirring device, a thermometer and a condenser, uniformly heating to 170 DEG C within 4 hours while stirring, and keeping the temperature for 2 hours; s2, 231 g of urea is added, the temperature is evenly increased to 190 DEG C within one hour, and heat preservation is conducted for 2 hours; s3, adding 61 g of 100% cuprous chloride and 4 g of 100% ammonium molybdate, uniformly heating to 210 DEG C within 5 hours, carrying out heat preservation and stirring reaction for 6 hours, and cooling to 100 DEG C; according to the application of the benzoate compound in the synthesis process of the copper phthalocyanine, a proper amount of the benzoate compound is added in the synthesis process of the copper phthalocyanine, so that the product yield is increased, the consumption of raw materials is reduced, and the emission of three wastes is reduced, and therefore, the production cost is reduced, and the pollution to the environment is reduced.