44 results about "Copper(I) cyanide" patented technology

The invention relates to a surface treatment method for increasing the conductivity of an aluminum conductive body for a switch cabinet. The problems in the conventional surface treatment of the aluminum conductive body can be effectively solved, the conductive property is improved, and the electric transmission effects can be improved. The surface treatment method comprises the following steps of: firstly, preparing zinc soaking liquid, copper pre-plating liquid and copper plating liquid, wherein the zinc soaking liquid is prepared by dissolving sodium hydroxide in water, adding zinc oxide, heating the mixture until the mixture is entirely dissolved, dissolving ferric trichloride and sodium potassium tartrate tetrahydrate in the water, and adding the water and uniformly mixing after mixing; the copper pre-plating liquid is prepared by dissolving sodium cyanide in the water, adding cuprous cyanide, and adding the water to uniformly mix; and the copper plating liquid is prepared by respectively adding water to dissolve and mix copper pyrophosphate, potassium pyrophosphate and disodium hydrogen phosphate, dissolving amine triacetate with a sodium hydroxide solution, and adding the water after the both are mixed; removing oil of the aluminum conductive body, bleaching the aluminum conductive body, soaking the aluminum conductive body into the zinc soaking liquid for zinc soaking twice, placing the aluminum conductive body in the copper pre-plating liquid for copper pre-plating, washing the aluminum conductive body, and then arranging the aluminum conductive body in the copper plating liquid for copper plating so as to achieve a requested thickness. The surface treatment method provided by the invention is simple, is easy to operate and use, is good in effect, and is safe and environment-friendly. Therefore, the properties of a lead wire are improved.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of 2-nitryl-4-trifluoromethyl benzonitrile. According to the method, 3-nitryl-4-chlorobenzotrifluoride and cyaniding reagents, as raw materials, react with each other under the action of metal bromides and cuprous cyanide to obtain the 2-nitryl-4-trifluoromethyl benzonitrile. The cyaniding reagents are selected from at least one type of ferrous cyanides. The preparation method has the advantages that the metal bromides, which are low in price and easy to get, serve as activating agents, the cuprous cyanide serves as a catalyst, catalysis yield same as nickel bromide can be achieved, and production cost of enterprises can be reduced remarkably; non-toxicity of reaction reagents can be realized through cyanation based on the almost poisonless ferrous cyanides, environment protection requirements can be met, and industrialization can be realized.

The invention relates to a method for harmless treatment of cuprous cyanide, particularly to recovery of copper from waste cuprous cyanide poisonous powder and further harmless treatment of waste liquid. According to the method, collected waste cuprous cyanide powder is wetted with a small amount of clear water; a copper precipitating agent solution is added, and complete stirring is performed; asmall amount of a flocculant is added, and filtration is performed to obtain a copper-containing precipitate and a cyanogen-containing filtrate; and the copper-containing precipitate is washed with asodium hypochlorite solution to remove the residual cyanide, air drying is performed to obtain high-purity copper oxide, the washing liquid and the cyanogen-containing filtrate are treated by using atwo-stage cyanogen breaking technology, and the treated material is conveyed to a wastewater plant, and is further subjected to harmless treatment so as to be achieve standard discharge. According tothe present invention, the method has advantages of simple process flow, safe operation, low environmental pollution risk and high copper recovery rate, can fully utilize the existing equipment and technology of the workshop, and further has good environmental protection benefits and economic benefits.

The invention discloses a preparation method of 3-cyano-4-isopropoxy methyl benzoate. The preparation method comprises the following steps: step I, preparing 3-aldehyde-4-methyl hydroxybenzoate from methyl p-hydroxybenzoate; step II, preparing 3-cyano-4-methyl hydroxybenzoate from the 3-aldehyde-4-methyl hydroxybenzoate; and step III, preparing the 3-cyano-4-isopropoxy methyl benzoate from the 3-cyano-4-methyl hydroxybenzoate. The preparation method of the 3-cyano-4-isopropoxy methyl benzoate provided by the invention has the advantages: (1) the use of cuprous cyanide of highly-toxic cyanide in the previous process is avoided, and the method is more suitable for industrialization; (2) the cyano is prepared from the aldehyde, so that high efficiency and directness can be realized, and mass production can be realized; and (3) all raw materials are cheap and easy to get, and the cost advantage is apparent.

The invention discloses an improved synthesis process for lamotrigine. The process comprises the following steps: (1) synthesizing 2,3-dichlorobenzoyl cyanide: adding 2,3-dichlorobenzoic acid and thionyl chloride into a reactor, carrying out depressurized evaporating to remove thionyl chloride after a reaction is completed, adding cuprous cyanide into the reactor, and filtering out solids after a reaction is completed, so as to obtain a 2,3-dichlorobenzoyl cyanide solution; (2) preparing a condensate: adding aminoguanidine carbonate and an entrainer into a reactor, dropwise adding concentrated sulfuric acid, distilling off the entrainer and water, carrying out suction filtration, enabling solids to enter a reaction bottle, carrying out depressurized pumping, then, adding the 2,3-dichlorobenzoyl cyanide solution obtained in the step (1) into the reaction bottle, cooling the reaction bottle to room temperature after a reaction is completed, and carrying out suction filtration, so as to obtain the condensate; and (3) preparing cyclics: adding liquid alkali into the condensate obtained in the step (2), and carrying out crystallizing, filtering, washing and baking after a reaction, thereby obtaining the lamotrigine. According to the improved synthesis process for the lamotrigine, the quality and yield of the product, i.e., the lamotrigine can be remarkably increased, and the yield reaches 90% or more.

The invention discloses an environmental-friendly preparation method of high-purity cuprous cyanide. The method comprises the following preparation steps: (1) adding a copper wire into a reaction tank, adding an aqueous solution of NaCl, introducing chlorine for a period of time, and reacting to produce NaCuCl2; (2) introducing the NaCuCl2 solution into a precipitation tank, adding a NaCN solutionto obtain a CuCN precipitate, filtering, and returning the filtrate to the reaction tank; (3) scrubbing and washing with a sodium chloride solution, and dewatering, thereby obtaining the product. According to the method disclosed by the invention, the copper wire, industrial chlorine as well as industrial sodium chloride and sodium cyanide serve as raw materials, and due to the steps of chloridizing, precipitating, washing, dewatering and the like, the high-purity cuprous cyanide powder can be obtained, and the highest purity can reach 99.92%.

The invention relates to a preparation method of 1,4-naphthalic acid, which is characterized by comprising the steps of performing Friedel-Crafts reaction on 1-naphthalene bromide serving as an initial raw material and acetyl chloride to generate 4-bromo-1-acetyl naphthalene; then carrying out oxidation by using pypocholoride to obtain 4-bromo-1-naphthoic acid; reacting 4-bromine-1-naphthoic acid with cuprous cyanide in a polar aprotic solvent in the presence of potassium iodide and copper sulfate in catalytic doses to generate a 4-cyano naphthoic acid copper salt complex; and carrying out alkaline hydrolysis on the 4-cyano naphthoic acid copper salt complex to obtain the 1,4-naphthalic acid. According to the preparation method of the naphthalene-1,4-dicarboxylic acid, the raw materials are easy to obtain, and the product does not contain color impurities, is high in purity and good in quality, and can be directly used as an intermediate of a dye, an ultraviolet light absorber, a scintillator and an optical whitening agent for further synthesis.

The invention relates to electroforming liquid for a K gold electroforming process. The electroforming liquid comprises the following main components with one liter of solution as unit: 4-10 g / l of potassium aurous cyanide, 50-100 g / l of cuprous cyanide, 18-35 g / l of free potassium cyanide, 1-50 g of triethanolamine and 1-30 g / l of iminodiacetic acid as auxiliary complexing agents, 0.2-4 g / l of zinc sulfate as hardening agents, 10-30 g / l of dipotassium phosphate as buffering agents; the electroforming liquid for the K gold electroforming process is prepared through the components, and K gold products are electroformed; K gold is prepared through a gold and copper binary alloy electroforming process; the K gold electroforming liquid with stable performances is used for preparing hollow K gold products with low weights, high hardness, bright rose gold colors and bright and smooth surfaces; and the products have the advantages of low gold consumption, durability, three-dimensional and full shapes and low cost.

The invention discloses a method for preparing cuprous cyanide by using high-concentration cyanogen-containing wastewater. The method comprises the following preparation steps: preparing Cu<+>; performing CuCN synthesis reaction; adjusting PH; soaking with concentrated sulfuric acid, washing with water, filtering and dehydrating. The Cu<+> is prepared by a reduction method and is added into high-concentration cyanogen-containing wastewater to form cuprous cyanide precipitate, adjusting the PH value of inorganic acid to continuously reduce the cyanogens content of filtrate, and through a seriesof chemical processes, the purity of the cuprous cyanide is continuously improved and the highest purity is 98.92 percent.

The invention discloses a method for synthesizing N-aryl-phenoxazine compounds, and belongs to the chemical synthesis filed. The method comprises the following steps: taking a compound represented by the formula I, which is shown in the description, as the raw materials; mixing the compound with a solvent, a catalyst, and an alkali reagent, adding an arylation agent, and carrying out reactions at a temperature of 50 to 250 DEG C so as to obtain the target product; wherein the solvent is amides, benzenes, or nitriles; the catalyst is copper halide, cuprous halide, alkyl copper carboxylate, alkyl copper carboxylate hydrate, aryl copper carboxylate, cuprous oxide, or cuprous cyanide; and the arylation agent is iodobenzenes represented by formula II, which is shown in the description, mono-substituted iodopyridine, or 3-iodothiophene. The method has the advantages of simple reaction steps and high yield of target product.

The invention discloses a preparation method of methyl 2,2-difluorobenzo[d][1,3]dioxole-5-carboxylate. The method comprises the steps of performing cyanation reaction to 5-bromo-2,2-difluoro-1,3-benzodioxole and cuprous cyanide, then performing hydrolysis to form acid, and then performing esterification to obtain 2,2-difluorobenzo[d][1,3]dioxole-5-carboxylate. In the preparation method disclosed by the invention, by using 5-bromo-2,2-difluoro-1,3-benzodioxole as a start raw material, performing cyanation by using low-toxicity cuprous cyanide, then performing hydrolysis to form acid and performing methanol reaction esterification to obtain the product, the process flow of the method is simple and the reaction process is easy to control. In the reaction process, the purification of the intermediate product produced in each step does not need a complex purification process, the purification process is simple, the purification yield is high, the entire process flow is simple and high-efficiency, the product yield is high, the cost of the entire flow is low and the preparation method is very suitable for large-scale industrial production.