131 results about "Cyanogen" patented technology

The invention belongs to the technical field of sewage treatment, and particularly relates to a coking phenol-cyanogen sewage treatment system, which comprises a pretreatment stage, a biochemical treatment stage and an advanced treatment stage, a mixing cavity, a flotation cavity, a separation cavity, a scum cavity and a clear water cavity are sequentially formed in the air flotation tank; the scraping plate is movably connected to the upper part of the separation cavity and is used for scraping dross; the recovery valve pipe is arranged below the clear water cavity, and a concentration sensor is arranged in the recovery valve pipe and used for detecting the impurity concentration in the clear water; according to the coking phenol-cyanogen sewage treatment system, the scraping depth of the scraping plate is correspondingly adjusted according to the concentration value of the impurities at the clear water, and the larger the amount of scum in the separation cavity is, the larger the downward moving speed of the corresponding scraping plate is, so that the scum in the separation cavity can be thoroughly and effectively scraped and recycled by the scraping plate.

The invention provides electroplating liquid, an electroplating method, an alloy bump and a preparation method of the alloy bump. The electroplating solution comprises the following components with mass concentration: 5-20 g / L of water-soluble cyanogen-containing gold salt, 1-15 g / L of water-soluble silver-containing salt, 0.5-5 g / L of cobalt citrate, 1-10 g / L of a refiner, 20-100 g / L of conductive salt, 10-90 g / L of a compound complexing agent and the balance of deionized water. The refining agent is selected from one or more of sodium lignin sulfonate, 5-nitroguaiacol sodium salt, sodium carboxymethyl cellulose and sodium alginate. Cobalt citrate and a specific substance are selected as refiners, so that the prepared gold-silver alloy bump is high in hardness and low in surface roughness; and through matching of the complexing agent, the antioxidant and the stabilizer, the oxidation resistance and the stability of the electroplating liquid are greatly improved, and the service life is prolonged.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of N, N '-bis (2-bromine / chloroethyl) diamino phosphonic acid (1-methyl-4-nitro-1H-imidazole-2-cyanogen) methyl ester, 4-methylimidazole is used as a raw material, and (1-methyl-4-nitro-1H-imidazole-2-cyanogen) methanol is synthesized through nitration, methyl substitution, bromine substitution, bromomethyl substitution, hydrolysis and substitution; the preparation method comprises the following steps: reacting phosphorus oxychloride with ethyl amine salt to synthesize N, N '-bis (2-bromoethyl) diamino phosphonic acid and N, N'-bis (2-chloroethyl) diamino phosphonic acid, and finally condensing to obtain N, N '-bis (2-bromoethyl) diamino phosphonic acid (1-methyl-4-nitro-1H-imidazole-2-cyanogen) methyl ester and N, N'-bis (2-chloroethyl) diamino phosphonic acid (1-methyl-4-nitro-1H-imidazole-2-cyanogen) methyl ester. The compound can selectively inhibit ovarian cancer cell proliferation under a hypoxia condition.

The utility model discloses a thermal hydrolysis cyanide breaking device, which relates to the technical field of wastewater treatment and comprises a cyanide breaking reactor, a wastewater heat exchanger, a pipeline mixer, a steam mixer, an instrument control valve and the like. After being heated by the wastewater heat exchanger, the wastewater enters a cyanide breaking reactor, and steam enters a steam mixer to heat the wastewater to a specified temperature and then enters the cyanide breaking reactor. The characteristic that the cyanide aqueous solution is easy to hydrolyze is utilized, so that the cyanide aqueous solution is hydrolyzed at the temperature of higher than 140 DEG C to produce sodium formate and ammonia, the toxicity of cyanide is eliminated, high-temperature wastewater discharged from the cyanide breaking reactor enters the wastewater heat exchanger to exchange heat with wastewater to be treated, and heat is recovered; the pressure of the reactor is controlled through a wastewater heat exchanger outlet wastewater outlet pipeline pressure regulating valve. The cyanide wastewater treatment device is reasonable in design, only a small amount of sodium hydroxide is needed for adjusting the pH of wastewater, no chemical agent needs to be added in other procedures, the cyanide wastewater treatment efficiency is improved, and the cost is saved.

The invention provides a method for recycling valuable substances and cyanide in cyanide-containing wastewater, and belongs to the technical field of cyanide-containing wastewater treatment. The method comprises the following steps: firstly, carrying out replacement reaction on a physicochemical material (reducing substance zinc) and a copper-cyanogen complex in the cyanogen-containing wastewater to displace copper, and filtering to obtain filter residues containing zinc and copper, so as to realize copper recovery; in the replacement reaction, the copper-cyanogen complex in the filtrate is converted into a zinc-cyanogen complex with a lower stability constant, and then the zinc in the filtrate is recycled by diaphragm electrolysis. The method specifically comprises the following steps: dividing an electrolytic cell into a cathode region and an anode region by utilizing a membrane material, and enabling electrode reactions to be independently carried out, so that cyanide is prevented from entering the anode region to generate electrochemical oxidation and the decomposition of the cyanide is inhibited, and the cyanide is recycled in a solution for cyclic utilization; and then an alkali-resistant titanium-based coating electrode is used as an anode plate, a porous material is used as a cathode plate, recovery of zinc on the cathode plate is promoted, and recovery of valuable metal zinc and copper and cyclic utilization of cyanide are achieved.

The invention discloses a catalyst for simultaneously removing cyanide and organic matters in wastewater by a peroxymonosulfate oxidation method as well as a preparation method and application of the catalyst, and belongs to the field of chemistry and chemical engineering, in particular to the technical field of catalyst preparation. According to the preparation method, metal oxides such as molybdenum, cerium, vanadium and the like are introduced as a substrate, precise doping of cobalt and nickel and loading of noble metal nanoparticles are performed, and the structural stability and the anti-sintering capability of the catalyst are enhanced through surface modification while uniform distribution of metal elements is ensured, and efficient performance is kept for a long time under high-temperature complex reaction conditions; the catalyst prepared by the method is applied to simultaneous removal of cyanides (free cyanogens and complex cyanogens) and organic matters in wastewater by a peroxymonosulfate oxidation method, has excellent catalytic activity, can quickly reach the degradation rate of 90% or above for 100pmm cyanides (free cyanogens and complex cyanogens) and 200mg / LCOD organic matters in wastewater, and has excellent degradation effect and reaction rate.

The invention discloses a pretreatment method and system for sulfur-containing and arsenic-containing ore. The method comprises the steps of crushing, alkaline wet ore grinding, strong alkaline pre-oxidation, cyanidation leaching, cyanogen removal treatment and high alkaline flotation. In the pretreatment process, liquid caustic soda is added into an ore grinding system, and oxygen is introduced into a cyanidation serial stirring tank for pre-oxidation treatment, so that the oxidation activation effect of the arsenic-sulfur minerals is remarkably enhanced, and the gold release efficiency and the cyanidation leaching rate are improved. The same group of serially connected stirring tanks is adopted for pre-oxidation and cyanidation leaching, and the first three stirring tanks are used for pre-oxidation and subsequently communicated with the stirring tanks for cyanidation reaction, so that process integration and equipment reuse are realized. Experimental results show that the comprehensive recovery rate of gold can be remarkably increased, the agent consumption can be reduced, and the method has good industrial application value.

The invention discloses a method for removing thiocyanate radicals in cyanide-containing wastewater, and belongs to the technical field of metal refining. The method comprises the following steps: adding concentrated sulfuric acid to adjust the pH value of cyanogen-containing wastewater to 2-3, carrying out a stirring reaction, filtering, adding sodium hydrosulfite into a filtrate, simultaneously adding concentrated sulfuric acid to maintain the pH value to 3-5, carrying out a stirring reaction, firstly introducing a sodium sulfite acidic solution into overflowed H2S and HCN gas to absorb H2S gas, and then introducing a sodium hydroxide strong alkaline solution to absorb HCN gas. Aiming at cyanide-containing wastewater subjected to acidification treatment, firstly, a strong reducing agent sodium hydrosulfite is added to reduce SCN <-> into H2S and HCN with recycling value, then H2S is absorbed, elemental sulfur is recovered, finally HCN is absorbed, CN <-> is recovered, and the method is used for cyaniding gold extraction of a gold leaching system. The absorption and separation of H2S and HCN gas are realized, the recovery of elemental sulfur and CN <-> is further realized, and other ions are not introduced into a water supply system.

The embodiment of the invention relates to the photovoltaic field, and provides a cyanide-free electroplating silver-coated copper conductive material, a preparation method thereof and a crystalline silicon solar cell. The silver-coated copper electrode provided by the embodiment of the invention comprises a copper core and a copper-tin alloy electroplated layer coated on the surface of the copper core, the surface of the pre-plating material is coated with the silver electroplating layer; the surface of the silver-coated copper material is coated with the self-repairing layer; wherein the self-repairing layer comprises a resin film and a pH response type microcapsule, the microcapsule is embedded in the resin film, and the microcapsule is filled with an ammonium molybdate corrosion inhibitor. The copper-silver interface bonding force can be improved through the copper-tin alloy electroplated layer, and the silver layer material does not contain cyanogen and is environmentally friendly; the corrosion inhibitor in the pH response type microcapsule in the self-repairing film layer on the surface of the silver layer is released under a specific pH condition to form a protection film on the silver layer again, so that the self-repairing purpose is achieved, and the dynamic protection effect is achieved.

The invention relates to an efficient copper removal and recycling process for copper-cyanogen complex wastewater, which comprises the following steps: (1) critical acidification-selective crystallization of the copper-cyanogen complex wastewater: directionally recombining a copper-cyanogen complex to generate insoluble CuCN crystals by accurately regulating and controlling the pH value of the wastewater; (2) rotational flow enhanced crystallization: separating CuCN crystals from overflow liquid through a hydrocyclone; (3) gradient activation of a composite vulcanizing agent for deep copper removal: enabling the fine CuCN particles and the dissolved-state low-coordination copper-cyanogen complex to react to generate insoluble CuS crystals by adjusting the pH value and adding the composite vulcanizing agent; and (4) magnetic seed enhanced separation: carrying out magnetic separation by adopting modified magnetic seeds and a low-intensity magnetic separator, separating CuS magnetic flocs from the wastewater, and finally obtaining purified tail liquid. According to the closed-loop process, copper in the copper-cyanogen complex wastewater can be efficiently removed and recovered, the purified tail liquid can be reused for cyanidation leaching operation, the unit consumption of sodium cyanide is remarkably reduced, the leaching rate of gold and silver is increased, and zero discharge of wastewater and full recovery of copper resources are truly achieved.

The invention relates to a lithium ion electrolyte and a battery, and belongs to the technical field of lithium ion batteries. The lithium ion electrolyte comprises a lithium salt, an organic solvent and a first additive, wherein the organic solvent comprises a first solvent, and the first solvent is selected from carbonic ester compounds substituted by hydrogen, C1-C5 alkyl, phenyl and tolyl; the first additive is selected from hydrogen, fluorine and cyano-substituted nitrile fluorobenzene compounds; in percentage by mass, the content of the first additive in the electrolyte is b% and is smaller than or equal to blt; 5. By adopting a specific type of electrolyte solvent and additive combination, the stability of an electrolyte-positive electrode / negative electrode interface can be improved, the high-temperature performance of the LCO-Gr system lithium ion battery under high voltage is remarkably improved, and the high-temperature cycle performance, the standing cycle performance, the high-temperature storage performance and the like are improved.

The invention provides an up-to-standard treatment method for wastewater containing ammonia nitrogen and difficult-to-treat copper-cyanogen, and belongs to the field of wastewater treatment.The wastewater enters a first-stage oxidation reactor at first, the stable structure of a copper-cyanogen complex is destroyed by adding an oxidizing agent, then a copper removal agent and a pH adjusting agent are added into a copper removal reactor, copper ions are precipitated and separated out, and then the wastewater enters a second-stage oxidation reactor; the method comprises the following steps: carrying out oxidation and solid-liquid separation to remove copper sludge, carrying out oxidation and solid-liquid separation on treated overflow liquid and press filtrate after convergence so as to thoroughly remove residual cyanide and organic matters, and finally, conveying purified liquid which is subjected to two-stage oxidation and is subjected to copper cyanide interference removal to a biological reaction system to carry out biochemical reaction. And finally, the effluent reaches the recycling or discharging standard. The method effectively solves the problem of toxicity inhibition of difficult-to-treat wastewater on a biochemical system, realizes step-by-step removal and resource utilization of toxic and harmful substances, ensures stable and up-to-standard reuse or discharge of effluent, and has the advantages of efficient treatment, economy, environmental protection and convenient operation.

The invention discloses a coking phenol-cyanogen wastewater refrigeration system and method, the refrigeration system comprises a wastewater buffer pool, a heat exchanger, a cooling-water machine, a cooling tower and a chilled water buffer pool, and the above structures are connected through pipelines to form a wastewater circulation loop, a chilled water circulation loop and a cooling water circulation loop. The temperature of the coking phenol-cyanogen wastewater is accurately controlled through the synergistic effect of the three circulation loops, the temperature of the wastewater cooled by the heat exchanger can be stably controlled at 25-30 DEG C (the optimum survival interval of microorganisms), the problem of microorganism inactivation caused by the fact that the high-temperature wastewater directly enters a biochemical pool is avoided, and the biochemical treatment efficiency is improved.

The invention belongs to the technical field of coatings, and particularly relates to a waterproof and anticorrosive two-component cyanogen setting composite coating and a preparation method thereof. Comprising the following steps: preparing anti-corrosion functional alcohol ether; a dynamic hydrophobic migration microsphere filler; carrying out hydrophilic modification on isocyanate; and blending prepolymers. In the preparation process of preparing the dynamic hydrophobic migration microspheres and then adding the waterproof and anticorrosive bi-component cyanogen setting composite coating, the composite coating has stable dispersity and can form a uniform phase, and in the process of heating and curing after coating, hydrophobic components can be released to migrate to the surface of the coating, so that the waterproof and anticorrosive bi-component cyanogen setting composite coating is formed. Therefore, a hydrophobic layer is formed on the surface, the waterproof performance of the coating after film formation is improved, substances in the inner layer can react better, and the adhesive force of the coating is enhanced.

The application discloses a kind of hydrolysis-resistant acetylacetamide modified polyvinyl alcohol and preparation method thereof, and the preparation method comprises the following steps: double vinyl ketone and first and alcohol amine compound are reacted to generate N-(hydroxyalkyl) acetylacetamide intermediate;Then trichloro cyanogen and N-(hydroxyalkyl) acetylacetamide intermediate are reacted to generate 3,5-bis[acetylacetamide alkoxyl] monochloro s-triazine;Finally, 3,5-bis[acetylacetamide alkoxyl] monochloro s-triazine is reacted with PVA in polar solvent to generate AAM-PVA.The AAM-PVA prepared in the application can be used as a protective colloid for polyvinyl acetate emulsion polymerization, and the prepared emulsion adhesive has obvious improvement in water resistance, tensile strength and stability;The raw materials of the application are cheap and easy to obtain, the preparation process is simple, the reaction conditions are mild, and there is no waste water and waste gas emission.

The utility model provides a biomass methanol sewage treatment device which comprises the following steps: S1, gasification wastewater, ground flushing water, methanol rectification wastewater, test wastewater and domestic sewage are generated in a biomass methanol production process; carrying out oil removal, two-stage air flotation reaction, deamination reaction, coagulation cyanogen breaking and Fenton pre-oxidation treatment on the gasified wastewater to obtain pretreated gasified wastewater; s2, performing comprehensive treatment on the ground flushing water, the methanol rectification wastewater, the test wastewater, the domestic sewage and the pretreated gasification wastewater. The biomass methanol wastewater treatment system has the beneficial effects that the high-concentration gasified wastewater is pretreated by adopting classified and quality-divided treatment, the pretreated wastewater is biodegradable wastewater, and a comprehensive treatment process which mainly adopts biochemical treatment and is high-grade oxidation security is adopted, so that the treatment cost of the biomass methanol wastewater is reduced, and the effluent is ensured to reach the emission standard of pollutants in the petrochemical industry.

The utility model discloses a low-cost device for treating high-concentration cyanide-containing wastewater, which comprises a first wastewater delivery pump (1), a primary reaction tank (4), a secondary reaction tank (6), a regulating tank (7) and a second wastewater delivery pump (8) which are sequentially connected, the primary reaction tank (4) is connected with a special cyanide breaking device (2) through a pipeline, and the regulating tank (7) is connected with a NaOH solution storage tank (3) through a pipeline. According to the method disclosed by the utility model, the oxidizing agent is prepared by adopting the special cyanide breaking device, the strong oxidizing property of the oxidizing agent is utilized, the cyanide breaking reaction is carried out on the high-concentration cyanide-containing wastewater treatment device, and the wastewater can stably reach the standard without adjusting the pH value of the wastewater on the basis of not changing the original treatment device.

The invention relates to the technical field of building construction, and discloses a cold-bridge-prevention thermal insulation construction method for a wall body of a refrigeration house, which comprises the following steps of: pre-treating a wall surface before construction, then directly spraying cyanogen condensate on the treated wall surface on the cleaned wall surface, and designing and installing wood and T-shaped piles in order to enable the cyanogen condensate to fully permeate into a base layer. Then, a steel row gun is used for installing the wall surface, polyurethane foaming spraying construction is conducted after installation, the thickness of foam sprayed in a single layer is conducted for the first time, an anti-crack fiber net is hung and a transverse cork wood keel is installed when the foam is sprayed to be half of the design thickness, a polyurethane heat preservation layer is sprayed to be the design thickness, and after polyurethane spraying foaming finishing is completed, the position of a door and window opening is located at the position of a door and window opening; and wall surface heat preservation and color steel plate construction are completed. By the adoption of the double-layer spraying cyanogen condensation waterproof vapor-proof layer, effective moisture prevention and air tightness are achieved, the effect of greatly reducing moisture permeation in the refrigeration house is achieved, formation of a cold bridge is avoided, and the energy-saving effect of the refrigeration house is improved.

The invention discloses a nitrile rubber production sewage treatment process and device, and belongs to the technical field of synthetic rubber sewage treatment. According to the technical scheme, the sewage treatment device comprises a homogenizing tank, a two-stage air floatation tank, a high-density sedimentation tank I, a nitrile removal and cyanide breaking unit, an adsorption sedimentation tank, a hydrolysis acidification tank, a denitrification tank, an aeration tank, a secondary sedimentation tank, a denitrification filter tank, an engineering bacterium biological filter tank and a sedimentation filter tank which are sequentially connected through pipelines; the sewage treatment process comprises the following steps: 1) pretreating glue-containing sewage; the invention provides a nitrile-butadiene rubber production device sewage treatment method, which comprises the following steps of 1) nitrile removal and cyanogen breaking treatment, 3) biochemical treatment, and 4) sewage up-to-standard deep treatment.The nitrile-butadiene rubber production device sewage treatment method is safe and reliable in operation, can perform efficient denitrification and decarbonization treatment on all sewage in a nitrile-butadiene rubber production device area, enables the discharged sewage to reach the GB31571-2015 direct discharge standard, provides a tail gas discharge treatment scheme, and radically solves the problem of environmental pollution.

The utility model discloses continuous efficient cooling equipment for cyanogen diester production, which comprises a jacketed reaction kettle and a cooling bin, the cooling bin is arranged on one side of the jacketed reaction kettle, an upper flow guide channel and a lower flow guide channel are symmetrically arranged in the cooling bin in the vertical direction, and the upper flow guide channel is communicated with the lower flow guide channel. The utility model relates to the technical field of cyanogen diester production cooling equipment, an existing jacket type reaction kettle is improved, a cooling bin is arranged on one side of the jacket type reaction kettle, the cooling bin is arranged on the other side of the jacket type reaction kettle, and a vertical multi-channel spiral heat exchange assembly is connected between the upper flow guide channel and the lower flow guide channel. A plurality of groups of parallel vertical multi-channel spiral heat exchange assemblies are arranged in the cooling bin, a reaction mixture in the reaction kettle is injected through a lower flow guide channel by utilizing a liquid guide pump and ascends along the vertical multi-channel spiral heat exchange assemblies, and the reaction mixture exchanges heat with low-temperature cooling liquid in the cooling bin for cooling in the process; and the cooled reaction mixture flows back into the reaction kettle.

The application discloses the use of carbon cyanogen - 4 trifluoromethoxy benzyl hydrazone in the prevention and treatment of candida infection, belonging to the technical field of candida infection prevention and treatment. Carbon cyanogen - 4 trifluoromethoxy benzyl hydrazone is used as the only active ingredient for preparing a medicine for preventing or treating diseases caused by candida infection, wherein the candida is candida albicans and / or candida auris; or it is used for preparing a bacteriostatic and / or bactericidal product of candida, wherein the candida is candida albicans and / or candida auris. FCCP shows good inhibition of strain growth, good inhibition of biofilm effect and good mitochondria breaking effect in the antibacterial experiments of various candida (wild type candida albicans, drug resistant candida albicans and drug resistant candida auris). Thus, a new treatment drug for candida albicans and candida auris infection is provided.

The invention relates to the field of polyacrylate photoresists, in particular to a photoresist film-forming resin raw material and a preparation method thereof.The preparation method comprises the steps that cyclopentadiene is dropwise added into a mixed solution of alpha-bromomethyl acrylate and a solvent, the temperature is controlled, a reaction is conducted for 4 h, and 5-bromodicyclohept-2-ene-5-carboxylic acid methyl ester is prepared; the preparation method comprises the following steps: adding alkali into 5-bromo dicycloheptyl-2-ene-5-carboxylic acid methyl ester, and hydrolyzing at 20-30 DEG C for 2 hours to obtain a hydrolysis product; the hydrolysis product is subjected to epoxidation and hydrolysis with hydrogen peroxide under the condition of glacial acetic acid, and 1-bromine-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is obtained; according to the method, 1-bromo-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is cyanided by cuprous cyanide to prepare the 1-cyano-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone monomer, and the method has the advantages that the raw materials are convenient and easy to obtain, the route is short, the reaction conditions are relatively mild, the operation safety is relatively high, the total yield is remarkably improved, and the like.

The utility model relates to the technical field of cyanogen-containing waste gas incinerators, in particular to a lining structure of a cyanogen-containing waste gas incinerator. The lining structure of the cyanide-containing waste gas incinerator comprises a furnace wall shell, a heat insulation layer is arranged on the inner side of the furnace wall shell, a wear-resistant fireproof layer is arranged on the inner side of the heat insulation layer, and Y-shaped anchoring nails and C-shaped buckles are connected to the furnace wall shell. According to the structure, through the arrangement of the Y-shaped anchoring nails, the integrity and grabbing force of the lining structure are greatly enhanced, and the thermal shock resistance of the lining is improved; the C-shaped buckles and the corundum mullite anchoring bricks are used in cooperation, the anchoring bricks are embedded in the castable, when the lining is subjected to stress and cracks occur, the cracks are interrupted, and the lining is prevented from falling off.

The invention discloses a preparation method of a photocatalytic silicon-containing 1.1-diaryl compound, which realizes that olefin simultaneously reacts with aromatic cyanide and a silicon-boron compound to generate a silicon arylation product of olefin in the presence of photocatalysis and alkali. And reducing the aromatic cyanogen compound through a photocatalyst to generate aromatic cyanogen anion free radicals and an oxidation state. Then the alkali-silicon-boron complex is subjected to photocatalytic oxidation in an oxidation state, catalytic regeneration and cation free radicals of the alkali-silicon-boron complex are achieved, then silicon-boron bonds in the cation free radicals of the alkali-silicon-boron complex are broken to generate silicon free radicals, and the silicon free radicals and olefin are subjected to addition to generate alkyl free radicals; and finally, coupling the generated alkyl free radical with the aromatic cyanide anion free radical to generate the target olefin silicon arylation product. According to the invention, the aryl group and the silicon free radical are introduced into olefin at the same time, and are used for post-modification application of natural products and drug derivatives, and the method has the value of developing functional compounds which can be used for industrial synthesis and contain silicon groups and aryl groups.

The invention relates to an efficient preparation method and application of optically pure beta-cyanone. The invention belongs to the technical field of fine chemical synthesis. The invention aims to solve the technical problems of low yield, long reaction time, harsh reaction conditions and unsuitability for industrial production of the existing method for preparing optically pure beta-cyanone through asymmetric conjugate cyanidation addition reaction. According to the method, an alpha, beta-unsaturated carbonyl compound is taken as a substrate, acetone cyanohydrin is taken as a cyanogen source, and under the action of a cinchona alkali derivative, alkali and an additive, the optically pure beta-cyanoketone is prepared by heating in a nitrogen atmosphere in one step without tedious operation. By screening cinchona alkaloid derivatives, alkali, additives, reaction temperature and reaction solvents and coordinating and controlling the optimal proportion of all the substances, side reactions are inhibited to the maximum extent, beta-cyanoketone is obtained with high stereoselectivity and yield, and possibility is provided for industrial production of optically pure beta-cyanoketone. The method is mild in condition, simple in operation process, short in reaction time and environmentally friendly, acetone cyanohydrin serves as a cyanogen source, substances such as highly toxic sodium cyanide, TMSCN low in atom utilization rate and high in price are replaced, the application range of a substrate is good, and the method can be widely applied to the fields of biochemistry and medicinal chemistry.

The invention discloses a natural ventilation cooling tower inner wall corrosion prevention method adaptive to an extreme temperature difference environment, and belongs to the technical field of cooling tower corrosion prevention. Comprising the steps that leakage treatment is conducted, specifically, according to cracks, honeycomb-shaped defects and holes in the inner wall of the cooling tower, drilling is conducted by adopting drilling parameters matched with the extreme temperature difference, after a grouting water stop needle is embedded, a corresponding grouting material is injected according to the dry and wet state of a leakage part, after grouting is completed, preset time is observed, and after it is confirmed that no leakage exists, the grouting needle is cut off, and a needle hole is plugged; the exposed ribs on the inner wall of the cooling tower are subjected to rust removal, a cracked and warped concrete protection layer and loose concrete are chiseled away, the concrete missing position is repaired with anti-crack mortar, and the water content of the inner wall is controlled to be smaller than or equal to 8% by flushing a cylinder body for standby application; and anti-corrosion coating is conducted, specifically, the surface of the treated base layer is sequentially coated with cyanogen setting permeable seal primer, cyanogen setting intermediate paint and cyanogen setting waterproof and anti-corrosion finish paint.

The utility model discloses combined stirring equipment for cyanogen diester production, which comprises a reaction kettle, a processing bracket, a stirring gear box, a stirring driver and a stirring shaft tube, and relates to the technical field of cyanogen diester production, the stirring gear box and the stirring shaft tube are driven by the stirring driver to further drive a rotary stirring pin and a stirring lifting shaft rod, and the stirring lifting shaft rod is driven by the stirring driver to rotate. According to the reaction kettle, lifting and dead-corner-free stirring of the stirring blades in the reaction kettle are realized, the design can ensure that materials are uniformly mixed in the reaction kettle, the production efficiency and the product quality are improved, and the raw materials can be automatically drained to the inner side of the circular ring feeding pipe from the raw material box one by one through the design of the shunting feeding pipe and the S-shaped drainage pipe; and then uniform feeding is conducted through the transfer siphon and the L-shaped feeding pipe, manual intervention is reduced through the automatic flow dividing and feeding system, and the production efficiency is improved.

The invention belongs to the technical field of organic electroluminescent materials, and provides an electron transport material for an organic electroluminescent device and a preparation method of the electron transport material. The 9-alkyl-9-cyanogen-substituted aryl (or cyanogen-substituted nitrogen-containing heteroaryl) fluorene group with a substituent group enables the molecular structure to be twisted and the intermolecular interaction force to be weakened, cyanogen and pyridine enable the compound to have the electron-withdrawing property, electron transmission is facilitated, compounding of electrons and holes in a light-emitting layer is enhanced, and the light-emitting efficiency is improved. Aryl bridged triazine and pyrimidine six-membered nitrogen heterocycle are used for further improving the transmission performance of electrons, and as an electron transmission layer material of the organic electroluminescent device, the organic electroluminescent device has the characteristics of low driving voltage, high luminous efficiency and long service life.

The utility model discloses a small-diameter cyanuric chloride material pipe, which relates to the technical field of cyanuric chloride production and comprises a material pipe, sealing end plates are arranged at the left end and the right end of the outer surface of the material pipe, and a heat conduction oil pipe is arranged between the two sealing end plates. The outer edges of the two sealing end plates extend out of the heat conduction oil pipe to be provided with connecting edges, limiting end plates are arranged on the outer sides of the outer surfaces of the two sealing end plates, and a heat preservation pipe is arranged between the outer edges of the two limiting end plates. A heat preservation material is arranged between the heat preservation pipe and the heat conduction oil pipe and between the two limiting end plates, a punching partition plate is arranged in the middle of the front side and the rear side between the material pipe and the heat conduction oil pipe, the flow speed of a solution in the pipeline is increased, the temperature of the material pipe is increased, and the temperature of cyanuric chloride materials in the material pipe is increased; the crystallization of cyanuric chloride in the material pipe due to the characteristics of cyanuric chloride is reduced, and the blockage condition of the material pipe is reduced.

The invention discloses a nano-channel based on Pd-Co cyanogen gel nano-enzyme, a preparation method and application of the nano-channel in glucose detection, and belongs to the technical field of biosensors. The nano-channel based on Pd-Co cyanogen glue nano-enzyme is a TiO2 nano-channel (TiNM) with two open ends, the two open ends are a large opening end and a small opening end respectively, metal organic frameworks (MOFs) are grown in situ in the TiNM through a biomimetic mineralization method to immobilize Pd-Co cyanogen glue nano-enzyme molecules, and a metal organic framework composite nano-enzyme structure is formed. Meanwhile, the end face of the small opening end is coated with a pH response polymer to form a gating structure. Glucose generates gluconic acid and hydrogen peroxide under catalysis of Pd-Co cyanogen gel nano-enzyme, the pH change in the channel is triggered, and the pH response polymer is dissolved, so that the gating structure is activated to be opened. The sensor is used for glucose detection, has relatively high selectivity and relatively strong anti-interference capability on glucose, and has good repeatability and operation stability.