232 results about "Cyanide compound" patented technology

The invention provides a non-ferrous metal recovery method and an aluminum electrolyte carbon residue comprehensive utilization process, and relates to the technical field of metal recovery and utilization. A non-ferrous metal recycling method comprises the following steps that S1, pretreatment of raw materials is conducted, specifically, aluminum electrolyte is crushed and screened through a crusher to prepare carbon residue powder, the carbon residue powder and an alkaline compound are mixed according to the mass ratio and then put into a muffle furnace to be roasted, fluoride is converted into calcium fluoride, cyanide is converted into calcium cyanate, and roasted residues are generated; and S2, leaching treatment is conducted, specifically, the roasting slag in the step S1 is put into a constant-temperature water bath pot through a sulfuric acid solution to be leached. According to the scheme, enrichment of valuable metals such as aluminum and lithium can be finally achieved by leaching the roasting slag through sulfuric acid, impurities such as iron and aluminum are accurately separated from the leachate through a fractional precipitation method, calcium ions are selectively precipitated through oxalic acid, a high-purity lithium solution is finally obtained, a battery-grade lithium carbonate product is prepared after lithium precipitation, effective recovery and utilization of non-ferrous metals are achieved, and the method is suitable for industrial production. The energy is saved.

To provide a method for producing a urethane bond-containing polyether compound having excellent curability.SOLUTION: A method for producing a polyether compound having a urethane bond, comprising contacting an initiator having an active hydrogen with an alkylene oxide-containing starting material in the presence of a double metal cyanide complex catalyst to polymerize the alkylene oxide in the alkylene oxide-containing starting material into the initiator, and reacting the resulting polyether compound having a hydroxyl group with a polyisocyanate, wherein the polyether compound has an acid value of 0.001 to 0.008 mg / g.SELECTED DRAWING: None

The invention relates to the technical field of environmental catalysis and pollution treatment, in particular to a chelated iron desulfurizer. According to the desulfurizer, DOTA is used as a core chelating agent, an iron active center is accurately anchored to a shell layer of a polymer core-shell structure microsphere through a multi-step polymerization and functionalization process, and the design of solution-state complexing iron is assisted, so that the desulfurizer has both solid-phase localization and solution compensation, the capability of resisting poisoning of impurities such as cyanide and mercaptan is remarkably improved, and iron loss is reduced. The desulfurizer is high in desulfurization efficiency and large in sulfur capacity, can stably operate for a long period, shows excellent continuous activity and selectivity under the conditions of coexistence of various impurities and repeated regeneration, and has a good application prospect.

The invention provides a process for preparing cement from aluminum electrolysis overhaul residues and waste anti-seepage material lithium extraction residues, and relates to the technical field of solid waste co-treatment and resource utilization, and the process comprises the following steps: mixing pretreatment: crushing and grinding mixed raw materials, adding a calcium-based fluorine fixing agent, and roasting to decompose cyanide and stabilize fluoride; preparing a cement raw material: mixing the mixed residues with other raw materials according to a certain ratio, adjusting the ratio value, and grinding to prepare the cement raw material; calcining the clinker, namely calcining the raw material at high temperature, treating flue gas, and quickly cooling to obtain the cement clinker; according to the invention, a carbonaceous material in the overhaul slag is utilized to provide part of heat, so that the energy consumption is reduced; fluorides in the two wastes react with each other to generate a more stable compound, so that the fluorine curing efficiency is improved, and the environmental risk is thoroughly eliminated; heavy metal is further solidified in a cement kiln high-temperature environment, harmless treatment is achieved, the resource utilization rate is increased, and product performance is reliable.

The present invention relates to a thermoplastic resin composition including: a base resin including a diene-based graft polymer and a vinyl-based non-grafted polymer including an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit; and an additive including an olefin-based non-grafted polymer including an olefin-based monomer unit, a (meth)acrylate-based monomer unit, and a maleic acid-based monomer unit.

To provide a method for producing a polyether compound having a urethane bond, capable of improving filterability in a purification process.SOLUTION: The method for producing a polyether compound having a urethane bond comprises polymerizing an initiator having an active hydrogen and an alkylene oxide in the presence of a double metal cyanide complex catalyst and reacting a composition containing the obtained polyether compound having a hydroxy group with a polyisocyanate. The double metal cyanide complex catalyst is in the form of particles, the double metal cyanide complex catalyst has a 50% cumulative volume particle size of from 0.01 to 4.0 μm as determined from a volume-based cumulative particle size distribution obtained by a laser diffraction scattering method, and the content of the particles having a particle size of at least 11 μm is at most 10 vol% based on the total volume of the double metal cyanide complex catalyst.SELECTED DRAWING: None

The application belongs to the field of chemical industry, and particularly relates to a preparation method of N,N,N',N'-tetramethyl diacrylamine, which comprises the following steps: hydrogenation reaction is carried out by introducing hydrogen into an amine group propyl cyanide compound, a dimethylamine aqueous solution and a catalyst; under the protection of inert gas, solid-liquid separation (filtration) is carried out on the obtained hydrogenated material, so that a filtrate and a filter cake are obtained; and the filtrate is subjected to rectification, so that N,N,N',N'-tetramethyl diacrylamine (2(DMAP)A) is obtained. The application has the advantages of simple process, mild conditions, green environmental protection, high product yield and facilitation of industrial production.

Provided is a method for producing a polyoxypropylene polymer with which it is possible to achieve a high average molecular weight in a short polymerization time. This method is a method for producing a polyoxypropylene polymer having a number average molecular weight of 30,000-70,000 (inclusive). The polymerization is carried out by additionally oxidizing propylene over time in a reaction system comprising a hydroxyl group-containing initiator and a composite metal cyanide complex catalyst. The polymerization temperature is set to 120-160 DEG C, the moisture content in the propylene oxide is 200 ppm or less, and the ratio (X / Y) of the designed molecular weight (X) to the time (Y) (minute) required to add the propylene oxide is 95-130.

A thermoplastic resin composition including an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) including a polymer seed including 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, a rubber core surrounding the polymer seed and including 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, and a graft shell surrounding the rubber core and including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl (meth)acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an aromatic vinyl compound, and a vinyl cyanide compound. The present disclosure also relates to a preparation method and a molded article.

The invention provides an environment-friendly gold beneficiation aid and a preparation method thereof. The aid comprises 30-60 parts of a modified thiosulfate complexing component, 15-30 parts of a catalytic stable oxidation component, 8-20 parts of an interface functional component, 10-25 parts of a buffer component and 5-15 parts of a permeation aid. The preparation method comprises the following steps: performing high-shear mixing on the raw materials to obtain a homogeneous mixture; curing and stabilizing the homogeneous mixture to obtain a cured material; and carrying out air jet pulverization on the cured material until D90 is 20-40 microns, so as to obtain the additive product. According to the additive, by innovatively compounding a modified thiosulfate complexing component and a catalytic oxidation system, cyanide pollution is completely eradicated while efficient leaching of gold is achieved, and the additive has the advantages of environmental protection breakthrough and leaching efficiency.

The present invention pertains to a double metal cyanide complex catalyst having a moisture content of 8,000 to 140,000 ppm as determined by the Karl Fischer method, and having diffraction peaks at 2θ=36° and 2θ=47°, but no diffraction peak at 2θ=34°, in an X-ray diffraction pattern.

A method of preparing a thermoplastic resin including kneading and extruding an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A), or an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) and a matrix resin (B) including one or more selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound, an alkyl methacrylate, and an alkyl acrylate. A total content of the alkyl acrylate included in the thermoplastic resin is 20 to 50% by weight. An alkyl acrylate coverage value (X) of the thermoplastic resin as calculated by Equation 1 (X={(G−Y) / Y}×100) is 65 or more. In Equation 1, G represents a total gel content (%) of the thermoplastic resin, and Y represents a content (% by weight) of the alkyl acrylate in the gel of the thermoplastic resin.

The application discloses a preparation method and application of a composite catalyst for preparing carbon dioxide-based polycarbonate polyols, and belongs to the technical field of catalysts. The composite catalyst is prepared by compounding a double metal cyanide catalyst and a zinc gallate catalyst in a certain proportion. In the presence of a chain transfer agent, the two kinds of catalysts produce a synergistic effect in a polymerization process: the double metal cyanide catalyst serves as a main active center, initiates and promotes chain growth; and the zinc gallate catalyst serves as a selective regulation center, promotes carbon dioxide insertion and inhibits side reactions, so that the catalysts have high activity and high selectivity. The polycarbonate polyols prepared by using the composite catalyst have high carbon dioxide insertion rates and low number average molecular weights. Moreover, the composite catalyst has simple preparation process, is wide in raw material and low in cost, and is suitable for industrialized scale preparation.

Disclosed is a thermoplastic resin composition, a method of preparing the same, and a molded article including the same. Also disclosed is a thermoplastic resin composition prepared by adding a recycled vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound copolymer and a recycled polycarbonate resin to a composition including a vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound graft copolymer, an α-methyl styrene-vinyl cyanide compound-aromatic vinyl compound copolymer, and an aromatic vinyl compound-vinyl cyanide compound copolymer according to a predetermined composition ratio.

Provided are a thermoplastic resin composition and a molded product manufactured therefrom, the thermoplastic resin composition including (A) 10 to 40 wt % of an acrylic graft copolymer that includes a core including an acrylic rubbery polymer, and a shell formed by graft polymerization of a monomer to the core, the monomer including an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyanide compound, or a combination thereof; (B) 30 to 60 wt % of a polyalkyl (meth)acrylate resin; and (C) 10 to 40 wt % of an N-(substituted)maleimide-acrylic copolymer.

The invention relates to application of a cobalt compound, a solar cell, slurry of the solar cell and a photovoltaic solder strip. In the application of the cobalt compound in preparation of the photovoltaic module, the cobalt compound comprises anhydrous cobalt chloride and thiocyanide. The cobalt compound is applied to the photovoltaic module, and when water vapor intrudes into the photovoltaic module, anhydrous cobalt chloride in the cobalt compound becomes red when encountering water, so that the area, provided with the cobalt compound, in the photovoltaic module presents conspicuous red which is used as a visual warning signal; maintenance personnel can quickly find and process potential problems of the photovoltaic module; and when the temperature of the photovoltaic module is too high, the anhydrous cobalt chloride reacts with the thiocyanide to present black, so that maintenance personnel can be warned of possible problems of the photovoltaic module in time.

This application relates to the technical field of bimetallic cyanide catalyst preparation, specifically disclosing an in-situ acid treatment modification method for bimetallic cyanide catalysts and the catalyst itself. The modification method comprises: S1, preparation of precursors to obtain zinc salt solution and cobalt cyanide salt solution; S2, co-precipitation reaction of zinc salt solution and cobalt cyanide salt solution under weakly alkaline conditions; S3, in-situ acid treatment, with the slurry pH controlled within the target range of 4-6.5 by real-time pH closed-loop regulation; S4, in-situ aging; S5, post-treatment to obtain the final product. Through in-situ acid treatment, combined with the synergistic effect of pH closed-loop regulation, the irreversible secondary aggregation of nanoparticles is inhibited at its source, and free metal ions are locked by organic acid coordination, significantly reducing the Co content in the polyether product. 2+ The dissolution rate and platinum-cobalt color number improve the catalyst's activity, stability, and batch consistency.

The invention relates to a cyanide degrading bacterium, a culture application thereof and a preparation containing the cyanide degrading bacterium, the cyanide degrading bacterium is bacillus cereus 2H-2, the bacterium is preserved in the China General Microbiological Culture Collection Center on March 18, 2024, and the preservation number is CGMCC No.30063. The cyanide degrading bacterium has the advantages that the cyanide degrading bacterium can be used for degrading cyanide, and the cyanide degrading bacterium can be used for degrading cyanide; the strain provided by the invention can stably degrade cyanide in a water body with heavy metals, has good settleability and is easy to separate and obtain.

The present invention relates to an improved process for preparing double metal cyanide (DMC) catalysts for the preparation of polyoxyalkylene polyols, preferably polyether polyols and / or polyether carbonate polyols. The invention further provides DMC catalysts which are obtainable by this process and for the use of the catalysts according to the invention for preparing polyoxyalkylene polyols.

The present invention provides a functional agent capable of suitably imparting a predetermined function (e.g., heat resistance) to a main polymer to be mixed, and a polymer composition having excellent functionality. [Solution] According to one aspect of the present invention, a functional agent is provided that is used by adding it to a main polymer, and contains a maleimide copolymer having (A) aromatic vinyl monomer units, (B) maleimide monomer units, and (C) vinyl cyanide monomer units, wherein (A) aromatic vinyl monomer units include α-substituted aromatic vinyl monomer units.

A thermoplastic resin composition including an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) including a polymer seed including 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, a rubber core surrounding the polymer seed and including 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, and a graft shell surrounding the rubber core and including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyanide compound, and an imide-based compound. The present disclosure also relates to a preparation method and a molded article.

The preparation method comprises the following steps: mixing a base material containing gamma-Al2O3, gamma-Al2O3 nanofibers, a pore forming agent and a binder according to a certain ratio, and carrying out drying, high-temperature calcination, chemical modification and other processes to prepare a micron honeycomb and nanofiber network ceramic carrier. Meanwhile, through modification of a silane coupling agent, polar groups are introduced to the surface of the catalyst, and the adsorption capacity of the catalyst to polar organic matter such as phenols, ammonia nitrogen and cyanide and ionic pollutants is improved. Finally, the active center of the catalyst is increased through double doping of manganese and copper, and the ozone catalytic oxidation performance is improved. The prepared catalyst is simple in preparation process, good in ozone catalytic oxidation effect and wide in market prospect.

A method of producing a polyether compound containing a hydroxyl group according to the present invention includes polymerizing an AO in an AO-containing raw material with an initiator containing a hydroxyl group in a presence of a composite metal cyanide complex catalyst, in which a content of methanol in the AO-containing raw material is 0.0001 ppm or greater and less than 20 ppm with respect to a total mass of the AO-containing raw material, a method of producing a polyether compound containing a reactive silicon group further includes converting a hydroxyl group of a polyether compound into a group containing a reactive silicon group, a method of producing a polyether compound having a urethane bond further includes reacting a polyether compound containing a hydroxyl group with a polyisocyanate, and a method of producing a polyether compound containing a polymerizable unsaturated group further includes converting a hydroxyl group of a polyether compound into a group containing a polymerizable unsaturated group.

The invention provides high-molecular-weight low-viscosity polyether polyol and a preparation method and application thereof.The preparation method includes the step that mixed dihydric alcohol serves as an initiator and reacts with an epoxy compound under the action of a double-metal cyanide complex catalyst and an auxiliary acid, and the mixed dihydric alcohol contains propylene glycol and bifunctional polyether polyol. By adopting the technical scheme provided by the invention, the ultra-high molecular weight and low viscosity polyether polyol for the MS adhesive can be prepared.

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for degrading cyanide-containing wastewater. When the cyanogen-containing wastewater is cyanogen-containing complex wastewater, the method for degrading the cyanogen-containing wastewater comprises the following steps: sequentially carrying out photolysis reaction and first oxidation reaction on the cyanogen-containing wastewater under the condition that the pH value is 9.5-13.0; when the cyanide-containing wastewater is free cyanide-containing wastewater, the method for degrading the cyanide-containing wastewater comprises the following steps: sequentially carrying out a second oxidation reaction on the cyanide-containing wastewater under the condition that the pH value is 9.5-13.0; oxidizing agents for the first oxidation reaction and the second oxidation reaction are solutions of peracetic acid; the second oxidation reaction is carried out under the condition of ultraviolet irradiation. The method provided by the invention can destroy stable coordinate bonds (Fe-CN) of ferricyanide, improves the degradation efficiency, and does not generate secondary pollution.

A resin composition according to an embodiment of the present invention comprises: a graft copolymer including a conjugated diene-based polymer, an alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit, and a vinylcyan-based monomer unit; and a styrene-based copolymer including an alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit, and a maleimide-based monomer unit, wherein the conjugated diene-based polymer may have a degree of crosslinking of 85% or more and a degree of swelling of 14 or less, and the graft copolymer may have a degree of swelling of 5-16.

The thermoplastic resin composition is a melt-kneaded mixture of a rubber-containing graft copolymer (A) obtained by copolymerizing a monomer mixture containing an aromatic vinyl compound and a vinyl cyanide compound in the presence of a rubber polymer, and a copolymer (B) that is independent of the rubber-containing graft copolymer (A) and is obtained by copolymerizing a monomer mixture containing an aromatic vinyl compound and a vinyl cyanide compound, and the calcium content of the thermoplastic resin composition is 0.3 mass % or less relative to the total mass of the thermoplastic resin composition.

The present invention relates to a composite metal cyanide complex catalyst having a water content of 8,000-140,000 ppm as determined by the Karl Fischer method, having diffraction peaks at 2 [theta] = 36 DEG and 2 [theta] = 47 DEG in an X-ray diffraction pattern, and having no diffraction peak at 2 [theta] = 34 DEG.

This invention belongs to the field of antibacterial coating technology, specifically relating to a method for preparing a composite antibacterial and detoxifying coating on a ceramic surface, comprising the following steps: S1. Applying gold solution to a fired ceramic surface and then annealing to prepare a transition layer; S2. Preparing a silver-plated antibacterial layer on the ceramic surface with the transition layer formed by vacuum evaporation; S3. Preparing a titanium-plated protective layer on the surface with the silver-plated antibacterial layer formed by vacuum evaporation; S4. Vacuum annealing the ceramic with the titanium-plated protective layer formed to obtain the finished product. The composite antibacterial and detoxifying coating on a ceramic surface prepared by this invention has excellent antibacterial properties, with an antibacterial rate of up to 99.99%, meeting the antibacterial performance requirements of ceramics. Furthermore, the composite antibacterial and detoxifying coating on a ceramic surface prepared by this invention can effectively reduce cyanide in solutions such as liquor, meeting the detoxification performance requirements of ceramics. In addition, the composite antibacterial and detoxifying coating on a ceramic surface prepared by this invention has a precious metal ceramic decorative effect, making the ceramic surface smoother and more glossy, thus improving the quality of the ceramic.

The invention discloses polyether for a polyester DTY (Draw Textured Yarn) oiling agent as well as a preparation method and application thereof, and relates to the technical field of polyester DTY oiling agents. The preparation method of the polyether for the polyester DTY oiling agent, provided by the invention, comprises the following steps: by taking a compound containing an active hydrogen group as an initiator and double metal cyanide as a catalyst, carrying out polymerization reaction on the initiator and an epoxy mixture under the pressure of 0-0.3 MPa and the temperature of 120-150 DEG C, so as to obtain the polyether for the polyester DTY oiling agent, the epoxy mixture comprises epoxypropane and ethylene oxide, and the mass ratio of the epoxypropane to the ethylene oxide is 1: (1.2-3). The DTY oiling agent adopting the polyether as the emulsifier has no peculiar smell, and has good stability, yellowing resistance, smoothness, bundling property and washability.