133 results about "Cyanide compound" patented technology

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.

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.

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.

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 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.

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.

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.

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.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

This invention discloses a method for detecting adiponectin in human serum using a polydopamine-modified wire mesh carbon electrode, specifically relating to the field of adiponectin detection technology. The method involves preparing a 2 mg / mL dopamine hydrochloride solution using a 10 mM tris(hydroxymethyl)aminomethane hydrochloride buffer solution (pH=8.5) and adding it dropwise onto the surface of the working electrode. A polydopamine-modified layer is formed by electropolymerization within a range of -800 mV to 600 mV using cyclic voltammetry. A conductive layer of a poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid complex is then coated. Adiponectin antibodies are then immobilized on the surface of the modified layer via covalent binding of amino and quinone groups. After specific binding with a serum sample, the oxidation peak current change is read out from -100 mV to 350 mV in a buffer detection medium containing 5 mM ferricyanide redox pairs, and the concentration is output from a standard curve. This method improves the density of antibody immobilization sites and inhibits non-specific serum adsorption, enhancing signal stability and sensitivity, and enabling rapid, low-cost quantitative detection of trace amounts of serum.

The invention discloses a sample treating fluid, a vitamin B12 detection sample pretreatment method, a detection kit, a detection method and application thereof, and particularly discloses the sample treating fluid which comprises strong base and sodium dodecyl sarcosinate. According to the sample treatment liquid, VB12 can be completely dissociated, and a relatively stable state can be kept. The invention further provides a detection sample pretreatment method of the vitamin B12. The detection sample pretreatment method comprises the step of mixing the sample treatment liquid with a to-be-detected sample for reaction. According to the sample treatment liquid provided by the invention, VB12 can still be dissociated from binding protein under the condition that highly toxic cyanide or a complex containing cyanide ions and unstable in dissociation is not adopted, and the VB12 can be kept in a relatively stable state to participate in subsequent reaction.

To provide a method for producing a polyoxypropylene-based polymer, by which the polyoxypropylene-based polymer having a large molecular weight and exhibiting a low viscosity due to a narrow molecular weight distribution can be produced without using a large amount of water.SOLUTION: The polyoxypropylene-based polymer having a design molecular weight value X (g / mol) of 12,000g / mol or more and 30,000g / mol or less is obtained by setting the internal temperature of a reaction vessel charged with an initiator, a double metal cyanide complex catalyst, and propylene oxide to 90 °C or higher and 110 °C or lower. Activating the double metal cyanide complex catalyst, and after adjusting the internal temperature of the reaction vessel to a temperature of at least 90 °C and at most 110 °C, carrying out polymerization by additionally adding propylene oxide to the reaction vessel over Y minutes under a condition of at least 120 °C and at most 160 °C, wherein the value of X / Y is at least 35 and at most 67.SELECTED DRAWING: None

The invention discloses a protective layer, a sodium ion battery, a power utilization device and a preparation method of the protective layer, and the preparation method comprises the following steps: S1, carrying out ball milling on experimental-grade cyanide until the particle size D50 is less than 5 microns, weighing the cyanide, a binder, a conductive agent and a solvent after ball milling according to the mass ratio of (2-5): (1-3): (1-2): 10, and uniformly mixing to obtain a mixture A; homogenizing at a constant temperature of 45 DEG C for 4 hours to obtain a to-be-reacted liquid slurry; and S2, preparing the slurry in the step S1 on a diaphragm and / or a positive plate and / or a negative plate, and drying at 90 DEG C, so that the diaphragm and / or the positive plate and / or the negative plate obtain a protective layer, and the thickness of the protective layer is 1-300 [mu] m. The method for preparing the protective layer is simple and easy to operate, and the prepared-CN-based functional protective layer has a stable framework and pore structure, can adsorb Fe < 2 + > / Fe < 3 + >, inhibits side reaction of an interface, and reduces the influence of Fe < 2 + > / Fe < 3 + > on the performance of the sodium ion battery; meanwhile, an extra sodium source is provided, the number of active sodium ions is increased, and the capacity retention rate of the sodium-ion battery is improved.

A thermoplastic resin composition including an aromatic vinyl-vinyl cyanide-acrylic cross-linked copolymer. The thermoplastic resin composition has a 60° gloss, as measured according to ASTM D523 using a gloss meter, of 25 or less, an impact strength of a ¼-inch-thick sample, as measured according to ASTM D256, of 15 kgf·cm / cm or more, and a light reflection coefficient of variation calculated by Equation 1 below of 1.5 or less. It may be possible to achieve a matte property even through injection molding.CLR=DL / ML[Equation⁢ 1]CLR is a light reflection coefficient of variation, DL is a standard deviation of luminous intensity, and ML is an average luminous intensity.

The objective is to provide an aqueous solution of gold(I) compounds that can be used as a gold source for gold plating solutions without causing precipitation over a wide pH range and with long-term oxidation stability. [Solution] An aqueous solution of a gold(I) compound having a structure represented by the following general formula (1), wherein the cyanide concentration is 500 mg / L or less, the sulfite ion concentration is 1000 ppm by mass or less, and the halogen ion concentration is 1000 mg / L or less. RS - -Au-S-(CH2) n -SO3 - ...(1) (In formula (1), R is an organic group having at least one group selected from the group consisting of a sulfonic acid group, a carboxyl group, and an amino group at its terminal or side chain, and n is an integer from 3 to 10.)

This invention discloses a method for recovering gold from gold-containing materials using ultrasound-assisted persulfate extraction, belonging to the field of hydrometallurgical technology. The method involves mixing finely ground gold-containing materials, an acetonitrile aqueous solution, and persulfate, followed by ultrasound-enhanced leaching in an alkaline environment. After leaching, solid-liquid separation is performed to obtain a leachate and a leaching residue. The leachate is then evaporated and crystallized to achieve solvent recovery and reuse, as well as separation of the gold-containing solids. The gold-containing solids are then reduced and calcined to obtain elemental gold. Compared to traditional cyanide and aqua regia leaching processes, this invention eliminates the need for toxic substances and catalysts, significantly improving the selective extraction efficiency of precious metals through ultrasound enhancement. Simultaneously, the solvent can be recycled, reducing costs and avoiding excessive waste residue. This method is green, safe, and highly efficient, possessing significant potential for industrial applications.

The invention discloses an efficient flotation inhibitor for galena and pyrite separation and application of the efficient flotation inhibitor. The inhibitor adopts a ternary compound system of modified lignosulfonate, an organic phosphate corrosion inhibitor and an organic reducing agent, and all the components have a synergistic effect. And the used components are low-toxicity or non-toxic organic compounds and do not contain extremely toxic substances such as cyanide and dichromate, so that the alkaline tailing pollution of a high-alkali lime method is avoided, and the green mineral separation requirement is met. During application, efficient separation can be realized under a weak base condition, the pH of ore pulp does not need to be increased to 11 or above, lime consumption is greatly reduced, corrosion and abrasion of equipment are reduced, and meanwhile, the over-inhibition risk of galena is reduced. The dosage of a roughing inhibitor is small, and the total dosage is low due to subsection decrement addition during concentration. And the N, N-diethyldithiocarbamate is adopted as the collecting agent, the agent system is simple, and industrial implementation is easy. The inhibitor still has a good inhibition effect on pyrite activated by copper ions, overcomes the defect of poor adaptability of a traditional high-alkali method, and has strong adaptability to ores with different properties.

1. Name of the product in this design: Cyanide Analyzer. 2. Purpose of this design: For detecting cyanide in water. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention discloses a preparation method and application of a fluorine-containing aryl ketone compound, and relates to the technical field of organic synthesis.The preparation method comprises the following steps that fluorine-containing olefin, a benzoyl cyanide compound and a boric acid compound serve as raw materials and react under visible light irradiation in the presence of a photocatalyst, alkali and an organic solvent, and the fluorine-containing aryl ketone compound is prepared; the fluorine-containing olefin is used as a key fluorine-containing substrate, multi-component synergistic reaction is realized through visible light catalysis, the problems of substrate limitation, poor selectivity, low yield and the like in an existing method are solved, and the prepared fluorine-containing aryl ketone compound can be used for preparing antibacterial, anti-inflammatory and anti-cancer drugs and has high economic benefits.