258 results about "Acrylonitrile" patented technology

This invention relates to the field of hafnium carbide technology and discloses a thermal decomposition preparation process for hafnium carbide precursors. The process includes: dissolving hafnium tetrachloride in anhydrous ethanol, adding propylene oxide dropwise for neutralization and acid removal to obtain a neutral ethanol-hafnium precursor solution; adding ethyl acetoacetate methacrylate and heating for coordination to obtain a hafnium coordination monomer solution; adding acrylonitrile and an initiator and heating for polymerization; when the viscosity of the reaction solution increases, injecting a dimethyl sulfoxide hot solution of melamine as a locking liquid; precipitating, separating, and drying to obtain the hafnium carbide precursor; and after oxidative crosslinking treatment, calcining at high temperature under an inert atmosphere to undergo carbothermic reduction to obtain hafnium carbide powder. This invention achieves molecular-level dispersion of precursor components through liquid-phase coordination and in-situ network locking, effectively reducing the reaction temperature and inhibiting grain agglomeration, thus producing high-purity, ultrafine hafnium carbide powder.

The present application relates to waste gas treatment process field, disclose a kind of acrylonitrile waste gas treatment method and device, the method includes the following steps: (1) the concentration of acrylonitrile waste gas is adjusted to 0.5-2000mg / m 3 ; (2) the acrylonitrile waste gas is sent to adsorption unit at 80-120m 3 / h flow rate for adsorption treatment, wherein the adsorption unit has one or more than two adsorption devices, in the process of adsorption treatment, the acrylonitrile waste gas is injected below the water surface in tower body, and the water in the tower body is continuously circulated and output, and after cooling, it is sprayed from the top of the tower body into the tower body.The method in the present application has the advantages of simple treatment process, low cost, more energy saving and environmental protection, and the method uses multi-stage adsorption process, different adsorption stages can be selected according to the adsorption treatment effect, the adsorption device can be switched and maintained in time, and the waste gas treatment effect is still good, more suitable for industrial application.

The application relates to a composite sodium ion battery anode material and a preparation method and application thereof, and belongs to the technical field of sodium ion batteries. The preparation method comprises the following steps: S1, dissolving polyacrylonitrile and tetrabutyl titanate in a solvent II, uniformly mixing to obtain a shell layer solution; dissolving multi-walled carbon nanotubes and styrene-acrylonitrile copolymer in a solvent III, uniformly mixing to obtain a core layer solution; stirring and heating gallium, silicon and silicon dioxide, then adding a solvent I to obtain gallium-silicon nanoparticles through ultrasonic treatment, adding the gallium-silicon nanoparticles into the core layer precursor solution to obtain an intermediate layer solution; S2, performing three-axis electrostatic spinning on the three solutions through a concentrically shaped channel nozzle to obtain a composite film; and S3, carbonizing the composite film to obtain the composite sodium ion battery anode material. The composite sodium ion battery anode material can make the electrode have high capacity and excellent cycle stability, prolong the service life of the battery, and is a self-healing and self-repairing battery anode.

The application relates to the technical field of cable material manufacturing, and discloses a light-weight flexible wear-resistant electrical equipment connecting cable, a sheath of the connecting cable being made of raw materials including the following: polyester type thermoplastic polyurethane elastomer, styrene-acrylonitrile copolymer, maleic anhydride grafted polyolefin elastomer, blocked isophorone diisocyanate, wear-resistant premixed solution containing a catalyst, slow-release foaming master batch and functional additives; wherein the wear-resistant premixed solution containing the catalyst contains hydroxyl-terminated polydimethylsiloxane and a bismuth octoate catalyst, the slow-release foaming master batch contains modified azodicarbonamide foaming agent and carrier resin, and the functional additives contain antioxidants and carbodiimide hydrolysis stabilizers. According to the application, the hydroxyl-terminated polydimethylsiloxane containing the catalyst and the blocked isocyanate are introduced into the polyurethane matrix in cooperation through a reaction extrusion process, the isocyanate groups are unblocked at high temperature, and the organic silicon chain segment is chemically bonded with the matrix resin.

This invention relates to a method for preparing polyacrylonitrile-based high-performance carbon fiber precursor, mainly addressing the problems of high fiber fineness CV value, low strength, and high strength CV value in existing carbon fiber precursors. This invention employs a wet spinning process, using curved rollers in the drying and densification stage. Simultaneously, at 350–450 kPa, the relationship between steam drawing tension and steam drawing ratio satisfies a linear relationship: y = Ax - 50.6 (400 ≤ A ≤ 800, 1 ≤ x ≤ 5). Wherein, y is the steam drawing tension, and x is the steam drawing ratio. The technical solution adopted in this invention effectively solves the problems of high fiber fineness CV value, low strength, and high strength CV value in carbon fiber precursors, and can be used in the industrial production of polyacrylonitrile-based high-performance carbon fiber precursors.

This application provides a rubber composition for stator lining and a motor assembly, relating to the field of rubber material technology. The rubber composition for stator lining, by weight, comprises: 100 parts of nitrile rubber, 10-14 parts of plasticizer, 60-70 parts of reinforcing component, 1-5 parts of silane coupling agent, and 10-15 parts of vulcanizing component; wherein, based on the weight of the nitrile rubber, the acrylonitrile content in the nitrile rubber is 30%-40%. The technical solution of this application can effectively solve the problems of insufficient adhesion strength and poor interfacial bonding stability between the stator lining layer and the metal housing in the prior art, which leads to cracking and delamination of the stator during use.

This utility model discloses a furnace ash acidic water treatment system, including a furnace ash conveying mechanism, a treatment mechanism connected downstream of the furnace ash conveying mechanism, and an intelligent control system. The treatment mechanism is also connected to an acidic water source for the synergistic treatment of acidic water and furnace ash. The intelligent control system is connected to the furnace ash conveying mechanism and the treatment mechanism to form a control and regulation loop that collects, stores, calculates, and regulates the output. This utility model combines the treatment of furnace ash and acidic water in an acrylonitrile co-processing unit, achieving "waste-to-waste" treatment, reduction of waste, and resource utilization, reducing the consumption of alkaline solutions for acidic water, and improving the economic efficiency of the system. Simultaneously, the intelligent control system enables automated operation of the system, reduces the frequency of manual operation, and solves the problems of over-adjustment, frequent adjustment, and instability that easily occur in traditional PID logic control, achieving rapid, stable, and precise control of the system.

The present invention relates to a process for preparation of an ABS graft copolymer. The process comprises (i) grafting a butadiene latex with a gel content in a range from 75% to 90% with a first portion of acrylonitrile and styrene monomers in a percentage ratio in a range from 1.4 to 1.6, in presence of an initiator- 1 and a molecular weight regulator, carrying out the polymerization for 0.5 hours to 1.5 hours, (ii) adding a second portion of acrylonitrile and styrene, additional initiator- 1 and molecular weight regulator to step (i), and continuing polymerization for 3 hours to 5 hours, and (iii) additionally adding the initiator- 1 or an initiator-2 to step (ii), and continuing polymerization for 1 hour to 2 hours. The feeding pattern of monomers in the process provides a high polymerization rate and thereby reduces residual monomer content.

This invention discloses a vinylphosphonic acid-acrylonitrile copolymer adhesive, its preparation method, and its application. The vinylphosphonic acid-acrylonitrile copolymer adhesive comprises the following components by mass: 76%–92% acrylonitrile, 4%–12% acrylic monomers, and 4%–12% vinylphosphonic acid monomers. The vinylphosphonic acid-acrylonitrile copolymer adhesive is prepared by subjecting each monomer to a free radical polymerization reaction. By simultaneously introducing flexible acrylic segments and vinylphosphonic acid functional units into a rigid acrylonitrile skeleton, the copolymer adhesive possesses strong adhesion, flexibility, electrochemical stability under high pressure conditions, and applicability to different metal ion systems.

This invention discloses a method for preparing a composite for treating acrylonitrile production wastewater, comprising: dispersing an oxidant in an aqueous solution, then adding graphite material, heating the system and stirring to react, maintaining the temperature after the reaction, adding an aqueous solution of β-glycerophosphate and stirring until homogeneous, then naturally cooling to room temperature, allowing it to stand, removing the graphite material, and performing conventional washing, drying, and pulverizing to obtain modified graphite powder with a particle size of 200-400 mesh; dissolving a polyol in water, then heating to a certain temperature, adding N1,N2-bis(2,3-dihydroxy-4,6-disulfonic acid benzyl)ethylenediamine and stirring, then adding polyacrylamide until completely dissolved, then adding the modified graphite powder obtained above and stirring until homogeneous, maintaining the temperature and reacting under ultraviolet light, and cooling to room temperature after the reaction to obtain the final product. The composite of this invention can effectively treat pollutants in wastewater, and the process is simple and low-cost.

The application relates to the technical field of synthetic rubber, in particular to a nitrile rubber, a preparation method and application thereof, wherein the preparation method adopts at least potassium saponification soap and / or sodium saponification soap of disulfated rosin acid, C 10 -C 13 A composite emulsifier system composed of linear alkyl benzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt and a low-temperature emulsion polymerization process, and the obtained nitrile rubber can be used in the field of oil-resistant sealing in a hydraulic oil operation environment.

The present application relates to a novel long-acting solid coated slow-release acid and a preparation method. The solid coated slow-release acid has a core-shell structure, the shell layer comprises a polymer, and the core comprises an acid former; the acid former is at least one selected from chlorinated aromatic hydrocarbons, chlorinated acid esters and acid chlorides, and the polymer is at least one selected from polyesters, poly(meth)acrylates, epoxy resins, polyolefins, polyacrylonitriles, polyimides, polyvinyl alcohols. The solid coated slow-release acid has the advantages of small environmental pollution, long acid release time, excellent deep penetration performance, high acid generating efficiency, easy storage and transportation, good slow-release performance and simple preparation.

The application provides a static spinning solution containing pyridinium propane sulfonate, a preparation method thereof and a static spinning method thereof. The static spinning solution comprises an additive pyridinium propane sulfonate, PAN polyacrylonitrile and DMF. Experiments prove that the static spinning solution has low cost, can improve the entanglement degree between molecular chains, inhibits the breakage of a solution jet in a static spinning process, and the micro-morphology is improved.

The present invention relates to a copolymer, a slurry composition comprising the copolymer, a separator, and a secondary battery, the copolymer comprising sulfur-containing monomer units, acrylonitrile monomer units, acrylate monomer units containing linear alkyl groups having 1 to 20 carbon atoms, and vinyl acetate monomer units.

This invention provides a composite structural component made of thermosetting carbon fiber composite material and plastic, and its preparation method, relating to the field of composite material technology. This invention achieves an effective connection between the thermosetting carbon fiber composite material and the plastic mounting structure by introducing a PC / ABS composite film between the thermosetting carbon fiber composite material and the plastic mounting structure, combined with co-curing molding and subsequent injection molding processes. Specifically, by mixing polycarbonate and acrylonitrile-butadiene-styrene copolymer at mass ratios of 30%-40% and 60%-70%, the composite film possesses both good temperature resistance and interfacial compatibility. Polycarbonate can form a good melt bond with the plastic material during subsequent injection molding, while the acrylonitrile-butadiene-styrene copolymer facilitates the formation of a stable interfacial bond with the thermosetting carbon fiber composite material during co-curing, thereby constructing a transition layer between the two materials and achieving a stable connection between the thermosetting carbon fiber composite material part and the plastic mounting structure.

The application discloses a preparation method and application of a vulcanized polyacrylonitrile electrode material. The core steps are as follows: 1. a mixed solution of acrylonitrile, an ultraviolet light initiator and a solvent is prepared, and polyacrylonitrile is prepared by polymerization under the initiation of 250-420 nm ultraviolet light; 2. the polyacrylonitrile is uniformly mixed with elemental sulfur, and is vulcanized in an inert atmosphere at 300-450 DEG C, and then post-processing is performed to remove unreacted sulfur, thereby obtaining vulcanized polyacrylonitrile; and 3. the vulcanized polyacrylonitrile is mixed with a conductive agent and a binder to form a positive electrode slurry, and is coated on a carbon-coated aluminum foil to obtain a positive electrode. The polyacrylonitrile prepared by photopolymerization has a uniform morphology, and after vulcanization, a stable sulfur fixation structure is formed, the polysulfide shuttle is inhibited, and the sulfur loading is improved. When the material is used for a lithium battery, the specific capacity is more than 650 mAh / g, and the material has excellent rate and cycle stability. The method is simple, efficient and highly reproducible, is suitable for large-scale production of a lithium-sulfur / sodium-sulfur battery positive electrode, and solves the problems of fast capacity attenuation and poor rate of a traditional battery.

This invention belongs to the field of polymer-based solid-state battery technology, specifically disclosing a method for preparing a precursor solution and a gel polymer electrolyte, and their applications. The precursor solution includes a liquid monomer and an electrolyte salt dissolved in the liquid monomer, wherein: the monomer is one or more of the following: cyclic ether, cyclic carbonate, acrylamide and acrylamide derivatives containing functional groups, acrylate and acrylate oligomers containing double bonds on one side, acrylonitrile and acrylonitrile derivatives containing functional groups, cyanoacrylate and cyanoacrylate derivatives containing functional groups; the electrolyte salt is a lithium salt, potassium salt, or sodium salt. This invention utilizes electron beam irradiation to initiate the polymerization of the precursor solution inside the battery to prepare a gel polymer electrolyte or polymer-based battery, avoiding the adverse effects of using initiators on battery performance, while effectively improving the contact performance of the electrode-electrolyte interface. This preparation method is simple and efficient, and is conducive to large-scale production.

This invention discloses a method for preparing bio-based furan-acrylonitrile copolymer particles, pre-oxidized particles, and carbonized particles, relating to the field of polymer and carbon materials technology. The invention polymerizes bio-based furan monomers, acrylonitrile monomers, and an initiator under an inert atmosphere to obtain copolymer particles. This copolymerization system significantly enhances the free radical polymerization reactivity of the bio-based furan monomers, promoting their embedding into the polyacrylonitrile molecular chain. The reaction requires no stabilizers or surfactants, is mild, simple, and environmentally friendly, and the resulting particles exhibit good monodispersity and controllable particle size. This invention regulates the cyclization mechanism through copolymerization, partially shifting the free radical reaction pathway to an ionic mechanism, lowering the cyclization energy barrier, suppressing concentrated exothermic reactions, improving pre-oxidation processing performance, and simultaneously enhancing carbon yield and thermal stability. This invention achieves efficient utilization of bio-based furan monomers in the polyacrylonitrile system, providing a new approach for the development of green, high-performance nitrogen-doped carbon particles.

The present application relates to sewage treatment technical field, specifically to a kind of acrylonitrile sewage treatment device, comprising: microbial purification tank, exhaust mechanism, the exhaust mechanism has two and symmetrically set in the two sides of the inner wall of microbial purification tank width direction, the exhaust mechanism includes the cavity plate fixedly connected in the inner wall of microbial purification tank. By cavity plate, partition block and air separation assembly in exhaust mechanism, air can be injected and extracted into microbial purification tank, so as to provide corresponding purification environment for aerobic microorganism or anaerobic microorganism to purify sewage, and then realize that when injecting air, air exposure area and immersion area can inject air into microbial purification tank simultaneously to provide sufficient oxygen for aerobic microorganism to purify sewage, help its efficient decomposition of pollutants in sewage, while when extracting air, air separation assembly disconnects the communication of air exposure area and immersion area, so that suction airflow is only discharged from air exposure area, avoid sewage from flowing out with cavity plate, while avoiding suction airflow from immersion area to interfere with anaerobic environment in tank.

This application discloses a chemiluminescence detection kit for acrylonitrile magnetic microparticles and its detection method. The kit includes a magnetic bead working solution and a luminescent label. The magnetic bead working solution includes acrylonitrile monoclonal antibody A and streptavidin. The luminescent label includes acrylonitrile monoclonal antibody B, modified nano-silica, anhydrous toluene, methoxy polyethylene glycol-succinimide ester, N,N-dimethylformamide, acrylonitrile succinimide ester, glutaraldehyde, and ethanolamine. This application uses modified nano-silica as a carrier and grafts a polyethylene glycol hydrophilic layer onto its surface, which amplifies the acrylonitrile ester molecule signal, reduces non-specific adsorption, and improves the sensitivity, specificity, and reliability of the detection.

The present disclosure relates to a composition comprising a phenylacrylonitrile compound of formula (I) for the use in absorbing blue-violet light, the method of producing the same, and the product comprising the same.

This invention relates to the field of liquid bag film preparation technology, and in particular to a lightweight polyethylene liquid bag film and its preparation method. The lightweight polyethylene liquid bag film comprises the following raw materials: polyolefin matrix resin, 3-(4-vinylphenoxy)-1-propylene, (3-buten-1-yl) acrylate, calcium lignosulfonate, carboxylated butadiene-acrylonitrile latex, trimethylolpropane triacrylate, initiator, crosslinking agent, accelerator, antioxidant, and slip agent. In the preparation process, 3-(4-vinylphenoxy)-1-propylene and (3-buten-1-yl) acrylate form a long-chain branched structure in the system, improving the tensile strength of the finished product. Simultaneously, trimethylolpropane triacrylate is added to increase the entanglement between molecular chains, and calcium lignosulfonate and carboxylated butadiene-acrylonitrile latex are added to dissipate impact energy and inhibit crack propagation. Therefore, the resulting polyethylene liquid bag film also exhibits significant impact resistance.

The present application relates to lithium ion battery separator spraying adhesive and its preparation method and application, belong to lithium ion battery adhesive technical field.The technical problem solved by the present application is to provide a kind of lithium ion battery separator spraying adhesive.The present application lithium ion battery separator spraying adhesive includes acrylonitrile polymer, hydrophilic polymer and surfactant;The weight ratio of acrylonitrile polymer, hydrophilic polymer and additive is 80-98:1-20:1-5.The present application lithium ion battery separator spraying adhesive is sprayed on battery separator, improves the adhesion strength between substrate and pole piece under the premise of maintaining better hollow structure, and the cold-pressed adhesion performance of the sprayed separator and battery positive and negative pole is good.The preparation method of the present application battery separator spraying adhesive is simple, prepared with water as solvent, green and environmental protection, cost is lower, and can be industrialized production.

This application provides a secondary battery and an electrical device. The secondary battery includes a negative electrode sheet, which includes a negative electrode film layer. The negative electrode film layer includes a first active layer and a second active layer. The first active layer and / or the second active layer includes silicon, and the mass percentage of silicon in the second active layer is higher than the mass percentage of silicon in the first active layer. The first active layer includes a first composite binder, and the second active layer includes a second composite binder. The first composite binder and / or the second composite binder include binder A and binder B. Binder A is styrene-butadiene rubber, and binder B is selected from one or more of polyacrylic acid binders, polyacrylonitrile, hydroxypropyl methylcellulose, methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, acrylonitrile copolymer, sodium alginate, chitosan, and their derivatives. The mass ratio of binder A to binder B in the first composite binder is higher than the mass ratio of binder A to binder B in the second composite binder.

The present invention belongs to the field of chemical engineering. Disclosed are an acrylonitrile catalyst, and a preparation method therefor and the use thereof. The preparation method comprises: (1) mixing solutions of a molybdenum compound and a bismuth compound at an Mo / Bi molar ratio of 0.5-1.5 to prepare bismuth molybdate containing an α-phase and / or a γ-phase; (2) synthesizing a pentasil-type molecular sieve having an Si / V molar ratio of 50-150 from a silicon source, an organic amine, and a vanadium compound; (3) mixing a silica sol with a molybdenum compound solution at an Si / Mo molar ratio of 0.5-1, then sequentially adding solutions of a nickel, a tungsten, and a thallium compound, and phosphoric acid, the molecular sieve, and the bismuth molybdate thereto, such that the ratio of the weight percentages of Mo, Bi, Ni, W, Tl, V, and P in the catalyst, on the basis of oxides, is (37-38):(4-6):(3-5):(2-3):(0.2-0.3):(0.1-0.3):(0.7-0.8); (4) adding SiO2 powder thereto, such that SiO2 accounts for 45 wt% to 55 wt% of the catalyst; and (5) pulping and homogenizing the resulting mixture, then spray molding same at an outlet temperature of 150-180°C, and calcining same in an air atmosphere at 550-680°C for 1-6 h. The catalyst has a good activity, selectivity and stability, and is wear-resistant.

This invention relates to the field of adsorption materials technology, specifically to a high-performance seaweed carbon fiber material based on microsphere phase change and its preparation method. The method involves separating the components of seaweed raw materials to construct a "core-shell" structured microsphere phase change unit with calcium alginate microspheres as the shell and seaweed active polysaccharides as the phase change medium. A composite spinning solution is prepared by blending sulfonic acid-based cellulose nanocrystals with polyacrylonitrile, dispersing the microsphere phase change unit within it. After electrospinning, catalytic carbonization, and steam activation, the seaweed carbon fiber material is finally obtained. The sulfonic acid groups effectively catalyze the cyclization reaction of polyacrylonitrile during carbonization, significantly enhancing the density of the carbon skeleton and producing a multi-level synergistic enhancement effect with the microsphere phase change unit. This results in a material that simultaneously possesses ultra-high strength and high adsorption capacity, solving the technical challenge of simultaneously achieving both mechanical and adsorption properties in biomass carbon fibers.

The application provides a porous carbon material for adsorbing heavy metals and a preparation method and application thereof, and relates to the technical field of adsorbent preparation. The preparation steps of the porous carbon material include: S1, stirring hydrochloric acid dopamine and N-hydroxymethyl acrylamide in anhydrous ethanol, adding concentrated sulfuric acid for reaction, filtering, and washing until neutral to obtain DTA; S2, adding acrylamide, acrylonitrile, acrylic acid and 3-(acrylamidomethyl)-5-benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid into water to obtain a solution system, adding sodium hydroxide, the intermediate product DTA and 2-hydroxy-4-(2-hydroxyethoxy)-2-methylbenzophenone in sequence, carrying out ultrasonic treatment, irradiating under a mercury lamp light source, washing, and freeze-drying to obtain PAAAS-D; and S3, carrying out carbonization of the PAAAS-D after pre-oxidation treatment under a inert atmosphere to obtain CPAAAS-D. The porous carbon material has rich active sites and an optimized pore structure, and can efficiently adsorb Fe, Co and Ni heavy metal ions.

The application belongs to the technical field of batteries, and specifically discloses a lithium ion secondary battery, a preparation method thereof and an electric device. The lithium ion secondary battery comprises a negative electrode sheet, and the negative electrode sheet comprises a negative electrode film layer, wherein the negative electrode film layer comprises a negative electrode active material, a multi-element polymer and carbon nanotubes, and the multi-element polymer comprises a structural unit derived from an acrylic monomer, a structural unit derived from an acrylic ester monomer, a structural unit derived from an acrylamide monomer and a structural unit derived from an acrylonitrile monomer. The design provided in the application can improve the cycle service life of the battery by reducing the expansion degree of the negative electrode sheet.