1223 results about "Solvent system" patented technology

The invention relates to the technical field of organic chemical synthesis, in particular to a preparation method of 3, 4 '-diaminodiphenyl ether.The preparation method comprises the steps that S1, under inert gas and in a first solvent, m-dinitrobenzene and p-acetamidophenol are subjected to a heating reaction under the condition of a weak base catalyst, and 3-nitro-4-acetamido diphenyl ether is prepared; s2, in a second solvent, the 3-nitro-4-acetamido diphenyl ether is subjected to a hydrogenation reduction reaction, and 3-amino-4-acetamido diphenyl ether is prepared; and S3, dissolving the 3-amino-4-acetaminodiphenyl ether in an alcohol solvent system, adding an aqueous solution of alkali, controlling the reaction temperature, carrying out a hydrolysis reaction, and after the reaction is finished, carrying out post-treatment to obtain the 3, 4 '-diaminodiphenyl ether. The preparation method provided by the invention has the advantages of easily available raw materials, low price, good selectivity and high product yield, and is more suitable for industrial production by comprehensively considering economical efficiency and safety.

The invention relates to a manufacturing method of high-density aviation fuel, in particular to an aviation fuel mixture based on monoterpenoids and a preparation method of the aviation fuel mixture. Comprising monoterpenoids, polyhydric alcohols and a catalyst which serve as raw materials, and the mass ratio of the raw materials to the polyhydric alcohols is 1: 1. The conversion rate is high, the treatment steps are reduced, the thermal stability and combustion gravimetric heat of the product are improved, and the method is suitable for preparing aviation fuel with high density, low viscosity and low-temperature performance; cyclization and hydrogenation are carried out through a one-pot method, a reaction container does not need to be transferred, and the operation is simple; according to the polyol solvent system, cyclization of the monoterpenoids becomes easier due to participation of polyol, and the conversion rate is increased; according to the dual-catalyst system, a combination of an acidic catalyst and a heterogeneous hydrogenation catalyst is used in a reaction container, so that efficient dehydration and hydrogenation reactions are ensured; the aromatic compound content in the fuel can be controlled by adjusting hydrogenation conditions.

The invention discloses a composition based on hollow glass beads and a preparation method thereof, and relates to the technical field of material science. The preparation method comprises the following steps: firstly, constructing a pre-composite functional microsphere with a specific hierarchical structure as a core basic functional unit, then matching with a plurality of components such as a thermosetting resin matrix, a latent curing system, a functional synergistic aid package and a composite solvent system, and matching with a preparation process which has a synergistic effect with the components. The composition based on the hollow glass beads is expected to realize uniform dispersion of the hollow glass beads in a coating system and strong bonding of a microscopic interface on the premise of ensuring the structural integrity of the hollow glass beads. Therefore, the high-performance composite coating material with ultra-light weight, high heat insulation efficiency, excellent mechanical strength and long-term service stability is obtained.

The invention discloses preparation of a high-uniformity cerium oxide abrasive material and application of the high-uniformity cerium oxide abrasive material in a chemical mechanical polishing solution. According to a method, cerium nitrate or cerium oxalate is used as a cerium source, a cationic or nonionic surfactant is used as a structure-directing agent, and the high-uniformity cerium oxide abrasive material is prepared in a mixed solvent system formed by water and isopropanol or water and diethylene glycol according to a specific volume ratio. The preparation method comprises the following steps: regulating the particle size and the morphology structure through a solvothermal reaction, carrying out cleaning, drying and high-temperature calcination treatment on a reaction product to obtain sphere-like cerium oxide nano-particles with high particle size concentration ratio, moderate surface roughness and good dispersity, adding cerium oxide powder into deionized water, and carrying out ultrasonic dispersion to obtain the spherical cerium oxide nano-particles. And sequentially adding a dispersing agent and amino acid while stirring, uniformly stirring, fixing the volume, and adding a pH regulator to enable the solution to be weakly acidic, thereby obtaining the chemical mechanical polishing solution. The cerium oxide submicron powder which is different in surface appearance, particle size and distribution uniformity is prepared by adjusting the solvent ratio and other reaction conditions.

The invention relates to the technical field of metal amino acid chelate preparation, and discloses high-bioavailability magnesium glycinate and a preparation method thereof.The method comprises the steps that a glycine solution and a magnesium salt solution are mixed, the initial pH value is adjusted to be within the alkaline range, and a low-polarity organic phase is added to construct a two-phase solvent system; dynamically adjusting the pH value of the reaction system by stages, and sequentially inducing amino and carboxyl of glycine to chelate magnesium ions step by step to form a chelate; and blending the chelated product with a chitosan-sodium alginate composite carrier, and carrying out spray drying to obtain magnesium glycinate particles. The molar ratio of magnesium ions to glycine in the chelating structure of magnesium glycinate is 1: 3. Through the synergistic effect of dynamic pH regulation and a two-phase solvent system, directional synthesis of the magnesium glycinate 1: 3 high-coordination chelate is achieved, the bioavailability and the targeted slow release performance are remarkably improved by combining a composite carrier nano embedding technology, and meanwhile, the process is efficient and environmentally friendly.

The invention discloses an anti-corrosion fireproof coating applied to a new energy battery box and a preparation method, and relates to the technical field of industrial coatings, the anti-corrosion fireproof coating comprises the following specific components: a base resin system, a curing agent, a functional filler system, a flame retardant system, a solvent system and an auxiliary agent system; the anticorrosive and fireproof coating further comprises additives, wherein the additives specifically comprise a functionalized MXene loaded lithium ion adsorbent, a metal organic framework encapsulated quaternary phosphonium salt, polyaryletherketone coated antimony trioxide nano-particles and boron-nitrogen co-doped graphene aerogel powder; the material is prepared based on the materials. According to the invention, multiple additives are synergistically introduced into a traditional basic coating system, and on the basis of a basic flame-retardant and anti-corrosion structure, lithium ion directional adsorption, gas-phase free radical active intervention, high-temperature carbonization barrier construction and three-dimensional thermal barrier network configuration are further realized; therefore, the multi-dimensional safety performance of the coating in battery thermal runaway, salt spray corrosion and high-temperature impact environments is remarkably improved.

The invention discloses a method for extracting and purifying flavone in litsea coreana through an ultrasonic-assisted eutectic solvent, and belongs to the technical field of green processing of natural products. The invention provides a method for efficiently preparing litsea coreana flavone by integrating computer prediction, green solvent extraction and resin purification technologies. The method comprises the following steps: firstly, calculating and screening a deep eutectic solvent system with the highest affinity with the litsea coreana flavone on the basis of a COSMO-RS theoretical model, then coupling the optimized DES with an ultrasonic-assisted extraction (UAE) technology, and through the synergistic effect of the DES and the UAE technology, remarkably improving the extraction rate of the litsea coreana flavone and furthest keeping the biological activity of a target component; then, a macroporous resin dynamic adsorption-desorption purification process is linked, so that high-selectivity enrichment and impurity removal of the flavonoid compounds in the crude extract are realized, a high-purity product is obtained, and a complete process route from intelligent screening, efficient extraction to precise purification is finally formed.

The invention discloses a cellulose coated diaphragm and a preparation method thereof in the field of lithium ion batteries, the diaphragm comprises alpha-cellulose pulp, a cellulose grafted phenylboronic acid-co-oligomeric ethylene oxide copolymer, a thermal response star zwitterionic polymer and nano aluminum oxide, and an N-methylmorpholine-N-oxide aqueous solution is adopted as a solvent system. The preparation method comprises the following steps: firstly synthesizing a cellulose grafted copolymer with dynamic borate bonds through atom transfer radical polymerization, then preparing a star polymer with thermal response arms and zwitter-ion terminals by taking cyclodextrin as a core, and finally mixing all the components to prepare coating slurry. And the composite diaphragm is prepared through the processes of coating, phase conversion, ultraviolet curing and drying. The diaphragm combines the thermal stability and lyophilic property of cellulose, forms a dynamic self-adaptive interface layer through the synergistic effect of two functional compounds, has the advantages of active safety protection, dendritic crystal inhibition, long cycle life and the like, and remarkably improves the comprehensive performance of the lithium ion battery.

The invention relates to the technical field of lithium batteries, in particular to a low-temperature electrolyte and a lithium battery containing the low-temperature electrolyte, the low-temperature electrolyte comprises the following components in percentage by mass: 75-85% of solvent, 11-18% of electrolyte salt and 0.5-2% of additive, the electrolyte salt comprises one or more of lithium hexafluorophosphate, lithium difluoro (oxalato) borate, lithium bis (fluorosulfonyl) imide and lithium bis (trifluoromethanesulfonyl) imide, and the additive comprises a film-forming agent, a low-temperature reinforcing agent and a dendritic crystal inhibitor. By optimizing the synergistic effect of the solvent system and the electrolyte salt, the freezing point and viscosity of the electrolyte are effectively reduced, the migration rate of lithium ions at low temperature is enhanced, and it is ensured that the battery can still be efficiently charged and discharged under the low-temperature condition.

The invention relates to the field of organic chemical synthesis, in particular to a synthetic method and application of pyrimidone compounds. The invention provides a synthesis method, reactants are o-amino heterocyclic formamide and triethyl orthoformate respectively, a solvent system is a hexafluoroisopropanol solvent, and a product is a heterocyclic pyrimidone compound. The reaction does not need strong acid or strong alkali conditions, does not need additional reducing agents or oxidizing agents, does not need transition metal catalysis, is economical and practical, the reaction conditions are relatively mild, and the synthesized pyrimidone compound has a good antibacterial effect.

The invention belongs to the technical field of cellulose dissolution, and particularly relates to a method and a solvent for promoting cellulose dissolution and application of the solvent in preparation of high-strength regenerated cellulose fibers. The invention finds for the first time that when a common solvent system of silicon dioxide and cellulose is subjected to ball-milling mixing, the obtained solvent composition not only improves the solubility of the cellulose, but also can obtain a stable spinning solution after dissolving the cellulose, and improves the strength of the regenerated cellulose fiber prepared from the solvent composition.

The present disclosure relates to stick compositions including 2,4-bis-{[4-(2-ethyl hexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, at least one solvent for solubilizing the bemotrizinol, and at least one lipophilic gelling agent, as well as to methods of making and using such compositions.

The invention discloses a preparation method of EVOH, and relates to the technical field of EVOH. According to the method, a low-temperature (0-5 DEG C) methanol-n-hexane mixed solvent system is creatively adopted and matched with a penetration enhancer to realize synergistic extraction, so that synchronous and deep removal of polar and non-polar small molecular impurities in the EVA is finally realized, the content of impurities in the EVA is remarkably reduced, and the self-polymerization reaction of residual monomers is effectively inhibited; therefore, a key guarantee is provided for subsequent preparation of high-quality EVOH products. The film processed by the EVOH prepared by the invention has the characteristics of few crystal points and high product quality, and can be applied to the field of high-barrier packaging film materials.

The present invention relates to a process for the manufacture of a water-soluble n-type conductive polymer, the process comprising the steps of: a) adding a monomer to a solvent system comprising water in the presence of a catalyst, thereby providing a reaction solution; b) allowing the monomer to polymerize in the reaction solution, thereby obtaining an n-type conductive polymer solution; and c) performing post-treatment on the n-type conductive polymer solution to obtain the water-soluble n-type conductive polymer.

The invention relates to the technical field of high polymer materials, and discloses a preparation method and application of polystyrene-divinyl benzene composite microspheres, and an environment-friendly solvent system, such as a water-based or non-toxic organic solvent, is adopted to replace a traditional organic solvent. The solvent pollution risk can be reduced by using water-phase emulsion polymerization, meanwhile, the recovery and treatment of the solvent are simplified, the surfactant is optimized, the low-toxicity and environment-friendly surfactant is selected for emulsion stabilization, and chemical substances harmful to the environment and the human body are prevented from being used. By optimizing a polymerization process, accurately controlling the crosslinking degree and introducing a green solvent and an environment-friendly surface modification method, the improved polystyrene-divinyl benzene composite microsphere overcomes some defects (such as high cost, non-uniform particle size, difficulty in controlling the crosslinking degree and the like) in the prior art; in addition, the method has wider application potential in a plurality of fields (such as coatings, medicines and catalysis), and has better environmental protection property, health safety and the like.

The invention discloses an OCA (Optical Clear Adhesive) solution for a folding screen protective film, the OCA solution comprises an optical raw adhesive, a curing agent and a first solvent, the raw adhesive is prepared from the following raw materials in parts by mass: 270-283 parts of 2-ethylhexyl acrylate, 50-62 parts of butyl acrylate, 318-330 parts of methyl acrylate, 40-55 parts of acrylic acid, 1-2 parts of gamma-acryloyloxypropyltrimethoxysilane, 2.1-2.3 parts of an initiator and 1250-1350 parts of a second solvent; the second solvent comprises methylbenzene and ethyl acetate. According to the OCA optical glue solution for the folding screen protection film, raw glue is prepared from the isooctyl acrylate, the butyl acrylate, the methyl acrylate, the acrylic acid, the gamma-acryloyloxy propyl trimethoxy silane and the initiator in a toluene and ethyl acetate compounded solvent system, and an OCA glue layer with excellent stripping force, light transmittance, holding power and bending resistance is obtained after curing; and the cost of the raw materials is optimized, and the method is more economical.

An improved solvent system for the formulation and application of N-alkyl thiophosphoric triamide urease inhibitors. These formulations provide safety and performance benefits relative to existing alternatives and enable storage, transport and subsequent coating or blending with urea based or organic based fertilizers. These formulations are comprised primarily of environmentally friendly aprotic and protic solvents (particularly dimethyl sulfoxide and alcohols / polyols) to stabilize the urease inhibitor.

The invention discloses an electrolyte and a battery. The electrolyte comprises a solvent, a lithium salt and an additive, the solvent comprises acetonitrile and carboxylic ester, the additive comprises a first additive, a second additive and a third additive, the first additive is at least one of phosphate, borate, fluorophosphate and fluoborate with a film-forming potential of 1.3-2V, and the third additive is at least one of lithium salt and fluoborate with a film-forming potential of 1.3-2V. The second additive is at least one of a sulfur-containing additive, a boron-containing additive and a phosphorus-containing additive, and the third additive is a negative electrode film-forming additive; and Y is more than 0.025 and less than 60. According to the invention, a solvent system and an interface film forming mechanism of the electrolyte are synergistically regulated and controlled, so that the core problem of violent side reaction between the acetonitrile-based electrolyte and the negative electrode is solved, and meanwhile, the combination of high energy density and ultrafast charging performance is realized. The electrolyte is suitable for high-energy-density, wide-temperature-range and fast-charging type lithium iron phosphate batteries.

The invention relates to a silicon-carbon negative electrode material and a preparation method and application thereof, in particular to a liquid-phase in-situ polymerization coating-based silicon-carbon negative electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a silicon-carbon composite precursor and a solvent according to a certain mass ratio, and uniformly stirring to form a solvent system; adding an organic carbon source into the solvent system, and uniformly stirring to form an organic precursor solution; carrying out hydrothermal reaction on the organic precursor solution, so that an organic carbon source is subjected to in-situ polymerization reaction on the surface of the silicon-carbon composite precursor to form a compact coating layer, and obtaining an intermediate product; and carrying out heat treatment on the intermediate product, discharging, and sieving to obtain the silicon-carbon negative electrode material based on liquid-phase in-situ polymerization coating, when the silicon-carbon negative electrode material is used for preparing a negative electrode plate and assembling the negative electrode plate into a lithium ion battery, the first-cycle coulombic efficiency and the cycle performance of the lithium ion battery can be improved.

The invention provides a piperazinyl steric hindrance type liquid-solid phase change carbon trapping agent and a preparation method thereof, and relates to the field of liquid-solid phase change trapping of CO2. Alkylamine and the like are used as raw materials, piperazinyl steric hindrance type organic amine with secondary amino and tertiary amino structures is designed, and the piperazinyl steric hindrance type organic amine is prepared through ring-opening addition, nucleophilic substitution, cyclization, hydrogenation and other reactions. The piperazinyl steric hindrance type organic amine is compounded with a solvent and a functional additive to prepare the piperazinyl steric hindrance type liquid-solid phase change carbon trapping agent. According to the steric hindrance type phase change carbon trapping agent, on the basis of the electron donating effect of alkyl, the absorption rate of trapping CO2 is increased by 2.2 times compared with that of traditional steric hindrance amine (AMP); on the basis of the steric hindrance effect of the tertiary amine site, the hydrogen-bond interaction between carbamate and the solvent is weakened, liquid-solid phase splitting after the aqueous solution carbon capture system absorbs CO2 is promoted, the problem of poor cycling stability of a non-aqueous solvent system is solved, and the capture efficiency and enrichment degree of CO2 are improved.

The application discloses a thickened oil viscosity reducer for a main viscosity contribution component of colloid and a preparation method thereof. The thickened oil viscosity reducer comprises the following components in percentage by weight: diethylene glycol methyl ether 25-35%, propylene glycol formate 15-25%, dispersant 5-8%, chelating agent 2-4%, anti-coking agent 0.5-1%, anti-swelling agent 1-2% and corrosion inhibitor 1-2%; and the balance is water. The application is a polar + non-aromatic hydrocarbon solvent system; completely avoids high-risk substances such as nonylphenol polyoxyethylene ether, petroleum sulfonate sodium and organic chlorine; is designed in pertinence and can effectively inhibit metal-induced asphaltene bridging; can withstand working conditions from normal temperature to 250 DEG C and up to 300 DEG C; thermal stability is significantly enhanced, and residual carbon after aging is lower than 8%; viscosity reduction efficiency is higher; the system is more stable, flexible in compounding and suitable for field construction.

The invention discloses biomass environment-friendly color paste as well as a preparation method and application thereof, and belongs to the technical field of dye color paste. The color paste comprises 10-20 parts of a biomass material, 15-50 parts of water-based resin, 20-60 parts of an environment-friendly solvent, 0.5-5 parts of a dispersant, 5-30 parts of a pigment, 0.05-1% of a preservative and 5-10 parts of an antioxidant. According to the invention, the synergistic effect of the biomass material and the antioxidant is combined with the water / alcohol mixed solvent system, so that the physical-chemical dual antioxidant barrier of the color paste is realized. During preparation, the biomass material and the solvent are mixed to form premixed liquid, then the resin, the dispersing agent and the antioxidant are sequentially added for high-speed dispersion, and finally grinding is performed until the particle size is smaller than or equal to 10 microns. The color paste effectively solves the technical problems that the traditional color paste is easy to oxidize and fade and uneven in dispersion, and is suitable for the fields of environment-friendly coatings, inks and cotton and linen fabric printing and dyeing.

The invention relates to the field of adsorption materials, and provides a preparation method of a multi-dimensional layer adsorption material for wastewater treatment. Firstly, a titanium-containing precursor solution is prepared through an ice template method, and an oriented porous titanium dioxide precursor framework is formed; and then, carrying out high-temperature calcination to obtain the columnar porous titanium dioxide adsorption material. Then, in-situ growth of an iron-containing metal organic framework (MOF) nanowire is carried out in the pore channel of the titanium dioxide adsorption material, and directional growth of the nanowire is realized by controlling the concentration of metal salt, a solvent system and magnetic field induction. And finally, multi-stage purification and structure stabilization treatment are adopted, so that the mechanical stability and the adsorption performance of the material are improved. By optimizing the pore structure and MOF loading, the adsorption capacity and degradation efficiency of the material to pollutants are improved, the problems that a traditional material is insufficient in mechanical strength and poor in stability are solved, and the material is suitable for efficient wastewater treatment.

An inhibited aqueous fertilizer composition and methods of use thereof.

The application belongs to the technical field of high polymer materials, and particularly relates to an ion conductive hydrogel, a sensor and a preparation method and application thereof. The ion conductive hydrogel comprises a double-network hydrogel and ion salts and alcohol dispersed in the double-network hydrogel; the first network of the double-network hydrogel is formed by cross-linking of sodium alginate, and the second network is formed by radical polymerization of unsaturated monomers. The second network is formed by radical polymerization of unsaturated monomers, and the double-network hydrogel is formed by cooperation of sodium alginate, so that the ion conductive hydrogel has excellent mechanical properties. The ion salts are added in the double-network hydrogel, and especially, an alcohol / water binary solvent system is introduced. Due to strong ion hydration and strong hydrogen bond interaction between water molecules and alcohol, ice crystallization is inhibited, so that the hydrogel still has good flexibility and conductivity below zero degrees.

Described herein is a topical formulation. The topical formulation includes a thymine-thymine compound including Formula (1) and a solvent system. The topical formulation includes about 0.01 wt% to about 10 wt% of the thymine-thymine compound, based on total weight of the formulation. A method of preparing the topical formulation is also provided.

The invention discloses a method for recycling silicon industry by-product silicon tetrachloride based on gallium electrode electro-deposition, which is used for solving the problems of low solubility and crystal structure in the process of preparing silicon by an electro-deposition method. According to the method, a deep eutectic solvent system composed of 1, 3-dimethyl-2-imidazolinone and 1, 3-dimethylurea is adopted to efficiently absorb silicon tetrachloride in a green manner and prepare the electrolyte, and the electrolyte is converted into high-purity, uniform and compact silicon crystals by using a liquid gallium electrode electrodeposition technology, so that effective conversion from wastes to high-added-value materials is realized. Meanwhile, the low-toxicity eutectic solvent which is easy to prepare and has good biodegradability is adopted to replace traditional ionic liquid or other chemical reagents, so that the safety, the environmental protection property and the sustainability of the process are remarkably improved, and the treatment cost and the environmental burden are reduced at the same time.

The invention relates to a lithium ion battery. In order to solve the problem that the performance of the battery is influenced by solvent decomposition and gas production due to the fact that active oxygen is released in the using process when a lithium supplementing agent is added, a solvent ethylene carbonate in an electrolyte is promoted to be subjected to a ring-opening reaction, and the lithium ion battery comprises a positive electrode, a negative electrode, a diaphragm and the electrolyte, the positive electrode comprises a positive electrode active material and a lithium supplement agent, the electrolyte comprises an organic solvent, a lithium salt and an additive, the organic solvent comprises fluoro carboxylic ester, fluoro ether and carbonic ester and does not contain ethylene carbonate, and the additive comprises trimethylsiloxyethyl isocyanate and / or 2-(1, 1-thiophane-3-dioxide)-2, 2-methyl difluoroacetate. Through the synergistic effect of the solvent system and the additive, the stability of the electrolyte in a battery containing a lithium supplement agent is improved, the wettability and low-temperature performance of the battery, especially a high-compaction battery, are improved, and meanwhile, the lithium ion battery has relatively good normal-temperature cycle performance and high-temperature performance.

The invention discloses a preparation process of a moxidectin pouring solution. The preparation process comprises the following steps: S1, respectively preparing a moxidectin initial solution and a thickener premixed solution; s2, the moxidectin initial solution and the thickener premixed solution are stirred and mixed uniformly at the temperature of 25-35 DEG C to form a mixture A, the stirring speed is 150-250 rpm, and the mixing time is 10-20 min; s3, adding auxiliary materials into the mixture A, and uniformly mixing to form a mixture B; s4, supplementing the second solvent into the mixture B to the total amount, uniformly mixing, and filtering to obtain a moxidectin pouring solution; the method comprises the following steps: dissolving a moxidectin raw material in a first solvent to obtain a moxidectin initial solution, and synthesizing the moxidectin raw material by using biological catalysis; the first solvent is a nano-emulsion formed after homogenization. According to the preparation method, the solubility of the medicament, the stability of the preparation and the transdermal drug delivery efficiency are improved by improving the solvent system and controlling the process in the preparation process of the moxidectin pouring solution.

The invention relates to a preparation method of an insect-proof lyocell fiber, and belongs to a functional fiber preparation method in the chemical field. The invention provides a bio-based microcell barrier packaging solution aiming at three major defects of easy breakage, non-environmental response release and toxicity of a chemical cross-linking agent in the existing microcapsule coating. The pH response type microcapsule is constructed through double-layer alternate self-assembly of chitosan and phytic acid, a compact network barrier is formed by electrostatic crosslinking of positive and negative charges, and the structural stability is enhanced by combining a natural cross-linking agent genipin; in the fiber loading stage, plasma pretreatment is adopted to increase the surface roughness, vacuum negative pressure drives microcapsule permeation, and steam setting promotes anchoring setting. Core innovations include an intelligent release mechanism, washability breakthrough, ecological safety and actually measured performance display. The method solves the problem that the lyocell fiber is difficult to decompose the permethrin in the NMMO solvent system, and has the advantages of efficient protection and environmental friendliness.