97 results about "Butanedioic acid" patented technology

The application relates to the field of genetic engineering, and discloses an Aspergillus niger, a construction method and application of the Aspergillus niger, and a method for producing citric acid and / or succinic acid. Aspergillus niger The Aspergillus niger is obtained by simultaneously overexpressing alpha-amylase and aspartic protease in a starting strain. The Aspergillus niger provided by the application can realize efficient degradation and conversion of starch by synergistically overexpressing amyA genes and pepA genes, solve the technical bottleneck that the original strain is limited in growth in a starch-based fermentation system and has insufficient acid production capacity, can efficiently produce succinic acid and citric acid by taking low-cost starch as the only carbon source, significantly reduce the industrial production cost of organic acid, and promote the green and sustainable upgrading of the fermentation industry.

This invention discloses a silicon-based anode binder for lithium-ion batteries and its preparation method, relating to the field of silicon-based anode technology. The method includes first ring-opening sulfonation of polyetheramine with 1,3-propanesulfonyl lactone in an aqueous phase to obtain sulfonated polyetheramine; then, polyacrylic acid is activated by EDC·HCl and NHS and then amidated and grafted onto the sulfonated polyetheramine to obtain sulfonated polyetheramine-grafted polyacrylic acid; finally, the aqueous solution of this graft is in-situ coordinated with 2-methylimidazole and zinc nitrate to generate ZIF-8 nanoparticles, and then succinic acid and choline chloride are added for regulation to obtain the binder. This invention achieves dual modification through molecular grafting of flexible sulfonated polyether segments and in-situ construction of a three-dimensional ZIF-8 conductive network, utilizing succinic acid and choline chloride to eliminate competitive coordination of active groups, significantly improving ionic conductivity and stabilizing the electrode structure.

Provided are a resin composition having satisfactory impact resistance at low temperatures and having bleed resistance and biodegradability, a molded body, and a modifier for poly(butylene succinate)-based polymers. The resin composition comprises a polyester-based polymer (A) and a poly(butylene succinate)-based polymer (B), wherein the polyester-based polymer (A) comprises units of one or more polyhydric alcohols (a1) and units of one or more polycarboxylic acids (a2), the polyhydric alcohols (a1) including at least one diol selected from the group consisting of C3-C12 linear aliphatic diols and C3-C12 branched aliphatic diols and the polycarboxylic acids (a2) including a C4-C16 linear aliphatic dicarboxylic acid and a C4-C16 branched aliphatic dicarboxylic acid.

The application relates to a salt type of a new cell cycle regulatory kinase inhibitor and a crystal form and a preparation method thereof, and relates to a succinate salt of a compound (6-((4-(2-(diethylamino)benzo[d]thiazol-6-yl)-5-fluoropyrimidin-2-yl)amino)pyridin-3-yl)(4-isopropylpiperazin-1-yl)methanone and a crystal form thereof, wherein two crystal forms II and III of the succinate salt are good in stability, high in solubility, and the preparation method is simple and suitable for industrial production.

This invention relates to the field of bionanomaterials technology, and particularly to mitochondrial-targeting nanomaterials capable of releasing HNO, their preparation methods, and applications. The preparation method of the mitochondrial-targeting nanomaterials capable of releasing HNO includes the following steps: synthesis of a silanized HNO donor: hydroxylamine hydrochloride is dissolved in a mixed solvent of anhydrous tetrahydrofuran and anhydrous pyridine, and a dichloromethane solution of 2-(4-chlorosulfonylphenyl)ethyltrimethoxysilane is added. The mixture is stirred at room temperature, and after post-treatment, a silanized HNO donor is obtained; synthesis of aminated carbon dots: chitosan, ethylenediamine, and mercaptosuccinic acid are dispersed in deionized water, and concentrated hydrochloric acid is added and stirred until dissolved. This preparation method can prepare mitochondrial-targeting nanomaterials capable of releasing HNO, achieving precise delivery, controlled release, and visual tracking of HNO to cardiac mitochondria, solving the technical problems of traditional HNO donors' inability to achieve stable loading on carriers and lack of mitochondrial targeting ability.

This invention discloses a method for preparing a high-barrier biodegradable material, comprising the following steps: A) Raw material pretreatment: Drying solid raw materials separately in a vacuum drying oven at 60-80℃ for 6-12 hours until the moisture content is below 0.05%; B) Melt blending: Mixing the dried raw materials with the remaining raw materials in a specific ratio until homogeneous. This invention significantly improves the barrier properties of the material through the synergistic effect of benzyl glycidyl ether, transesterification modified monomers, 1,4-succinic acid, nano-montmorillonite, and epoxy-modified graphene oxide. A balanced mechanical property is achieved through the rational ratio of polylactic acid and polybutylene adipate-terephthalate, as well as the effects of catalysts, chain extenders, and compatibilizers. The material achieves a degradation rate of 85.2% within 90 days, exhibiting good biodegradability and meeting environmental protection requirements. Through an optimized melt blending process, the material possesses good processing performance and can be molded using conventional plastic processing equipment, facilitating industrial production.

The present application relates to the technical field of food packaging materials, and particularly relates to an oil-proof packaging material for food contact paper and a preparation process thereof. The oil-proof packaging material for food contact paper is prepared by the following steps: preparing a citraconic acid fermentation liquor, preparing methyl succinic acid by hydrogenation reaction of the citraconic acid, and preparing the oil-proof packaging material for food contact paper. The present application realizes the full-chain green preparation from straw to bio-based methyl succinic acid, and produces degradable polymer particles on the basis. The bio-based methyl succinic acid endows the oil-proof packaging material for food contact paper with the characteristics of renewability and biodegradability, helps to solve the problem of plastic pollution, and in terms of material performance, the introduction of bio-based monomers can optimize the polymer chain structure, improve the barrier effect of the film on oil, make the film thinner and tougher, and thus improve the oil-proof capacity.

The present application relates to a kind of tetrahydrofuran and its preparation method, belong to synthetic technical field.The purity of tetrahydrofuran is ≥99.990%, does not contain succinic anhydride and methyl tetrahydrofuran, and the rest is impurity;Impurity includes γ-butyrolactone, content ≤0.009%, 1,4-butanediol, content ≤0.004%.Its preparation includes the following steps: maleic anhydride solution and hydrogen are introduced into the reactor loaded with supported catalyst to carry out reaction, then after separation and purification, tetrahydrofuran is obtained;Wherein the preparation of catalyst includes the following steps: S1, to pitch and molybdenum disulfide are heat treated, and porous carbon / molybdenum disulfide carrier is obtained;S2, nickel precursor and hydrophobic compound are dispersed in water, and mixed solution is obtained;The structural formula of hydrophobic compound is n ≥6;S3, porous carbon / molybdenum disulfide carrier is immersed in mixed solution, after aging, drying and heat reduction treatment, supported catalyst is obtained, and the final goal that product purity can reach 99.99% or more is achieved.

The invention relates to the technical field of tin alloy solder, and discloses a preformed soldering lug with high welding strength, which comprises a soldering flux layer and a soldering lug main body, the soldering flux layer comprises esterified rosin, methyl ester, succinic acid, glutaric acid, cyclohexylamine hydrochloride and isopropanol; the soldering lug main body comprises tin, antimony, silver, bismuth, copper and nickel; by adding silver, bismuth, copper, nickel and metal elements in the alloy into the soldering lug, the mechanical strength of the solder alloy can be improved, compared with common tin-copper alloy, the mechanical strength of the soldering lug is greatly improved, the soldering flux is high in activity but low in corrosivity, stable high-mechanical-strength intermediate layer alloy is formed, and the soldering flux can be applied to the field of soldering. The welding strength and the tensile strength are more excellent, the soldering flux layer and the soldering lug main body have the synergistic effect, so that a welded part has high tensile property after being welded, and the mechanical strength of the solder alloy can be improved by adding silver, bismuth, copper and nickel in the alloy into the soldering lug and metal elements.

The present application relates to a kind of biological gamma-butyrolactone and its production method, the production method of biological gamma-butyrolactone of the present application includes the following steps: preparation biological succinic acid solution;The obtained biological succinic acid solution and hydrogen continuously enter the fixed bed containing nickel copper catalyst and carry out hydrogenation reaction, obtain crude product;The obtained crude product enters separation column and is separated and purified, obtain biological gamma-butyrolactone;Nickel loading in the nickel copper catalyst is 30wt%~60wt%, copper loading is 1wt%~5wt%, the content of hydrophobic compound is 0.01wt%~0.2wt%.The present application is prepared by 5wt%~30wt% biological 1,4-butanedioic acid dilute solution continuously into fixed bed hydrogenation reactor, and biological gamma-butyrolactone liquid is prepared, continuously enters rectification separation column and is separated, and biological gamma-butyrolactone product with purity ≥99.99% can be prepared, and the rest is impurity;The impurity includes tetrahydrofuran and 1,4-butanediol;The content of tetrahydrofuran is ≤0.004%;The content of 1,4-butanediol is ≤0.005%.

This invention relates to the field of succinic anhydride hydrolysis reaction detection technology, and discloses a method for detecting the succinic anhydride hydrolysis reaction rate using high performance liquid chromatography (HPLC). The method includes the following steps: (1) diluting the succinic anhydride hydrolysis reaction product with acetonitrile to obtain the test solution; (2) analyzing the test solution using HPLC, with a diode array detector, a reversed-phase column, and a mobile phase of a mixture of acetonitrile and water, and quantifying using the external standard method. The method provided by this invention utilizes ultra-high performance liquid chromatography (UHPLC) to simultaneously determine the content of succinic anhydride and succinic acid in the reaction solution, and has the advantages of rapid detection, simple method, and good repeatability.

This invention discloses a compound modified masterbatch for improving the heat-sealing strength of PLA tea bags and its preparation method, belonging to the field of polymer materials technology. By weight, it comprises the following components: 35-50 parts polylactic acid carrier; 18-28 parts toughening agent; 3-8 parts composite nucleating agent; 1-4 parts crystallization promoter; 2-5 parts interface compatibilizer; and 0.5-2 parts antioxidant. The toughening agent is a blend of polybutylene adipate-terephthalate and polybutylene succinate in a mass ratio of (1.5-2.5):1. The composite nucleating agent is composed of an organophosphate nucleating agent and an acylhydrazine compound in a mass ratio of 1:(0.8-1.5). This invention systematically improves the heat-sealing strength of PLA tea bags from three dimensions—toughening, nucleation, and promotion—from the perspectives of interfacial adhesion, crystal structure, and molecular motion, overcoming the limitations of single modification methods.

The utility model discloses a decoloring device for biological production of succinic acid, including the casing, casing inner chamber upper portion installs and drives the disc and the driven disc that sets up symmetrically along the vertical direction, installs a plurality of from inside to outside the active carbon filter element of setting in proper order by the drive disc and driven disc between, and the number of a plurality of active carbon filter elements increases from inside to outside in proper order, and the drive disc and driven disc are connected with through the multiple connecting rods of circumferential distribution, the top of drive disc is fixed with drive shaft connection, and the driven disc bottom is fixed with driven shaft connection, and the axis of drive shaft and driven shaft is arranged in line, drive shaft inside hollow, and the top of drive shaft is connected with the feed pipe through the swivel joint. The decoloring device provided by the utility model can solve the problems of low decoloring efficiency and long time, and can also solve the problems of uneven decoloring and unstable effect.

The present application relates to the technical field of pesticide preparation, in particular to a microemulsion containing fluroxypyr-isooctyl and aminoclopidol and a preparation method thereof, which is composed of the following components in percentage by mass: fluroxypyr-isooctyl 1-15%, aminoclopidol 1-15%, composite emulsifier 10-22%, co-emulsifier 5-11%, composite solvent 15-28%, antifreezing agent 2-6%, stabilizer 0.5-2.5%, and deionized water, with the total being 100%. The composite emulsifier is composed of dioctyl sodium sulfosuccinate and triphenyl ethenyl phenol polyoxyethylene ether phosphate triethanolamine salt, the composite solvent is composed of N,N-dimethyl decanamide and ethylene glycol diacetate, the stabilizer is composed of epoxidized soybean oil and citric acid, the co-emulsifier is dipropylene glycol methyl ether, and the antifreezing agent is glycerol. The microemulsion containing fluroxypyr-isooctyl and aminoclopidol and the preparation method thereof effectively solve a plurality of technical problems in the compounding process of the two active ingredients and have significant technical advantages.

The application discloses an antibacterial self-cleaning PBS-based composite material and a preparation method thereof, and relates to the technical field of polybutylene succinate. The composite material is composed of the following components: PBS resin, PBAT resin, talcum powder, nano-titanium dioxide, zinc oxide, antibacterial powder, a compatilizer, a lubricant and an antioxidant. The particle size range, surface treatment mode and distribution state of the nano-titanium dioxide, zinc oxide and antibacterial powder in the PBS matrix are synergistically controlled, and a stable interface bonding structure is constructed in combination with the compatilizer, so that the functional components form an active region with continuity and high exposure on the material surface, the synergistic improvement of the antibacterial performance and the self-cleaning performance is realized, the problems of easy agglomeration of the functional filler, low utilization rate of active sites and unstable functional effect in the prior art are significantly improved, and the surface cleaning maintenance ability and long-term use reliability of the material in a complex use environment are improved.

This invention relates to a polyester resin for 50 / 50 blended powder coatings. This polyester resin is obtained by reacting raw materials including glycerin black lead, ethylene glycol, diethylene glycol, terephthalic acid, 4,4'-biphenyl dicarboxylic acid, succinic acid, and pyromellitic dianhydride. The resulting product exhibits good impact resistance, a gloss level generally above 92%, and other properties such as adhesion that basically meet the application requirements of 50 / 50 blended powder coatings. Due to the comprehensive utilization of the effective components of glycerin black lead, it has the advantages of low cost and outstanding environmental performance.

This invention discloses a method for constructing a high-succinic acid-producing Pichia pastoris cell factory, using Pichia pastoris (… Komagataella phaffii Using GS115 as the chassis, a reductive TCA cycle enhancement strategy and an sdh5 knockout strategy were first constructed, respectively. It was found that a single strategy was insufficient to effectively achieve succinic acid accumulation. Further, the two strategies were combined to obtain the engineered strain SAOG, which achieved succinic acid accumulation. Based on this, the malate transporter SpMAE was introduced to enhance the transmembrane transport capacity of succinic acid, and histidine auxotrophic recovery was combined to improve the growth and fermentation performance of the strain, resulting in the engineered strain SH, whose succinic acid accumulation was 25.1% higher than that of SAOG. Finally, the engineered strain SH achieved a succinic acid yield of 10.47 g / L in shake-flask fermentation and 112.6 g / L after 120 h of continuous fed-batch fermentation in a 5 L fermenter. This invention achieves efficient succinic acid synthesis in the Pichia pastoris chassis through the synergistic regulation of reductive TCA pathway enhancement, succinic acid oxidation blocking, enhanced transmembrane transport, and auxotrophic recovery, exhibiting stable fermentation performance, high yield, and good industrial application potential.

The application belongs to the technical field of fertilizers, and particularly relates to a medium-element liquid fertilizer and a preparation method thereof. The medium-element liquid fertilizer comprises 52.5wt%-53.5wt% calcium nitrate tetrahydrate, 4.44wt%-4.56wt% medium-element nitrate, 0.09wt%-0.11wt% manganese nitrate solution with a concentration of 50wt%, 5.95wt%-6.05wt% first chelating agent, 1.45wt%-1.55wt% second chelating agent, 0.39wt%-0.41wt% compound amino acid, 0.49wt%-0.51wt% boric acid, 0.39wt%-0.41wt% first active substance, 0.29wt%-0.31wt% second active substance, 0.29wt%-0.31wt% alginic acid, and the balance of water. The mass ratio of the first active substance to the second active substance is 4:3. The first active substance is diethylaminoethanol succinate citrate, and the second active substance is fatty alcohol citric acid monoester dipotassium salt. The preparation method adopts a sugar alcohol and citric acid monohydrate mild room temperature double-chelating process, so that the fertilizer has both quick-acting and sustained-acting properties. The medium-low temperature chelating process has high chelating degree and good fertilizer mixing property.

The present application relates to the field of new material fine chemicals, and particularly relates to a low-cost preparation of a series of carbon four (C4) diacid (ester) by using coal chemical industry abundant oxalate and / or glycollic acid (ester) bulk raw materials, including butene diacid (ester), succinic acid (ester), tartaric acid (ester), and / or malic acid (ester) and the like, and the process features are that all of the coal chemical industry abundant carbon monoxide (synthesis gas), methanol, or formaldehyde and the like bulk C1 raw materials are used, and a series of C4 skeleton products are simply and efficiently prepared. The technology practices outstanding cost reduction and efficiency improvement results, and is beneficial to large-scale preparation of high-value chemicals relying on rich coal resources in China.

This disclosure pertains to the field of phosphogypsum technology, specifically relating to a hemihydrate phosphogypsum gel material, its preparation method, and its applications. The gel material is prepared using hemihydrate phosphogypsum, an alkaline activator, and a water-reducing agent. This reduces water consumption while achieving a good retarding effect. By introducing silicate compounds and crystal form regulators with succinic acid groups and silane groups, the synergistic effect of these compounds and regulators provides a cementing network for the dihydrate phosphogypsum crystals, increasing bonding strength and thus improving the strength of gypsum products. Therefore, the hemihydrate phosphogypsum gel material provided by this disclosure maintains the mechanical properties of the gel material while reducing water consumption and extending setting time.

This invention discloses a polycarbonate polyester composition, its preparation method, and its applications, relating to the technical field of plastics. The polycarbonate polyester composition of this invention comprises the following components in parts by weight: 44-93 parts polycarbonate; 14-46 parts poly(butylene terephthalate); 0.9-12 parts toughening agent; 4-12 parts flame retardant; 0.4-3.2 parts synergistic flame retardant; and 0.09-6 parts anti-dripping agent. The flame retardant is hexaphenoxycyclotriphosphazene, and the synergistic flame retardant includes a silane coupling agent and aluminum diethylphosphonate. The mass ratio of the silane coupling agent to aluminum diethylphosphonate in the synergistic flame retardant is (0.4-2):100. The polycarbonate polyester composition of this invention features halogen-free flame retardancy, high heat resistance, and high toughness.

This invention provides an aliphatic polyester, a polyester composition comprising the same, and their applications, belonging to the technical field of biodegradable polyester materials. The aliphatic polyester comprises diacid residues and diol residues: the diacid residues include the following residues: a1), 61.2–69.1 mol% succinic acid residues based on a1) and a2), based on a total molar percentage of 100 mol% of a1) and a2), and a2), 30.9–38.8 mol% sebacic acid residues based on a1) and a2), based on a total molar percentage of 100 mol% of a1); the diol residues are selected from 1,4-butanediol residues in at least an equimolar amount as the diacid residues; the mass percentage of oligomers with a number average molecular weight <650 in the aliphatic polyester is 1.09–3%; and the molecular weight distribution coefficient of the aliphatic polyester is 1.72–2.83. The aliphatic polyester exhibits good high-speed blown film forming performance, retains excellent opening performance after high-speed blown film forming, and also possesses excellent puncture resistance.

This invention discloses a highly dispersible lubricating oil composition, its preparation method, and a diesel engine oil, belonging to the field of lubricating oil technology. The lubricating oil composition, by mass percentage, comprises: detergent, 1%–6%; dispersant, 1%–8%; corrosion inhibitor, 0.1%–5%; antioxidant, 0.1%–6%; viscosity index improver, 0.1%–4%; base oil, balance; wherein the dispersant is selected from succinimidyl-succinate polymers. The highly dispersible lubricating oil composition and diesel engine oil provided by this invention exhibit excellent dispersing and detergency properties.

This application relates to the field of film packaging technology, and particularly to a high-toughness biaxially oriented polyglycolic acid (PGA) film and its preparation method. The film has a three-layer structure: the upper and lower surface layers comprise an anti-sticking masterbatch and a PGA composite resin, and the core layer comprises a PGA composite resin. The composite resin comprises PGA, a PGA toughening agent, a hydroxyl fatty acid ester, a chain extender, and an antioxidant. The PGA toughening agent is a copolymer polymerized from ε-caprolactone, glycolide, succinic acid, and butanediol, and the hydroxyl fatty acid ester is poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) with a 3-hydroxyhexanoate unit molar content ≥25%. This application achieves synergistic toughening through the toughening agent and PGA, combined with the chain extender and antioxidant, significantly improving film toughness and processing stability while ensuring high barrier properties, high transparency, and high strength, making it suitable for high-requirement packaging applications.

The application discloses a production method of high-performance recyclable BOPP film, and the high-performance recyclable BOPP film comprises an outer layer, a middle layer and an inner layer; the outer layer is composed of homopolymer polypropylene, polylactic acid, polyhydroxybutyrate, polypropylene carbonate, polystyrene-acrylonitrile copolymer, an antioxidant, an ultraviolet absorber and a slip agent; the middle layer is composed of homopolymer polypropylene, thermoplastic starch, polycaprolactone, polyethylene terephthalate, maleic anhydride grafted polypropylene, a fiber reinforcing agent and methyl methacrylate-butadiene-styrene copolymer; and the inner layer is composed of random copolymer polypropylene, polybutylene succinate, polyvinyl alcohol, PA6, an antistatic agent and an antibacterial agent. The BOPP film prepared by the method has good performance, is environment-friendly and recyclable.

This invention relates to the field of industrial lubricant additives, specifically to a novel multifunctional industrial oil compound, comprising, by weight, a sulfurized olefin extreme pressure anti-wear agent, a phenolic antioxidant, an amine antioxidant, a phosphate ester anti-wear agent, a boronized phosphorus-containing polyisobutylene succinimide dispersant, a thiocarbamate, dodecenyl succinic acid, and a metal deactivator; the weight ratio of the sulfurized olefin extreme pressure anti-wear agent to the phosphate ester anti-wear agent is 1.2:1 to 5:1; the number average molecular weight of the boronized phosphorus-containing polyisobutylene succinimide dispersant is 1000 to 3000. The novel multifunctional industrial oil compound provided by this invention, through scientific formulation design and optimized preparation process, effectively solves the technical defects of existing industrial oil compound agents and possesses multiple significant beneficial effects.