2037 results about "Butanedioic acid" patented technology

A method of treating a treatment zone in a well to reduce the permeability of the treatment zone including the steps of: introducing into the treatment zone a water-based treatment fluid comprising: an aqueous silica sol; and a water-soluble chemical activator for gelling the silica sol, wherein the chemical activator is selected from the group consisting of: phytic acid, methylglycinediacetic acid, a water-soluble polyepoxysuccinic acid, salicylic acid, ascorbic acid, tannic acid, and an alkali metal salt or ammonium salt of any of the foregoing; and shutting in treatment zone for at least a sufficient time to allow the treatment fluid to in-situ form a solid gel at a design temperature for the method. Alternatively, a first treatment fluid including the aqueous silica sol and a second treatment fluid including the chemical activator can be introduced into the treatment zone separately, in any order.

The invention provides a method for preparing high base number (TBN400) synthetic calcium alkyl-benzene sulfonate. The method comprises the following steps of: adopting a mixed acid of long-chain linear alkyl-benzene sulfonic acid and high-boiling heavy alkyl-benzene sulfonic acid, calcium oxide and / or calcium hydroxide, low-carbon alcohol, alkaline-earth metal halide or nitrate, and a mixture of alkaline-earth metal alkylphenol or alkaline-earth metal alkylphenate and polyisobutylene succinic anhydride for a neutralization reaction in the presence of a solvent and cutback oil at a temperature of between 40 and 80 DEG C; then, passing through carbon dioxide to a product of the neutralization reaction at a temperature of between 40 and 60 DEG C for a carbonation reaction; and producing high base synthetic alkyl-benzene sulfonate with a total base number (TBN) of 400mgKOH / g by adopting a process of a one-step method. The product is divided into high-base number (TBN400) synthetic alkyl-benzene sulfonate containing chlorine and high-base number (TBN400) synthetic alkyl-benzene sulfonate without the chlorine. The product produced by adopting the method with low viscosity, small turbidity, easy filtration, light color and no skin formation has the advantages of excellent high-temperature detergency, excellent anti-foaming property and excellent heat storage stability.

A process for preparing butanediol polysuccinate able to be fully biodegradated includes such steps as adding butanediol and butanedioic acid to reactor, esterifying reacting at 150-200 deg.C, and vacuum polycondensating at 200-280 deg.C under the existance of catalyst. It is a thermoplastic resin with 100,000 of mass average molecular weight and better mechanical performance.

The invention provides a catalyst for continuously producing butanedioic anhydride by maleic anhydride hydrogenation. The catalyst is a nickel loaded catalyst prepared by an equivalent-volume impregnation method, wherein in the catalyst, the content of nickel is 13 to 20 weight percent, the content of accelerating agent is 1 to 7 weight percent, and a carrier is a composite oxide of SiO2 and Al2O3 or SiO2-Al2O3. A preparation method for the catalyst comprises the following steps: impregnating impregnation solution blended by ammonia water and active metal salt solution on a carrier subjected to baking pretreatment at a temperature between 400 and 800 DEG C by the equivalent-volume impregnation method to form the catalyst through drying, baking and reducing treatment. The catalyst is applied to continuously preparing the butanedioic anhydride by maleic anhydride hydrogenation on a fixed bed reactor, the conversion rate of maleic anhydride is more than or equal to 99.98 percent, and the selectivity of the butanedioic anhydride is more than or equal to 98.85 percent. The catalyst achieves the technical-scale continuous production of the butanedioic anhydride, and has the advantages of high activity, good selectivity, high yield (more than or equal to 98.83 percent) and long service life.

Oral care compositions having improved taste, said compositions comprising: a carrier material; from about 0.001 to about 10%, by weight of the composition, of an oral care component selected from metal salts, antimicrobial agents, bad breath reduction agents, bleaching agents, surfactants, or a combination thereof; and from about 0.0001 to about 1%, by weight of the composition, of a TRPA1 agonist selected from vanillin esters; benzoate esters; hydroxybenzoate derivatives; methoxy benzoate derivatives; hydroxybutanedioate derivatives; benzamidobenzoate derivatives; methylpropanoate derivatives; phenyl acetate derivatives; hex-3-enoate derivatives; 2-(furan-2-ylmethylsulfanyl)-3-methylpyrazine; phenylmethoxymethylbenzene; (2R)-2-azaniumyl-3-[(2R)-2-azaniumyl-3-oxido-3-oxopropyl]disulfanylpropanoate; (3E)-2-hydroxy-4,8-dimethylnona-3,7-dienal; (2R)-2-azaniumyl-3-[(2S)-2-azaniumyl-3-oxido-3-oxopropyl]disulfanylpropanoate; (3Z)-3-butylidene-2-benzofuran-1-one; 3-methyl-N-(3-methylbutyl)butan-1-imine; 2-(furan-2-ylmethyldisulfanylmethyl)furan; and combinations thereof. Uses thereof and methods of improving the taste of an oral care composition.

The invention belongs to the technical field of biological engineering and discloses a novel succinic acid purification process through anaerobic fermentation. By adopting the separation process based on solid-liquid separation, ultrafiltration, decoloration, acidification and crystallization and by introducing ammonium sulfate thermal cracking technology, the invention realizes cyclic utilization of the acid and the alkali, forms a closed clean production flow and effectively ensures the quality of the succinic acid used for food and medicine. The invention not only reduces the fermentation cost and improves the economic benefits but also reduces environment pollution, improves the ecological environment and promotes the sustainable development of the national economy. Therefore, the invention has wide social benefits.

The invention relates to magnetic silicon dioxide microspheres with a nuclear shell and surface anisotropic double functional groups and a preparation method thereof. The preparation method comprises the following steps of: preparing superparamagetic microspheres by a solvothermal process; preparing magnetic microspheres which are coated by silicon dioxide by a sol-gel process; preparing the magnetic silicon dioxide microspheres of which the surface has amino group by taking the magnetic silicon dioxide microspheres as seeds and by the copolycondensation of alkyl ester orthosilicate and a silane coupling agent, and drying the magnetic silicon dioxide microspheres to obtain samples; and by a PICKERING emulsion technology, stabilizing a paraffin / aqueous emulsion system with a micrometer scale by using the aminated magnetic microspheres to form single-layer close packing of the magnetic microspheres on the surface of paraffin spheres, then reacting the amino group on the surface of the magnetic microspheres which is exposed in a liquid phase with succinic anhydride to introduce carboxyl into the partial surface of the microspheres, so that the surfaces of the magnetic microspheres have the anisotropic double functional groups. The obtained magnetic microspheres with the double functional groups have the advantages that: magnetic responsiveness is high; grain size can be controlled between 200 and 800 namometers; and the density of the surface functional groups can be adjusted.

A method for extracting succinic acid from fermentation broth through cation resin exchange belongs to the biochemical technical field. The method comprises the following steps that fermentation broth undergoes heated centrifugal filtration or membrane filtration so as to eliminate thalli; sodium carbonate is added in the clear solution to generate magnesium carbonate precipitation; a filter cake is reclaimed after filtration; then, the filtrate flows through a cation resin column, and the effluent is succinic acid solution; a succinic acid product is obtained after decoloring, concentration and crystallization; the cation resin column is eluted by ammonium carbonate after exchange so as to obtain sodium bicarbonate effluent; sodium salt is reclaimed and reused in fermentation broth treatment after ammonia is eliminated by heating; furthermore, resin regeneration can be realized by sulphuric acid through a conventional method, and the generated (NH4)2 SO4 can be used as a fertilizer. The method does not need to carry out acidification for the filtrate, and has the advantages of short technological line and high yield, thereby realizing element cycle economy. The invention provides a method for extracting succinic acid from microorganism fermentation broth with simple operation and economical efficiency.

This invention relates to a method for producing succinic acid type culture by animalcule fermentation, especially relating to an animalcule actinobacillus succinogenes SW0580 generating succinic acid by a fermentated sugariness raw material, its preservation number: CGMCC No. 1593 and a method for utilizing said animalcule fermentation to produce succinic acid, in which, said animalcule is the actinobacillus succinogenes separated from the rumen tested and 10-50g / L succinic acid can be produced by anaerobic fermentating 20-100g / L sugariness raw materials.

The invention discloses scaling powder for no-clean lead-free low-silver welding paste. The scaling powder comprises, by weight percentage, 3-13% of active agent, 0.2-1.5% of surface active agent, 0.2-3.0% of emulgator, 3.0-10.0% of thixotropic agent, 3-8% of film-forming agent, 0.1-1% of antioxidant, 0.1-0.5% of corrosion inhibitor and the rest of solvent. The active agent is composed of four or five components in succinic acid, oxalic acid, salicylic acid, glutaric acid, citric acid, adipic acid, lactic acid, benzoic acid, malic acid and triethanolamine. The scaling powder for the no-clean lead-free low silver welding paste does not contain halogen, the corrosion to a circuit board is greatly lowered, the printing quality of the welding paste is good without bridging or turned-down edges, a welding point is good in forming after returning, the brazing connecting defect is greatly lowered, the residue is small without solder balls, the cleaning is not needed, the welding paste is directly used for assembling, the Sn-0.45 Ag-0.68 Cu or Sn-0.3 Ag-0.7 Cu low silver welding paste manufactured by using the scaling powder does not contain the halogen and rosin, the organic chemistry smoke is small, and the pollution to the environment is small.

A biodegradable copolyester (butanediester polysuccinate for example) is prepared from butanedioic acid, butanediol, copolydiol and copolydiacid through copolymerizing to obtain atactic linear copolyester, and condensation.

The invention discloses vehicle high-methanol content gasoline, relates to carbon-containing fuels and solves the problems of difficult low-temperature startup, serious metal corrosion, inadequate power and susceptibility to generating precipitates of the conventional methanol gasoline. The vehicle high-methanol content gasoline comprises the following components in part by volume: 70 to 86 partsof methanol, 14 to 30 parts of gasoline component oil, 0.5 to 1 part of cosolvent, 0.1 to 0.2 part of antiseptic and rubber swelling inhibitor, 0.2 to 0.3 part of detergent and 0.01 to 0.05 part of coloring agent. The cosolvent consists of isobutanol, isopropyl ether, 2-isobutanol and tetrahydrofuran, the antiseptic and rubber swelling inhibitor consists of propargyl alcohol, butanedioic acid, hexakis(dihydrogen phosphate), N-methyl morpholine, cyclohexane and dimethyl phthalate, the detergent consists of normal propyl alcohol, isopropanol, limonene and cyclohexane, and the coloring agent is Sudan IV solution. The vehicle high-methanol content gasoline has high startability, high dynamic performance, high environmental protection performance, obvious anticorrosion effect and high safety.

The invention relates to a 1E-level K1-type halogen-free flame-retardant heat-shrinkable pipe for a nuclear power plant, comprising the following components in parts by weight: 100 parts of vinyl polymer, 5-15 parts of microcapsule red phosphorus, 20-60 parts of aluminium hydroxide, 0.5-3 parts of light stabilizer, 0.5-2 parts of ultraviolet absorber, 4-12 parts of antioxidant and 2-5 parts of lubricant, wherein the light stabilizer is polysuccinic acid (4-hydroxyl-2, 2, 6, 6-tetramethyl-1-pyridine) ester; the ultraviolet absorber is 2-(2'-hydroxyl-3', 5'-ditrimethylacetic phenyl) benzotriazole; and the antioxidant is formed by mixing tetra(beta-(3, 5-ditertbutyl-4-hydroxyl phenyl) propionic acid) tetranhaptanoate and 4, 4'-thioic di(6-tertiary butyl-3-methylphenol) according to the proportion of 1:1. The 1E-level K1-type halogen-free flame-retardant heat-shrinkable pipe for the nuclear power plant does not contain halogen, is good in flame retardance, can pass the VW-1 burning test and can be used for 60 years under the temperature condition of 90 DEG C.

This invention relates to the biocatalysts for the efficient production of succinic acid and / or other products from renewable biological feedstocks. The biocatalysts have a very high efficiency for the growth-coupled production of succinic acid and / or other products from carbohydrate feed stocks as a result of both genetic manipulations and metabolic evolution. More specifically, certain biocatalysts of the present invention produce succinic acid at high titers and yield in mineral salts media during simple pH-controlled, batch fermentation without the addition of any exogenous genetic material. The genetic manipulations of the present invention are concerned with the energy-conserving strategies coupled with the elimination of alternative routes for NADH oxidation other than the routes for succinic acid production. The biocatalysts contain glucose-repressed gluconeogenic phosphoenol pyruvate carboxykinase (pck) depressed by genetic modifications and a genetically-inactivated phosphotransferase system. In terms of succinic acid production efficiency, the biocatalysts of the present invention are functionally equivalent to succinate producing rumen bacteria such as Actinobacillus succinogens and Mannheimia succiniproducens with one difference that the biocatalysts are able to achieve this high level of succinic acid production in a minimal salt medium with carbohydrate source as opposed to the requirement for a rich media for succinic acid production by rumen bacteria.

The invention discloses an analytical detection method of a water bactericide based on a MOFs / TiO2 magnetic composite material. the method comprises the following steps: dispersing magnetic Fe3O4 (at) SiO2 nanospheres into an N,N-dimethylformamide solution of 3-aminopropyltriethoxysilane and succinic anhydride so as to make the surface to carry carboxyl; dispersing the carboxyl-modified Fe3O4 (at) SiO2 nanospheres into a methanol solution of zinc nitrate and 2-methylimidazole to coat the surface with a metal-organic framework material ZIP-8 so as to obtain Fe3O4 (at) SiO2(at) ZIF-8 nanoparticles; and dispersing the Fe3O4 (at) SiO2(at) ZIF-8 nanoparticles into an ethanol solution of tetrabutyl titanate so as to prepare a magnetic nanocomposite material. By the use of the material, the enrichment and separation process becomes simple. By combining advantages of MOFs and TiO2, enrichment efficiency of a bactericide can be raised. The material of the invention can be used in enrichment and separation of a bactericide and liquid chromatography tandem mass spectrometry detection.

The invention provides a polylactic acid composition and a polylactic acid product. The polylactic acid composition comprises the following components by weight percent: 50 to 80 percent of polylactic acid, 0 to 35 percent of adipic acid-polybutylene terephthalate, 0 to 35 percent of poly(butylene succinate), 0.05 to 0.5 percent of peroxide, 0.05 to 0.5 percent of chain extendor and 3 to 15 percent of plasticizer, wherein the content of the adipic acid-polybutylene terephthalate and the content of the poly(butylene succinate) are not 0 percent. The mechanical properties such as melt strength, elongation at break, tenacity and anti-tear strength of the polylactic acid composition provided by the invention are improved, so that the polylactic acid composition with better comprehensive mechanical properties can be obtained, and the polylactic acid composition has more stable processability and better film forming stability.

The invention provides a preparation method of nanocluster mimic enzyme with visible-light activity and a use of the nanocluster mimic enzyme in colourimetry detection of trypsin. Gold / silver nanoclusters modified by bovine serum albumin and mercaptosuccinic acid as surface modification agents has peroxidase-like catalytic characteristics under visible light irradiation and can catalyze chromogenic substrate oxidation. Compared with the peroxidase, the nanocluster mimic enzyme with visible-light activity is free of a high-concentration oxidizing agent and has high catalytic activity, good stability and eco-friendly catalytic conditions. Trypsin decomposes a protein template on the surface of the nanocluster so that the nanocluster surface state is changed and causes aggregation thereby reducing catalytic activity. The preparation method has a trypsin detection linear range of 9.0*10<-7> to 1.0*10<-3>g / mL and has a detection limit of 0.6 micrograms per milliliter far lower than trypsin content of urine and blood of patients.

The invention belongs to the technical field of tobacco flavors, and particularly relates to a product of the Maillard reaction of a date extract and the application thereof in tobacco. The date extract is mixed with amino acid and a reaction solvent, the pH value of the reaction system is adjusted to be 7-10, ammonium dihydrogen phosphate, ascorbic acid or butanedioic acid is adopted as catalyst, the mixture is heated to 80 to120 DEG C within 20-30min, and then continuously reacts for 0.5-4h, so as to obtain the reaction product finally after being cooled. The invention utilizes abundant date resources, and not only develops a new utilization method for the date resources, but also generates a tobacco flavouring agent through the reaction of the date extract and the amino acid. The invention is applied to tobacco flavoring, thereby decorating the fullness of smoke while highlighting the style of Chinese style cigarette, and reducing the harmfulness of cigarette.

The invention relates to a novel amphiphilic-block-copolymer-based pro-camptothecin drug, which is a compound of methoxy polyethylene glycol- polylactic acid and camptothecin derivatives (mPEG-X-PLA-T), wherein, mPEG refers to methoxy polyethylene glycol; X refers to linking group, for example, succinic acid; PLA refers to polylatic acid; T refers to drug molecule, that is, camptothecin derivatives such as, camptothecin, 10-hydroxycamptothecine, 7-ethyl-10- hydroxycamptothecine. Polylactic acid is connected with camptothecin derivatives through ester bond.

The invention relates to an emulsified metal antirusting agent and a preparation method thereof. The antirusting agent comprises the components by weight percentage of 2-2.5% of dicarboxylic acid, 6-6.5% of triethanolamine, 1-1.5% of monoethanolamine, 5-6.5% of synthesized borate, 8-10% of dodecenylbutadioic acid, 4.5-6% of octadecane oeoyl sarcosine acid, 0.1% of benzotriazole and 66.9-73.4% of water. The preparation method comprises the following steps of: firstly preparing a water-base antirusting agent; subsequently adding the octadecane oeoyl sarcosine acid, the synthesized borate and thedodecenylbutadioic acid in a reaction kettle; and mixing the solution, thus obtaining the emulsified antirust product. The method utilizes the strong adsorption function between the antirusting agentand the metal, displaces the residual oil dirt out of the surface of the metal, leads the surface of the metal to be adsorbed by a hydrophobic protective film; no oil dirt is remained on the surfaceof the metal that is processed by the antirusting agent, and the surface of the metal is not easy to be polluted by the dust; the antirusting agent can be used directly; furthermore, the components contains no nitrite, thus being safe and environment-friendly for use.

The invention discloses a strain capable of producing succinic acid, a method for producing the succinic acid and an application thereof. The strain is named as Escherichichia coil BER208 with the collection number of CCTCCNO: M2012351. The strain grows quickly with glucose serving as the single carbon source in a fermentation medium under the anaerobic condition and is capable of highly producing the succinic acid. The optical density (OD) 6000 reaches 6.87 and the yield of the succinic acid reaches 10.5g / L after fermentation for 48 hours, and compared with an original strain, the yield of the succinic acid is improved by more than two times.

The catalyst has active component Ni and carrier SiO2 and Al2O3 in the molar ratio of 1 to 1.47-5.98 to 0-3.3. The catalyst is prepared with Ni(NO3)2, ethyl metasilicate with or without aluminum nitrate and ethanol, and through pH regulation to 3-5 or 7-9 with acetic acid, ammonia water or urea, heating at 80-120 deg.c to form gel, roasting at 400-550 deg.c and reduction at 400-580 deg.c. One technological process of catalytically hydrogenating cis-butenedioic anhydride to prepare butasnedioic anhydride in the state with or without solvent is provided. The catalyst has the features of highspecific surface area, high dispersion of metal in carrier, high heat stability, high catalytic activity, high selectivity, capacity of being reused, easy separation from the product, low cost, low consumption and mild reaction condition.

This invention is directed to a new low molecular weight branched alkenyl succinic acid derivative that may be prepared by reacting a low molecular weight polyisobutene (PIB) having from about 8 to about 32 carbon atoms, and wherein at least about 50% of the olefinic bonds of the polyisobutene comprises methylvinylidene isomer plus tri-substituted isomer, with an unsaturated acidic reagent and method of making same, resulting in alkenyl succinic acid derivative isomers; and a low molecular weight branched alkenyl succinimide and method of making same.

The invention relates to a preparation and quality control method of Mitiglinide Calcium comprising steps: 1,synthesis of cis- cyclohexyl-1,2-dimethylacid imide; 2,synthesis of cis-hexa-hydrogen isoindole; 3,synthesis of alpha-benzyldiethyl malonate; 4,synthesis of benzylsuccinic acid; 5,S- benzylsuccinic acid methylbenzylamine salt; 6,synthesis of s- benzylsuccinic acid; 7,synthesis of (2S)-2- benzyl-3-(cis-hexa-hydrogen isoindole-2- carbonyl) propanoic acid; 8,synthesis of Mitiglinide Calcium; 9,purity of Mitiglinide Calcium. This invention also contains the method for quality control of Mitiglinide Calcium comprising steps: watching deseription, messureing specific rotation, authenticating, checking, content messureing for Mitiglinide Calcium.

The invention discloses a method for producing succinic acid. The method comprises the following steps of: performing hydrogenation reaction by taking 5 to 90 weight percent of a maleic anhydride gamma-butyrolactone solution as a raw material at the reaction temperature of between 50 and 100 DEG C under the pressure of between 0.2 and 2 MPa in the presence of a hydrogenation catalyst, hydrolyzing a hydrogenation product, crystallizing and separating to obtain succinic acid. The method is can be operated flexibly; reaction conditions are mild and controllable; and products are easy to separate and have good quality.

A Chelating agent comprising a polymer backbone. The polymer backbone has a plurality of carbon atoms. There are two carboxylate groups or carboxylic acid groups per repeating unit being coupled to separate carbon atoms of the backbone.

The invention provides a biodegradable multilayer co-extrusion material. The material is characterized by comprising two surface functional layers and a middle layer located between the two surface functional layers, components of the surface functional layers and the middle layer include biodegradable materials, and the biodegradable materials refer to one or more of polybutylene succinate, polylactic acid, polyhydroxyalkanoate and polybutylene adipate-polybutylene terephthalate. The invention further discloses a preparation method of the material. The biodegradablity of four selected master batches of the multilayer co-extrusion material is good, and adopted inorganic minerals are natural, so that the co-extrusion material has completely biodegradable properties and can be widely used in various types of food packages, medical products, environmental protection labels, advertisements and all kinds of environmental-protection products.

The invention provides a preparation method for a starch bonding agent, which comprises the following steps of: performing crosslinking treatment on starch by adopting a crosslinker to form modified starch A, performing oxidation with sodium hypochlorite, esterification with butanedioic anhydride and treatment with a cationic etherifying agent on the starch to form modified starch B, and mixing the modified starch A and the modified starch B according to a certain proportion to form the modified starch bonding agent. The preparation method has the advantage of ensuring higher bonding power, firm bonding, high hardness of bonded paper products, high drying speed, low viscosity of paste, high flowability and wettability, convenience of coating, high storage stability and difficulty in gel production.

A demetalating agent for hydrocarbon oil contains one mor mixture of more than two of formic acid, acetic acid, propionic acid and butanoic acid, one or mixture of butanedioic acid and fumaric acid or maleic acid, polyacrylamide, one or mixture of more than two of S-carboxyethyl thiosuccinic acid, 2-mercaptobenzothiazole, hydroxyethylidene biphosphonic acid and 2-hydroxyphosphion acetic acid, andwater.

A high concentration, aqueous liquid surfactant composition is disclosed, comprising at least one amphoteric or anionic surfactant and a liquid-stabilizing amount of at least one liquid-stabilizing agent. The liquid-stabilizing agent is a succinic acid derivative, glutaric acid derivative or a combination thereof. The composition is pourable and pumpable at ambient room temperature.