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765 results about "Mercaptobenzothiazole" patented technology
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2-Mercaptobenzothiazole (MBT) is an organosulfur compound with the formula C₆H₄NSCSH. The molecule consists of a benzene ring fused to a 2-mercaptothiazole ring. It is used in the sulfur vulcanization of rubber.
Use of a metallic mercaptothiazole or metallic mercaptobenzothiazole in golf ball compositions
The present invention is directed to a golf ball having at least one of a center, cover, or intermediate layer that includes a reaction product that includes a resilient polymer component, a free radical source, at one of a metallic mercaptothiazole and optionally one or more of a cis-to-trans catalyst, a crosslinking agent, or a filler.
Owner:ACUSHNET CO
Engine antifreezing solution
ActiveCN101691484AAvoid the disadvantages of instabilityWith boiling suppressionHeat-exchange elementsCooperative interactionSebacic acid
The invention relates to an engine antifreezing solution which is prepared by mixing the following components to react: glycol, sodium molybdate, sodium hydroxide, isooctanoic acid, sebacic acid, sodium benzoate, benzotriazole, sodium 2-mercaptobenzothiazole, dye and deionized water. The invention adopts a new formula which uses organic matter as main component and inorganic matter as auxiliary component to reach the aim of controlled release on the basis of conventional inorganic and all-organic engine antifreezing solution technologies, wherein the organic acid uses the combination of monoacid and binary acid. The invention does not contain sodium borate and silicate so as to avoid the defect that precipitate is easy to generate due to the existence of sodium borate and silicate in glycol series antifreezing solution and the antifreezing solution is unstable; and the engine antifreezing solution of the invention does not contain amine, nitrate, phosphate and other substances which are harmful to the environment and human body. The researched antifreezing solution has good performances of stability, freeze-proofing, boil-proofing, corrosion-proofing and scale prevention through the cooperative interaction of components so as to perform multi-level anticorrosion protection for the cooling system of the vehicle.
Owner:SHAANXI DADI IND CO LTD OF CHINA NAT NUCLEAR
Environment-friendly rubber plastic heat-insulating material and its preparation method
The invention relates to an environment-friendly rubber plastic heat-insulating material and its preparation method, and the rubber plastic heat-insulating material is prepared from butyronitrile rubber (NBR), antimonous oxide (Sb2O3), zinc oxide, sulfur, dioctyl-phthalate (DOP), epoxidized soybean oil (ADDA), mercaptobenzothiazole (M), anti-aging agent (4020), antioxidant (AST-500), protective wax (HGB-3), ethylene-vinyl acetate copolymer (EVA), dicumyl peroxide (DCP crosslinking agent), polyethylene glycol (PEG), stearic acid, aluminum hydroxide, foaming agent-dinitrosopentamethylene tetraamine (H), diphenylguanidine (D), pigment, anti-aging agent (RD), anti scorching agent (PVI), and the like. By limited use of raw materials containing chlorine ion components and cooperation of a new vulcanization foaming technology, environment-friendly and heat-insulating performances of the product can be stabilized, the prepared environment-friendly rubber plastic heat-insulating material has no corrosion performance in use, the material life is prolonged, metal pipes in refrigeration equipment can be effectively protected, and maximized performance of the product can be performed.
Owner:周良文
Method for preparing 2-mercaptobenzothiazole
The invention discloses a method for preparing 2-mercaptobenzothiazole, which comprises the steps of: adding carbon disulfide, aniline and sulfur into a reaction kettle; and heating the mixture, finishing a reaction under the reaction pressure of 6.8 to 9.5MPa to obtain a crude product, namely a melt, pressing the melt into a crystallizer loaded with carbon disulfide, controlling the initial temperature of the crystallization, reducing the temperature, beginning to discharge hydrogen sulfide when the material temperature in the crystallizer is reduced to be between 70 and 100 DEG C, controlling the discharge time of hydrogen sulfide to be between 20 and 60min, cooling the obtained product to be between 15 and 20 DEG C, filtering the obtained product to obtain a filter cake and carbon disulfide mother liquor, washing the filter cake for 2 to 5 times by using carbon disulfide in an amount which is 1 to 3 times mass of the filter cake, and drying the scrubbed filter cake to obtain the 2-mercaptobenzothiazole at the mass percentage concentration of over 98 percent. By the method, no 'waste water' and 'waste gas' are discharged, and asphalt-like wastes are greatly reduced. The circulation of crystallization mother liquor realizes the recycling of intermediate products, and the total yield of the process is improved to be over 94 percent.
Owner:TIANJIN UNIV +1
Preparation of rubber vulcanization accelerator dibenzothiazyl disulfide
ActiveCN101463018AReduce displacementReduce the burden onOrganic chemistryDIBENZOTHIAZYL DISULFIDEMercaptobenzothiazole
The invention relates to a preparation method of a thiofide (dibenzothiazyl disulfide), wherein, 2-mercaptobenzothiazole sodium salt is taken as a raw material, mixture of hydrogen peroxide and sulfuric acid is taken as an oxidizing agent, and the mol ratio of the hydrogen peroxide to the sulfuric acid is 0.5-2.5:1, and the method comprises the following steps (1) preparation process of the oxidizing agent: evenly mixing the hydrogen peroxide and the sulfuric acid in a container according to the mol ratio; and (2) oxidization process of the product: dropwise adding the mixture of the hydrogen peroxide and the sulfuric acid to a reaction kettle with the 2-mercaptobenzothiazole sodium salt at the temperature of 55 DEG C-65 DEG C while stirring for oxidization reaction for 60-80 minutes, keeping warm for about 0.5 hour after the oxidizing agent is added dropwise; then measuring pH value of the reaction solution, performing solid-liquid separation at the temperature of 30 DEG C when the pH value is stabilized within a range of 6.5-7.5, drying, crushing, screening and packaging the obtained solid to obtain the product. The method can help effectively enhance quality of the product, save energy and lower consumption and reduce 'three wastes' pollution.
Owner:WILLING NEW MATERIALS TECH CO LTD
Process for preparing cefixime
The invention provides a method for preparing cefixime, which belongs to the medicine synthesis technical field and comprises the steps of preparation of 7-AVCA, preparation of cefixime methyl ester, preparation of the cefixime and so on. The method aims at the prior amino de-protection to make an improvement, and uses penicillin acylase to substitute trifluoroacetic acid and so on in the prior process to ensure that an amino de-protection reaction is greatly improved, the use of organic solvents can be completely avoided, and acylase can also be reused at the same time. Methylene dichloride and tetrahydrofuran solvents in the prior process are substituted by adopting alcohol, ketone or ester solvents, so that an amidation reaction is greatly improved, which ensures that reaction solvents are easy to recover and reuse, can reduce production cost, reduce the discharge of waste liquid, reduce the pollution to the environment, can completely recover a byproduct, namely mercaptobenzothiazole produced by the reaction, improve the atom utilization rate of reaction raw-materials, and greatly improve the hydrolyzation and crystallization of subsequent products and the quality of a finished product.
Owner:ZHEJIANG ANGLIKANG PHARMA
Aluminum alloy corrosion inhibitor
The invention belongs to the technical field of corrosion prevention of aluminum alloy. An aluminum alloy corrosion inhibitor is characterized in that: one gram of the aluminum alloy corrosion inhibitor consists of 0.05 to 0.10 microgram of potassium nitrite, 1.0 to 4.0 micrograms of calcium gluconate, 0.05 to 0.2 microgram of mercaptobenzothiazole, 0.05 to 0.2 microgram of borate and 0.05 to 0.10 microgram of hexadecane amine. The aluminum alloy corrosion inhibitor formed according to the ratio is economic, effective, low in toxicity and high in applicability, protects the original process flow from being damaged, and is the saline medium aluminum alloy corrosion inhibitor without additional equipment.
Owner:WUJIANG SHI FINE WORKMANSHIP & ALUMINUM WORD MANUFACTORY
Flatting agent for epoxy-polyester powder paint and preparation method thereof
InactiveCN102268203AAddress mechanical propertiesSolve technical problems that are prone to yellowingPowdery paintsEpoxy resin coatingsEpoxyPolyester
The invention relates to a compound, and in particular relates to a flatting agent for epoxy-polyester powder paint and a preparation method thereof. The flatting agent for the paint is prepared by blending a catalyst with a synthetic carboxyl acrylic resin or synthetic epoxy acrylic resin. The flatting agent is characterized in that based on a 2-mercaptobenzothiazole zinc salt as the catalyst and the synthetic carboxyl acrylic resin or synthetic epoxy acrylic resin as a reactant, the catalyst and the reactant are mixed so as to prepare the flatting agent, wherein the reactant of the synthetic carboxyl acrylic resin comprises a monomer containing a carboxyl group, and the acidic value of the synthetic carboxyl acrylic resin is 100-600KOHg / mg; and the reactant monomer of the synthetic epoxy acrylic resin comprises a monomer containing an epoxy group, and the epoxy equivalent of the synthetic epoxy acrylic resin is 100-600g / eq. The preparation method provided by the invention is practicable; and by using the preparation method in the invention, the obtained flatting agent has good flatting stability and mechanical property, thereby solving the technical problems that the traditional flatting agent is poor in mechanical property and is easy to turn yellow.
Owner:NINGBO SOUTH SEA CHEM
Elastomeric Copolymers, Copolymer Compositions, and Their Use in Articles
A copolymer is formed from an isoolefin having from 4 to 7 carbon atoms and an alkylstyrene. The copolymer has a substantially homogeneous compositional distribution. The copolymer has from about 8 to about 12 wt % of alkylstyrene and at least 85 wt % of isoolefin. The copolymer is preferably halogenated with about 1.1 to about 1.5 wt % of a halogen. The copolymer may in elastomeric nanocomposites. To obtain a good dispersion of the nanoclay in a formulated compound, at least one cure accelerator is selected from the group consisting of mercaptobenzothiazole disulfide, mercaptobenzothiazole, cyclohexyl benzothiazole disulfide, dibutyl thiourea, tetramethylthiuram disulfide, 4-4-dithiodimropholine, zinc dimethyldithiocarbamate, and zinc dibutylphosphorodithiate.
Owner:RODGERS MICHAEL BRENDAN +4
Anticorrosive sealing liquid and method for sealing anodic oxide film containing copper-aluminium alloy by utilizing same
InactiveCN101792922AImprove corrosion resistanceSmall currentSurface reaction electrolytic coating8-HydroxyquinolineAdipate
The invention discloses anticorrosive sealing liquid and a method for sealing an anodic oxide film containing a copper-aluminium alloy by utilizing the same. The anticorrosive sealing liquid is prepared by dissolving 5-15g of adipate and 10-100mu g of anticorrosive in 100ml of deionized water. The anticorrosive is 2-mercaptobenzothiazole, benzotriazole, salicylaldoxime, 8-hydroxyquinoline or quinaldic acid. The sealing method is characterized by sealing the anodized copper-aluminium alloy in the electric field. By the sealing method, not only the micropores of the anodic oxide film are sealed, but also the anticorrosive is adsorbed in the anodic oxide film in the applied electric field, when the anodic oxide film is corroded, the anticorrosive is released from the micropores of the anodic oxide film through capillarity to play a role of corrosion inhibition to the copper-bearing phases in the base materials containing the copper-aluminium alloys to prevent further corrosion.
Owner:BEIHANG UNIV
Corrosion inhibiting and descaling agent of industrial cooling circulating water system
InactiveCN1754840APlay a role in corrosion inhibitionPlay the effect of anti-scalingTreatment using complexing/solubilising chemicalsChemical industryMercaptobenzothiazole
The present pertains to the field of chemical industry, wherein an antisludging agent for industrial circulating water systems is disclosed, which comprises acroleic acid-acrylate-petroleum sulfonate copolymer, mercaptobenzothiazole, sodium humate, lignin and water. The antisludging agent has good protection action to industrial cooling-water systems.
Owner:SHANGHAI WANSEN WATER TREATMENT CO LTD
Purification process for vulcanization accelerator 2-mercaptobenzothiazole
The invention relates to a purification process for vulcanization accelerator 2-mercaptobenzothiazole, which includes that crude 2-mercaptobenzothiazole molten pulp prepared through high-temperature high-pressure condensation is directly led into an extraction kettle filled with organic solvents after complete replacement with nitrogen in advance; impurities are removed by conducting liquid-liquid extraction reaction; the temperature of the extraction kettle is kept no more than 50 DEG C in the process of extraction; mass ratio of the organic solvents to the crude 2-mercaptobenzothiazole molten pulp is (2-10) : 1; after extraction is finished, mixture inside the extraction kettle is filtered; obtained filter cakes are dried so as to obtain the vulcanization accelerator 2-mercaptobenzothiazole; the organic solvents recycled by distilling obtained filter liquor can be reused; and organic solvents evaporated in the extraction process condensate and flow back, and non-condensable gas is recycled by using active carbon to absorb the non-condensable gas. The purification process has safe extraction, shortens process flow, saves labor, material resources and energy sources, and can obtain high-purity vulcanization accelerator 2-mercaptobenzothiazole.
Owner:山东戴瑞克新材料有限公司
Demetallization agent for hy drocarbon oil and its operation method
InactiveCN1431277ASuitable for decalcificationLow costRefining with acid-containing liquidsPropanoic acidButanedioic acid
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.
Owner:CHINA PETROLEUM & CHEM CORP +1
Collecting agent and preparation method and application thereof
The invention discloses a collecting agent preparation and application method. The collecting agent is prepared from modified dithiocarbamic acid, sodium mercaptobenzothiazole, lauryl mercaptan and fatty alcohol. A molecular formula of the sodium mercaptobenzothiazole is shown as a formula I, a molecular formula of the modified dithiocarbamic acid is shown as a formula II, and a molecular formula of the lauryl mercaptan is shown as a formula III, wherein R1 refers to straight-chain alkyl groups with 1-4 carbon chains, and R2 refers to straight-chain alkyl groups with 2-4 carbon chains. The preparation method includes that the modified dithiocarbamic acid, the sodium mercaptobenzothiazole, the lauryl mercaptan and the fatty alcohol are mixed proportionally and mechanically stirred for 10-30min at the temperature of 15-35 DEG C to obtain reddish brown oily liquid which is the collecting agent. The collecting agent is applicable to associated precious metal sulfide flotation. Recovery rate of useful metals in associated precious metal sulfide ores can be increased by giving full play to synergistic effects of different collecting agents.
Owner:KUNMING METALLURGY INST
Preparation method and application of 2-mercaptobenzothiazole modified activated carbon
ActiveCN107215872ASimple processLow modification costOther chemical processesCarbon compoundsActivated carbonOrganic solvent
The invention discloses a preparation method and application of 2-mercaptobenzothiazole modified activated carbon, belonging to the fields of wet metallurgy and precious metal recovery. The preparation method comprises the steps of dissolving 2-mercaptobenzothiazole as an activated carbon modifying agent with an organic solvent or a strong base solution, and preparing 2-mercaptobenzothiazole modified activated carbon by virtue of an impregnation method, wherein the 2-mercaptobenzothiazole modified activated carbon is used for adsorbing Au(S2O3)2<3->. According to the preparation method, the disadvantages that cyanogen is polluted during adsorption recovery of activated carbon supported copper cyanide complex ions (Cu(CN)4<2->), a modifying process of loaded prussian blue is complicated, and continuous adsorption is difficultly realized, and the like are solved; the modified activated carbon is capable of adsorbing gold in thiosulfate gold leaching and has the advantages of multistage adsorption capacity and the like.
Owner:KUNMING UNIV OF SCI & TECH
Fine purification method for rubber vulcanization accelerant 2-mercaptobenzothiazole (M)
The invention relates to a method for refining a thiofide 2-mercaptobenzothiazole (M). The method is characterized in that an extraction method and an alkali dissolving and acid isolation method are creatively combined. The method comprises the following steps: crude thiofide M is extracted by using toluene for three times to remove resin impurities so as to obtain high-purity thiofide M; the thiofide M in the resin is purified by the alkali dissolving and acid isolation method; and the thiofideoluene is reclaimed by a distillation method. By adopting the processing, the thiofide M with high purity, high melting point and short melting period can be obtained.
Owner:山东戴瑞克新材料有限公司
Method for preparing sulfenamide thiofide by catalyzing oxidization of molecular oxygen in water phase
ActiveCN106866577AHigh catalytic activityImprove reaction efficiencyOrganic chemistryChemical recyclingPhthalocyanineBy-product
The invention relates to a method for preparing sulfenamide thiofide by catalyzing oxidation of molecular oxygen in a water phase. According to the method, a water-soluble transition metal phthalocyanine compound is utilized as a catalyst, and 2-mercaptobenzothiazole generates oxidation cross coupling reaction with amine (tert-butylamine or cyclohexane) for 1 to 30 hours to generate sulfenamide thiofide in the water phase under the conditions that oxygen (or air) pressure is 0,01 to 1MPa, and temperature is 40 to 100 DEG C. Reaction of the preparation method disclosed by the invention is performed in the water phase, other organic solvents are prevented from being added, catalyst activity is high, reaction efficiency is high, the catalyst can be used repeatedly, a synthesizing technology is concise, product selectivity is high, by products are few, waste is little, environmental friendliness is achieved, and the preparation method has stronger industrial application prospect.
Owner:WILLING NEW MATERIALS TECH CO LTD
Improved method for synthesizing 2-mercaptobenzothiazole derivative
The invention discloses an improved method for synthesizing a 2-mercaptobenzothiazole derivative. The method comprises the following steps of: putting relatively simple raw materials consisting of a phenylamine derivative, carbon disulfide and sulphur in a reaction kettle; introducing N2 till the reaction pressure is kept in a range of 6-15 MPa; raising the temperature to 200-260 DEG C; reacting for 2-5 h; dissolving the product by using alkali; filtering and removing side-effect impurities; and acidizing and separating the product, the content of which is above 99%. The reaction yield can be increased to 90-100% by optimizing a reaction condition. The method disclosed by the invention has the advantages that: the cost of reaction raw materials is saved; the reaction time is shortened; furthermore, the reaction purity and the yield are increased; and the method can be popularized for large-scale industrial production.
Owner:NANKAI UNIV
Mercaptobenzothiazoles anti-corrosion ionic liquid as well as preparation method and application thereof
The invention discloses mercaptobenzothiazoles anti-corrosion ionic liquid. The name of the ionic liquid is [EMIM] [MBT] or [CHO][MBT], and the structural formula of the ionic liquid is described in the description. The invention also discloses a preparation method of the ionic liquid, and application of the ionic liquid in a lubricant composition. The mercaptobenzothiazoles anti-corrosion ionic liquid has excellent corrosion resistance; the lubricant composition containing the ionic liquid has good tribological properties.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Color rubber and plastic heat-insulating material and preparation method thereof
The invention relates to a color rubber and plastic heat-insulating material and a preparation method thereof. The rubber and plastic heat-insulating material is prepared from polrvinyl chloride paste resin, dinitrosopentamethylene tetraamine, an antiager, styrene rubber, protective wax, an antioxidant, chlorosulfonated polyethylene rubber, diphenyl guanidine, mercaptobenzothiazole, zinc dibutyl dithiocarbamate, zinc diethydithiocarbamate and the like. The performance and the color difference of the product are stabilized by adding a coloring material to perform banburying on the finished rubber again and combining a new vulcanizing foaming technology and a super-long water-cooling system; the prepared color rubber and plastic heat-insulating material does not have fibers and dust, prevents dew formation, has a smooth surface and high cleanliness, has the same bright color as equipment, is environmentally-friendly and non-toxic, reduces secondary construction, saves cost, greatly improves the using performance of the product, prolongs the service life and takes full advantage of the product performance.
Owner:WINCELL INSULATION CO LTD
Use of 2-mercaptobenzothiazole metal salt
ActiveCN103461348AImprove biological activityIncreased drug resistanceBiocidePlant growth regulatorsDiseaseMercaptobenzothiazole
The invention relates to use of a 2-mercaptobenzothiazole metal salt, and especially provides a crop disease prevention and treatment bactericide. The bactericide is characterized in that the bactericide includes the 2-mercaptobenzothiazole metal salt represented by formula (I) and a pesticide carrier; and in the formula (I), M is Zn, Mn, Fe, Sn or Al, and n is 2, 3 or 4. The bactericide has a very high biological activity against most bacteria and an excellent inhibition effect on fungi, and is an ideal drug for comprehensively preventing and treating diseases of crops.
Owner:ZHEJIANG XINNONG CHEM CO LTD +1
Novel rubber packing plate and production technique thereof
InactiveCN101220184AExtended service lifeGood weather resistanceRail fastenersTetramethylthiuram disulfideElastomer
The invention relates to a novel rubber pad, the parts by weight of components of which are: 80-95 portions of ethylene propylene diene monomer rubber, 5-20 portions of elastomer, 0.6-2.5 portions of sulfur, 0.5-2.0 portions of dicumyl peroxide, 0.5-1.5 portions of 2-Mercaptobenzothiazole, 0.8-1.6 portions of tetramethylthiuram disulfide, 2 portions of p-Phenylenediamine or naphthylamine antioxidant, 60-90 portions of carbon black, 15-45 portions of argil, 15-50 portions of calcium carbonate and 35-45 portions of operation oil. Production technique of the pad is according to the processes of mixing - plasticizing - banburying - refining - adding sulfidizer - preparing material - diefilling and sufidizing - finishing - inspecting packages and putting in storage. The invention has the advantages that: the rigidity, the vibration and the noise of railway are reduced; the service life and compression deforming quality of the pad are enhanced; elasticity loss of the pad and line maintenance expense are reduced; the invention also has the advantages of sufficient raw materials, low cost, innocuity and no pollution.
Owner:四川宏亿复合材料工程技术有限公司
Method for opening window on polyimide base material of flexible printed circuit board and its etching fluid
InactiveCN1953643ACheap methodSimple methodConductive material chemical/electrolytical removalConductive pattern polishing/cleaningEtchingEngineering
The invention relates to a method for opening window on the polyimide substrate of flexible printed circuit board. Wherein, it comprises that pretreatment (removing oil, washing and drying), chemical etching pretreatment (plastering film, exposure, and developing), chemical etching, and etching following treatment (washing, removing film, washing and drying). The etching liquid is the mixed solution of caustic potash and caustic soda, while it can be added with azimido-benzene (BTA) and derivate additive 1 or / and mercaptobenzothiazole (MBT) and derivate additive 2, and micro penetrant. The invention has low cost and high accuracy.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
Recycling of Natural and Synthetic Rubber
InactiveUS20100317752A1Efficient recyclingWide applicabilityOther chemical processesPlastic recyclingElastomerThiocarbamate
A delinking composition in the form of a combined solid dose comprising: (i) one or more elastomer delinking accelerators selected from the group consisting of zinc salts of thiocarbamates and zinc salts of dialkyl dithiophosphates; and (ii) one or more elastomer delinking accelerators selected from the group consisting of 2-mercaptobenzothiazole or derivatives thereof, thiurams, guanidines, 4,4′-dithiomorpholine and sulpenamides; and (iii) at least one elastomer delinking activator.
Owner:ELASTOMER TECH
Preparation technologies of tazobactam acid and tazobactam diphenylmethyl ester and application
InactiveCN108164550ALow toxicityImprove stabilityAntibacterial agentsOrganic chemistryEthyl ChlorideMercaptobenzothiazole
The invention relates to preparation technologies of tazobactam acid and tazobactam diphenylmethyl ester and application. A preparation route is as follows: with methylbenzene, 2-mercaptobenzothiazoleand a debrominated product as starting materials, the tazobactam diphenylmethyl ester is prepared after a ring opening reaction, a chlorination reaction, a condensation reaction and a double oxidation reaction, then the tazobactam diphenylmethyl ester is transformed into the tazobactam acid after a deprotection reaction; a preparation method in the scheme is improved on the basis of an iodinationreaction in the prior art, and the chlorination reaction is introduced, so that the reaction quality is optimized, the product purity is improved, and use of toxic, harmful, flammable and explosive substances in the reaction process is reduced, and thus the reaction is more environment-friendly; the product yield can be as high as 98-99.92%, and the preparation cost is also lower than that of thepreparation technology in the prior art.
Owner:常州红太阳药业有限公司
Refrigeration compressor lubricant
ActiveUS20130200295A1Good compatibilityExcellent indexHeat-exchange elementsAdditivesRefrigeration compressorDichlorodifluoromethane
Owner:COPELAND LP
Preparation method of ceftriaxone sodium
InactiveCN102702233ASimple production processReduce manufacturing costOrganic chemistryOrganic basePotassium
The invention discloses a preparation method of ceftriaxone sodium. The method comprises the following steps: with 7-ACA and triazine ring as raw materials, reacting under the catalysis of boron trifluoride acetonitrile, crystallizing to obtain 7-ACT, recovering potassium fluoborate and acetonitrile from the mother solution, dissolving 7-ACT and AE-active ester in a unitary or binary solvent system, reacting under catalysis of an organic base, adding a salifying agent and a water-soluble organic solvent in the water phase to separate out sodium salt and obtain ceftriaxone sodium, and recovering 2-mercaptobenzothiazole from the organic phase. The preparation method of ceftriaxone sodium provided by the invention has simple production process and low production cost, the yields in two steps are both higher than 90 percent, the solvents, organic matters, inorganic salts and the like in the reaction system can be recycled, and no or little waste water is generated.
Owner:苏州盛达药业有限公司
Multi-functional rubber additive and method for preparing same
InactiveCN101445620AImprove mechanical propertiesEasy to processGroup 4/14 element organic compoundsViscous liquidPolymer science
The invention provides a multi-functional rubber additive and a method for preparing same. The multi-functional rubber additive has an abovementioned molecular structural formula; wherein, the left side of the formula is provided with a benzothiazolyl radical; R1 is methylene, ethylidene or propylidene; R2 is cymene or ethyl; R3 is ethylidene, propylidene, methoxy or ethoxy. The preparation method comprises the steps as follows: 2-mercaptobenzothiazole (accelerant M) and alkali are dissolved in organic solvent; subsequently, chlorocarbon silane is added and reacts for 0.5-24 hours at the temperature of 20-120 DEG C under the mixing condition; the reaction products are filtrated, washed, and distilled by pressure-reduction so as to gain viscous liquid-shaped target products finally. The multi-functional rubber additive has multi-functions such as plasticizing, dispersing, promoting, reinforcing, and the like, simple preparation flow, high yield and simple separation process.
Owner:SOUTH CHINA UNIV OF TECH
Anti-freezing fluid for solar water heater and preparation method thereof
The invention discloses an anti-freezing fluid for a solar water heater. The anti-freezing fluid is composed of the following components by weight percent: 36-57 percent of glycol, 0.1-0.4 percent of 1H-Benzotriazole, 01.-0.4 percent of mercaptobenzothiazole, 0.5-2 percent of sodium benzoate, 0.1-0.5 percent of sodium gluconate, 1-2 percent of cinnamic acid, 0.5-2 percent of borax, 0.1-1 percent of sodium phosphate, 0.15-0.25 percent of sodium nitrate, 0.1-0.3 percent of sodium hydroxide, 0.005-0.03 percent of an antifoamer, 0.001-0.006 percent of dye and deionized water in balancing amount. The anti-freezing fluid is good in stability, has the PH rangeability smaller than that of a common anti-freezing fluid at high temperature for a long time, does not separate out particles and flocculent precipitates to block a pipeline, and has good rust inhibition effect on metal material for manufacturing the solar heater. Moreover, the invention further provides a preparation method for the anti-freezing fluid, which is simple and easy to operate.
Owner:RICHU DONGFANG SOLAR ENERGY
2-mercaptobenzothiazole refining method
The invention belongs to the field of organic chemistry refining and discloses a 2-mercaptobenzothiazole refining method. The 2-mercaptobenzothiazole refining method comprises that under action of a composite solvent comprising toluene and isopropanol or comprising toluene and acetone, 2-mercaptobenzothiazole is subjected to recrystallization purification so that a 2-mercaptobenzothiazole refined product is obtained. The 2-mercaptobenzothiazole refining method has the advantages of simple and convenient processes, small organic solvent use amount, small environmental pollution and industrialization easiness.
Owner:QINGDAO UNIV OF SCI & TECH
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