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133 results about "Methane sulfonate" patented technology
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Micro-pore electroplated copper filling method for three-dimensional (3D) copper interconnection high aspect ratio through-silicon-via technology
InactiveCN103361694ALow costFast hole fillingCellsSemiconductor/solid-state device manufacturingMethane sulfonateInterconnection
The invention discloses a micro-pore electroplated copper filling method for a three-dimensional (3D) copper interconnection high aspect ratio through-silicon-via technology. The micro-pore electroplated copper filling method comprises the following steps of: 1, preparing an electroplating solution of a copper methane sulfonate system; 2, wetting micro pores of the through-silicon-via technology through electroplating pretreatment; 3, electrifying and slotting, and increasing the ultralow current diffusion step, so that the copper ion and additives are reasonably distributed on the surfaces and inside the micro pores through the through-silicon-via technology; 4, connecting a silicon wafer where the through-silicon-via technology is positioned with a cathode of a power supply, so that the electroplating surface of the wafer is completely soaked in the electroplating solution, step-by-step current electroplating is performed under the condition that the cathode is rotated or stirred, and the electroplating conditions comprise the current density of 0.01-10A / dm<2> and the temperature of 15-30 DEG C; and 5, completely and thoroughly washing the wafer by using deionized water, performing spin-dry or blow-dry. The provided micro-pore electroplated copper filling method for the 3D copper interconnection high aspect ratio through-silicon-via technology is high in pore filling speed and thin in surface copper, hole and crack risks are avoided, and complete filling of high-difficulty hole with the depth-to-width ratio of more than 10:1 can be realized.
Owner:SHANGHAI SINYANG SEMICON MATERIALS
Recovering lead from a lead material including lead sulfide
In an example of a method for recovering lead from a lead material including lead sulfide, methane sulfonic acid is selected as a leaching acid for the lead material. The lead material is exposed to a solution including the methane sulfonic acid and i) ferric methane sulfonate or ii) oxygen, which leaches lead from the lead sulfide in the lead material, and generates a liquid leachate including a lead-methane sulfonate salt. The liquid leachate is purified, and lead is recovered from the purified liquid leachate using electrolysis.
Owner:THE UNIV OF BRITISH COLUMBIA
Iontophoresis device
InactiveUS20070112294A1Suppress and prevent generationPreventing and suppressing alterationElectrotherapyMethane sulfonateActive agent
An iontophoresis device may be capable of preventing the generation of gas or ions upon energization, and / or may be capable of preventing the alteration of active agent ions due to an electrode reaction. Energization from an electrode to an active agent reservoir may be performed through an ionic liquid. The ionic liquid may include an anion such as PF6-, BF4-, AlCl4-, ClO4-, a hydrogen sulfate ion, bis-trifluoro-alkyl-sulfonyl-imide, or trifluoro-methane-sulfonate, and a cation such as an imidazolium derivative, a pyridinium derivative, a piperidinium derivative, a pyrolidinium derivative, and a tetra-alkyl-ammonium derivative.
Owner:TITI ELLEBEAU INC
Efficient salt-tolerant high-temperature-resistant oil displacement agent for heavy oil reservoirs and preparation method thereof
InactiveCN102703048AAvoid harmPromote sustainable developmentDrilling compositionChromatographic separationSolubility
The invention discloses efficient salt-tolerant high-temperature-resistant oil displacement agent for heavy oil reservoirs and a preparation method thereof. The efficient salt-tolerant high-temperature-resistant oil displacement agent for heavy oil reservoirs is made of, by weigh percent, 10-20% of heavy methane sulfonate, 15-25% of betaine, 3-10% of diether diphenyl sulfonate gemini surfactant, 3-10% of cosurfactant, and 30-40% of water. The efficient salt-tolerant high-temperature-resistant oil displacement agent for heavy oil reservoirs is fine in water solubility and convenient to inject, has no adverse affection on heavy oil reservoirs and is capable of generating no precipitate when instantly cooled to 5 DEG C from higher temperature (105 DEG C), oil-water interface tension is effectively reduced to 10-3mN / m, and the components have no obvious chromatographic separation. In addition, the preparation method is simple, reaction is easy to control, application range is wide, and materials are easy to obtain and low in price.
Owner:合肥新星油田化学剂有限责任公司
Green Glycine Betaine Derivative Compounds And Compositions Containing Same
InactiveUS20130338227A1Easy to cleanImprove antibacterial propertiesBiocideOrganic compound preparationNatural sourceBetaine
Multifunctional green (eco-friendly) and antimicrobial compositions are described containing cationic glycine betaine esters and / or cationic glycine betaine amides. Particular glycine betaine esters and amides are alkyl(ene) betainate methane sulfonates and betainyl amino alkyl(ene) methane sulfonates. The glycine betaine components are cationic, have a hydrophobic group attached to a carboxylate group through an ester or amide linkage, and are derived from a natural source, such as sugar beets. The glycine betaine esters and amides serve as cationic surfactants which have effective antimicrobial activity. The surfactant compositions are effective as crude mixtures or semi-purified mixtures or purified surfactant compounds of glycine betaine components. The addition of sodium chloride or potassium chloride or magnesium chloride or natural gum or polysaccharide to compositions containing the cationic glycine betaine ester and / or glycine betaine amide derivatives serves to thicken or gel the composition.
Owner:SAINT VICTOR MARIE ESTHER +2
Gel-type polymer electrolyte and preparation method thereof
The invention relates to a gel-type polymer electrolyte and a preparation method thereof. The gel-type polymer electrolyte membrane is prepared by using amine terminated nitrile rubber as a matrix of the solid electrolyte, dissolving the matrix, lithium salt, epoxidized polysilsesquioxane, and 1-butyl-3-methylimidazolium trifluoro methane sulfonate in an organic solvent, pouring the solvent on a teflon template, and carrying out heat treatment in a baking oven after volatilizing tetrahydrofuran. Compared with the prior art, the operation is simple; the membrane forming is easy; and the prepared membrane is smooth and uniform, has good mechanical properties, high room-temperature conductivity, and stable electrochemical window, and the prepared membrane used as solid electrolyte materials for the lithium ion battery has an application prospect.
Owner:SHANGHAI JIAO TONG UNIV
Nitrogen methyl side chain-substituted triadimenol antifungal compound and preparation method thereof
The invention provides a nitrogen methyl side chain-substituted triadimenol antifungal compound and a preparation method thereof, namely a 1-(1H-1, 2, 4-triazole-1-yl)-2-(2, 4-difluoro phenyl)-3-(N-methyl side chain-substituted amino)-2-propyl alcohol compound (comprising a racemate thereof, and an R type or S type isomer), and hydrochloride, nitrate, hydrobromide and methane sulfonate and a preparation method of the compound. The compound has a strong antifungal effect on various shallow and deep fungi; and compared with the traditional antifungal medicament in clinical practice, the compound has the advantages of high efficiency, low toxicity and wide antifungal spectrum and can be used for preparing new antifungal drugs. The structural formula of the compound is shown as follows.
Owner:SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
Method for detecting methyl methane sulfonate by gas chromatography and tandem mass spectrometry
ActiveCN104359998AThe detection method is simpleFast detection methodComponent separationGas phaseMethane sulfonate
The invention discloses a method for detecting methyl methane sulfonate by gas chromatography and tandem mass spectrometry. The method is characterized by comprising the following steps: (1) placing a sample to be detected into a volumetric flask, adding acetonitrile to make up to the volume of 10 to 25 ml, carrying out vortex mixing for 1 to 5 min, carrying out ultrasonic extraction for 10 to 15 min, sieving the obtained product by a filter membrane with the specification of 0.22 [mu]m and carrying out sample injection to detect the methyl methane sulfonate in the sample; (2) under the detection conditions, using a gas chromatography and tandem mass spectrometry combined instrument GC-MS / MS as a detection instrument for detecting the methyl methane sulfonate. In the step (1), 0.05 to 0.50 g of the sample to be detected is taken, accuracy reaches 0.1 mg, the sample to be detected is placed in the volumetric flask, the acetonitrile is added to make up to the volume of 10 to 25 ml, vortex mixing is carried out for 1 to 5 min and ultrasonic extraction is carried out for 10 to 15 min. the method can simply, rapidly, conveniently and efficiently carry out qualitative and quantitative detection on MMS (methyl methane sulfonate) in medicine raw materials, chemical reagents and foods by using the GC-MS / MS.
Owner:JIANGSU SINOGRAPHY TESTING
Novel azole antifungal compound and preparation method thereof
InactiveCN101602738AImprove antifungal effectBroad spectrum antifungalOrganic active ingredientsAntimycoticsChemical structureAntifungal
The invention relates to the technical field of medicament, and provides a novel azole antifungal compound and salts thereof, a preparation method and application thereof. The compound has a chemical structure formula as the right, wherein, X is hydroxide radical; Ar is 2,4-difluorophenyl; R1 is hydrogen or a linear chain with 1 to 6 carbon atoms or low alkyl group with unsaturated or saturated branched chain; and R2 is selected from hydrogen, alkyl, halogen, cyano-group, nitryl and alkoxyl, can be positioned on ortho, meta, para positions of a benzene ring, and can be mono-substituted or multi-substituted. Salts of the compound can be hydrochloride, nitrate, hydrobromide or methane sulfonate. Pharmacological tests prove that the compound has strong antifungal activity, has the advantages of high efficiency, low toxicity, wide antifungal spectrum and the like compared with the prior antifungal medicines applied in clinic, and can be used for preparing antifungal medicines.
Owner:SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
Recyclable environment friendly electrolytic stripping solution, preparation method and usage method
The invention discloses a recyclable environment friendly electrolytic stripping solution, a preparation method and a usage method, the recyclable environment friendly electrolytic stripping solution comprises the following components by weight: 10-30% of methanesulfonic acid, 3-10% of tin methane-sulfonate, 1-5% of polyoxytrimethylene polyethenoxy ether, 1-5% of phytic acid and the balance of water. The recyclable environment friendly electrolytic stripping solution has the characteristics of stripping effect, no generation of toxic and harmful gas, recyclable stripping solution, safety, environmental protection, complete satisfaction of environmental requirements of the formula material and stable products, the waste liquid generated during the usage process can be directly and continuously used through electrolysis; the process has the advantages of simplicity, energy efficiency, and convenient usage.
Owner:JIANGSU AISEN SEMICON MATERIAL CO LTD
Paecilomyces thermophila mutant strain and mutation induction method and application thereof
InactiveCN107201315ASimple screening methodFast screening methodFungiMutant preparationAcid-fastBiotechnology
The invention discloses a Paecilomyces thermophila mutant strain and a mutation induction method and application thereof. The mutation induction method includes: Paecilomyces thermophila screened from high-temperature-fermented compost and used for producing high-temperature-resistant and acid-resistant glucose oxidase is used as the original strain, protoplast ultraviolet and ethyl methane sulfonate compound mutation induction is performed, and the screened strain is subjected to budding spore diethyl sulfate-microwave compound mutation induction to obtain the Paecilomyces thermophila mutant strain. The Paecilomyces thermophila mutant strain is preserved in China General Microbiological Culture Collection Center on January 11th, 2016, and the preservation number of the mutant strain is CGMCC No. 13182. Compared with a conventional mutation induction method, the mutation induction method has the advantages that the method is high in efficiency and simple in fast in screening, the productivity of the mutant strain is high, the yield of the mutant stain is 277.65% of that of the Paecilomyces thermophila original strain, fermentation liquor enzyme activity reaches 185U / ml, production cost is lowered, and the glucose oxidase produced by the mutant strain is good in high-temperature resistance and acid resistance and can be used as feed enzyme applied to feed industry.
Owner:XUZHOU UNIV OF TECH
Soybean growth period E1 gene and encoding protein of soybean growth period E1 gene
InactiveCN102643832AStrong inhibition of physiological functionInhibition of physiological functionPlant peptidesGenetic engineeringMethane sulfonateTransgene
The invention discloses a soybean growth period E1 gene and encoding protein of the soybean growth period E1 gene and relates to the soybean growth period E1 gene and the encoding protein of the soybean growth period E1 gene. The invention provides the soybean growth period E1 gene and the encoding protein of the soybean growth period E1 gene. The soybean growth period E1 gene sequence is shown as a sequence table sequence identification number (Seq ID No):1. The amino acid sequence of the encoding protein of the soybean growth period E1 gene is shown as the Seq ID No:2. The E1 gene is clonedby a map-based cloning method, and the physiological function of the E1 gene for intensively inhibiting the soybean flowering is verified through transgenosis and screening of a plurality of ethyl methane sulfonate (EMS) mutant libraries. The invention relates to the field of soybean gene.
Owner:NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
Method for preparing benzisoxazole methane sulfonyl chloride and its amidation to form zonisamide
The present invention relates to a process of preparing benzisoxazole methane sulfonic acid-chloride (BOS—Cl) as an zonisamide intermediate via chlorination of benzisoxazole methane sulfonate. The present invention also discloses a process of preparing zonisamide via amidation of BOS—Cl. More particularly, the present invention provides a process of preparing zonisamide, comprising the steps of: a) chlorinating BOS, salts or esters thereof, with SOCl2 in an organic solvent and / or in the presence of a catalyst to form BOS—Cl; and b) amidating BOS—Cl in the presence of ammonia selected from the group consisting of aqueous ammonia in a biphasic system, masked ammonia and dry ammonia to form zonisamide.
Owner:TEVA PHARM USA INC
Foliage fertilizer suitable for grape planting and preparation method thereof
InactiveCN107593258AEasy to usePromote absorptionCultivating equipmentsFertilizer mixturesVitis viniferaSulfate
The invention relates to foliage fertilizer suitable for grape planting and a preparation method. The foliage fertilizer comprises, by weight, 30-35 fermented organic fertilizer, 20-25 parts of urea,10-15 parts of mushroom residue powder, 8-12 parts of plant ash, 6-10 parts of animal bone powder, 3-6 parts of calcium superphosphate, 2-5 parts of potassium phosphate, 1-3 parts of manganese sulfate, 1-3 parts of boric acid, 0.5-1.5 parts of zinc sulfate and 0.2-0.5 part of ethyl methane sulfonate. By adopting the foliage fertilizer and the preparation method, the problem of using waste materials is solved, sufficient and comprehensive nutrient elements are provided for growing of grape plants, nutrition needed by the plants can be quickly supplemented, and the foliage fertilizer is easy forleaves of the plants to absorb, can promote branches and buds to grow and can make grape fruits to expand, so that fruit yield is increased, and yield and income are increased for growers.
Owner:桐梓县茅石乡龙会村蔬菜种植场
Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis
InactiveCN102719845AEliminate troublePrevent escapeOrganic chemistryElectrolysis componentsElectrolytic agentMethane sulfonate
The invention provides a method for preparing tin methane sulfonate through hydrogen-free electrolysis, and relates to the field of manufacturing the tin methane sulfonate through industrial electrolytic synthesis and can be used for directly preparing a tin methane sulfonate solution through using an electrolytic process. According to the method provided by the invention, electrolyte is a methanesulfonic acid solution; a cathode of an electrode is a gas diffusion electrode, and an anode of the electrode is solid tin; the cathode and the anode are separated through a membrane; the electrolyte temperature is controlled within a range of 0-60 DEG C; a current density is set within a range of 10-800 A / m<2>; the electrolyte is stopped until a content of free methyl sulfuric acid in the anode electrolyte is up to 0.1-10 g / L; and the anode electrolyte is filtered and concentrated, so as to prepare the tin methane sulfonate solution with different concentrations. The method provided by the invention is suitable for being carried out at the constant temperature and the constant pressure, so that the tin methane sulfonate solution with high purity can be directly obtained. The method provided by the invention has the characteristics of being simple in process, free from separation, high in product purity, low in energy consumption and low in cost.
Owner:宜兴方晶科技有限公司
Method for synthesizing crylic acid by catalyzing acetylene carbonyl through palladium
InactiveCN101768070AReduce energy consumptionLow investment costOrganic-compounds/hydrides/coordination-complexes catalystsCarboxylic preparation from carbon monoxide reactionReaction temperatureP-Toluenesulfonic acid
The invention provides a method for synthesizing crylic acid by catalyzing acetylene carbonyl through palladium. Acetylene, carbon monoxide and water are used as raw materials and are catalyzed to synthesize the crylic acid under the conditions that the reaction temperature is between 15 and 70 DEG C and the pressure is between 1.5 and 6MPa. The adopted catalyst uses palladium diacetate as a main catalyst; the dosage of the main catalyst is less than that of a traditional nickel-copper catalyst and is only 1 / 50; sulfoacid, such as methane sulfonate, trifluoromethane sulfonic acid, p-toluenesulfonic acid or the like, serves as an aid; an addition amount of the additive is that the ratio of n(-SO3H) to n(Pd2<+>) is equal to 1:1-10:1; and organic phosphine such as 2-pyridyl diphenylphosphine (2-PyPPh2) as a ligand. Compared with the nickel-copper catalyst, the catalyst has remarkable advantages that: under the mild conditions, such as the temperature of 40 DEG C and the pressure of 5 MPa, the catalyst can catalyze the acetylene carbonyl to synthesize the crylic acid at high efficiency, can effectively avoid the acetylene and the crylic acid undergoing polymerization and other side reactions, saves energy, and has safe operation and low operating expense.
Owner:CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
Process for making 5-lipoxygenase inhibitors having varied heterocyclic ring systems
InactiveUS6344563B1Organic active ingredientsAntipyreticPhosphonium saltTetra-n-butylammonium chloride
process is described for preparing a compound of Formula (1.3.0):comprising: establishing a reaction mixture consisting ofin an aprotic solvent; in the presence of a strong base in solid form selected from the group consisting of sodium hydroxide, NaOH; and potassium hydroxide, KOH;-and optionally-in the presence of a catalytic amount of cesium carbonate, Cs2CO3, or of a phase transfer catalyst, especially a quaternary ammonium salt or a phosphonium salt-followed by-heating said reaction mixture under a nitrogen atmosphere; whereby there is produced a compound of Formula (1.3.0); and in a preferred embodiment the aprotic solvent is DMSO, the strong base in solid form is NaOH in powder or pellet form, and the phase transfer catalyst is tetra-n-butylammonium chloride (TBAC), which is used to prepare a preferred compound, useful as a 5-lipoxygenase inhibitor, of the formula:especially the substantially pure methanesulfonate salt thereof.
Owner:NORRIS TIMOTHY +2
Screening method for glyphosate-resisting medicago sativa plants
InactiveCN104255403AEasy and fastCultivating equipmentsPlant genotype modificationGermplasmScreening method
The invention mainly provides a medicago sativa plant resistant to herbicide and a method, particularly relates to a method for screening medicago sativa plants resistant to the herbicide by utilizing chemical mutagen EMS (ethyl methane sulfonate) for mutagenesis of medicago sativa, and discloses a culture medium screening method for glyphosate-resisting medicago sativa plants. The method is characterized by including the following steps: (1) germinating seeds by an MS culture medium; (2) performing dosage screening; (3) subjecting medicago sativa seeds to mutagenesis by median lethal dose of the EMS; (4) screening the glyphosate-resisting medicago sativa plants; (5) rescreening the resistant plants. The method has the advantages of being simple and easy to implement, taking effect fast and capable of allowing single plants of herbicide-resistant medicago sativa to be obtained within a short time. A mutagenesis way is adopted. The chemical mutagen EMS is utilized to mutate the medicago sativa seeds to generate point mutation, the single plants of the herbicide-resistant medicago sativa are screened by two ways of the culture medium and soil screening, new germplasm resources are provided for conventional breeding, and certain references are provided for herbicide-resistant breeding of other plants.
Owner:LANZHOU UNIVERSITY
Method for electroplating metals of tin and bismuth
InactiveCN101538726AUniform thicknessEvenly distributed ingredientsSquare decimeterMethane sulfonate
The invention relates to a method for electroplating metals of tin and bismuth, which is characterized by comprising 40-80g / l of tin methane-sulfonate and 1-3g / l of bismuth methane-sulfonate in terms of volume mass ratio, and also comprising 100-280ml / l of methylsulfonic acid, 30-100ml / l of additive SNB31 produced by Dr. Ing Max Schlotter GmbH & Co. KG, 5-15ml / l of additive SNB14 produced by Dr. Ing Max Schlotter GmbH & Co. KG, and the balanced water in terms of volume ratio; and the electroplate liquid is used for electroplating for 1.5-2.5min with a current density of 10-20 ampere / square decimeter and at a temperature of 35-65 DEG C. The cathode plate of the plating tank containing the electroplate liquid is a conveying steel belt, and the distances between an electroplating part and two anode plates are the same. The tin and bismuth metal layers electroplated by the invention have uniform thickness and even distribution of bismuth, and tin and bismuth metal layers have good weldability.
Owner:WUXI WELNEW MICRO ELECTRONICS
Sulfonic acid type semi-bright pure-tin electroplating liquid
Sulfonic acid type semi-bright pure-tin electroplating liquid comprises methanesulfonic acid with the concentration being 100-120g / L, tin methane sulfonate with the concentration being 200-250g / L, a brightener with the concentration being 2-8g / L, a stabilizer with the concentration being 5-10g / L, a lubricant with the concentration being 10-15g / L and a grain refiner with the concentration being 2-5g / L. The stabilizer comprises ethyl alcohol with the concentration being 2.5-4 mol / L, sodium sulfite with the concentration being 3.0-5.0 mol / L and ferrous sulfate with the concentration being 0.5-1.5 mol / L. According to the semi-bright pure-tin electroplating liquid, alkyl stannous sulfonate is adopted as main salt, and the sulfonic acid type semi-bright pure-tin electroplating liquid is high in dispersing capacity, stable and efficient under the cooperative effect of the brightener, the stabilizer, alkyl sulfonate, a wetting agent, the grain refiner and other components.
Owner:WUXI QIAOYANG MACHINERY MFG
Method for producing mutant of hemerocallis middendorffii by in vitro mutagenesis of ethyl methane sulfonate
InactiveCN106973791AImprove seedling efficiencyImprove the level of breeding technologyPlant tissue cultureHorticulture methodsLethal doseNormal growth
Owner:INST OF DRY LAND FARMING SHANXI ACAD OF AGRI SCI
Method for quickly and efficiently constructing good S yeast strain
InactiveCN101525612AGood fermentation propertiesImprove salt toleranceMutant preparationHybrid cell preparationBiotechnologyGenetic diversity
The invention relates to a method for quickly and efficiently constructing good S yeast strain. On the basis of determining the optimal acting time of EMS (methyl methane sulfonate) on amphiploid cells of S yeast (namely, Saccharomycesrouxii used in soya sauce enterprises), S yeast amphiploid of non-conventional yeast strains is subjected to random mutagenesis by using EMS to generate an S yeast genetic diversity strain library, and genome rearrangement is generated among the strains in the library through multiple sexual recombination of efficient spore generation, spore purification, full integration and salt-resistant screening so as to construct S yeast recombinant strain with good fermentation performance. The salt resistance of the recombinant strain constructed by the method is obviously improved, the fermentation period is shortened by 10 days, the generated flavor substances are obviously improved compared with wild strains, and an important flavor substance 4-EG is also generated; and the good strain can generate thick and ester-flavor soya sauce flavor in high salt liquid state fermentation, has better physicochemical standard, and is provided for the industrial production of soya sauce.
Owner:TIANJIN UNIV OF SCI & TECH
Rustproof repairing method for reinforced concrete structure
ActiveCN103011741AImprove toughnessImprove collaboration performanceBuilding repairsBridge erection/assemblySilanesRebar
The invention discloses a rustproof repairing method for a reinforced concrete structure, belonging to the technical field of building materials. The rustproof repairing method provided by the invention adopts a method for repairing a composite aluminum wire mesh by cement-based polymer repairing mortar to repair the reinforced concrete with cracks. The polymer repairing mortar comprises the following components in percentage by weight: 35% of high-alumina cement, 11% of talcum powder, 43% of quartz sand, 4% of anhydrous anhydrite powder, 2% of silane modified phenylpropyl glue powder, 1.3% of water reducing agent, 0.7% of shrinkage reducing agent and 3% of tin methane sulfonate. The rustproof repairing method provided by the invention can remarkably improve the mechanical properties of the reinforced concrete structure and also can remarkably improve the rustproof capacity and durability of the reinforced concrete structure. Moreover, the rustproof repairing method has a simple technical process and low material cost, and can be extensively applied to the reinforcing field of the concrete structures.
Owner:CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP XIAMEN HONGYE
Multistage process for the preparation of highly pure deferoxamine mesylate salt
InactiveUS6858414B2High purityReduce adverse effectsIon-exchange process apparatusCarbamic acid derivatives preparationDeferoxamine mesylatePurification methods
The present invention provides a purification process whereby deferoxamine B produced by a microorganism and in mixture with other polyhydroxamates produced by the microorganism may be converted into its mesylate salt substantially free of the other polyhydroxamates and substantially free of chloride ion. The process includes adsorption and desorption of the deferoxamine B on an adsorption resin, direct precipitation of the deferoxamine free base out of the eluent from the adsorption resin, contacting of the deferoxamine B free base with methanesulfonic acid and isolation of the deferoxamine B mesylate salt by precipitation. This process minimizes decomposition of deferoxamine B.
Owner:TEVA PHARM USA INC
Method for preparing solution of tin methane sulfonate
InactiveCN101560677AReduce investmentSimple processElectrolysis componentsElectrolytic organic productionMethane sulfonic acidMethane sulfonate
The invention relates to a method for preparing a solution of tin methane sulfonate for electroplating. The method is characterized by comprising the following steps that: 1) an anion exchange membrane is used for dividing an electrolytic cell into a cathode chamber and an anode chamber, wherein the electrolyte used in the anode chamber is a solution of methane sulfonic acid with the mass concentration of between 20 and 40 percent, and the electrolyte used in the cathode chamber is a solution of methane sulfonic acid with the mass concentration of between 10 and 50 percent; the anode in the anode chamber is made of a tin plate or tin flower, and the cathode in the cathode chamber is made of a tin plate or copper plate; and 2) the anode and the cathode are connected with a DC power supply for electrolysis, the electrolytic temperature is between 20 and 60 DEG C, and under the action of the DC with the voltage of 1.8 to 3V, the anode is subjected to anodic dissolution and enters the anode chamber; and when the concentration of tin ion in the anode chamber reaches between 100 and 130g / L, the electrolysis stops, and the electrolyte in the anode chamber is taken out and filtered, and the filtrate is subjected to vacuum concentration at a temperature of between 40 and 120 DEG C, so that the solution of tin methane sulfonate, of which the content of tin ion is 300 to 310g / L, can be obtained. The method has the advantages of less equipment investment, simple process and high product purity.
Owner:XIAOCHANG GOLDEN COCK CHEM
Method for preparing nafamostat hydrochloride and nafamostat mesylate
InactiveCN103012214ASolid state goodImprove solubilityOrganic compound preparationSulfonic acids salts preparationOrganic solventMethane sulfonate
The invention relates to a method for preparing nafamostat hydrochloride and nafamostat mesylate. The method comprises the following steps of: reacting n-guanidine benzoyl chloride hydrochloride with a methanesulfonic acid 6-guanyl-2-isonaphthol compound under an action of an alkali organic solvent to prepare nafamostat hydrochloride, wherein the alkali organic solvent does not comprise dicyclohexyl carbodiimide; and reacting the nafamostat hydrochloride and the methanesulfonic acid under a mixed liquid of the water and the organic solvent to prepare the nafamostat mesylate. The preparation method is simple in process, high in yield, low in content of impurities and suitable for industrial production.
Owner:NANJING CHANGAO PHARMA SCI & TECH CO LTD
Method for preparing micro-nano needle conical structure for copper interconnection by electrochemical deposition
The invention discloses a method for preparing micro-nano needle conical structure for copper interconnection by electrochemical deposition; a conductive base material is used as a cathode and is placed in a electroplating solution containing copper ions, complexing agents and additives, after current is applied, the electrocrystallization grows vertically along one-dimension which is vertical to the surface direction, thereby the micro-nano needle conical structure for copper interconnection is formed on the conductive base material surface; the copper ion is provided by copper methane sulfonate or is mainly provided by copper methane sulfonate, and is supplemented by more than one or two of cupric chloride, copper pyrophosphate and cupric nitrate. The invention provides a preparation method which has the advantages of simple process, low cost without special requirements for substrate shape and material, and is suitable for industrialized batch production of micro-nano needle conical structure for copper interconnection; in addition, according to the preparation method provided by the invention, a copper needle conical crystal structure can be directly formed on the surface of the required base material, and the structure can be used as device and material, thereby providing possibility for realization of industrialized production and wide application.
Owner:SHANGHAI JIAO TONG UNIV
Preparation method of 1-(4, 5-dihydro-2-thiazolinyl)-3-mercaptoazetidine hydrochloride
ActiveCN102250080ARaw materials are easy to getSimple process routeOrganic chemistryHydrogenMethane sulfonate
The invention discloses a method for synthesis of 1-(4, 5-dihydro-2-thiazolinyl)-3-mercaptoazetidine hydrochloride. With 2-methylthio-2-thiazoline (I) as the raw material, the method of the invention comprises the steps of: in the presence of alkali, reacting 2-methylthio-2-thiazoline (I) with 3-hydroxyazetidine hydrochloride so as to obtain 1-(4, 5-dihydro-2-thiazolinyl)-3-hydroxyazetidine (II), and reacting (II) with methyl sulfonylchloride in the presence of alkali so as to obtain 1-(4, 5-dihydro-2-thiazolinyl)-3-methane sulfonate group azetidine (III), subjecting (III) to a reaction with potassium thioacetate so as to obtain 1-(4, 5-dihydro-2-thiazolinyl)-3-thioacetic acid ester group azetidine (IV), in the presence of alkali, subjecting (IV) to hydrolysis and then to acidification with dilute hydrochloric acid, thus obtaining the 1-(4, 5-dihydro-2-thiazolinyl)-3-mercaptoazetidine hydrochloride (V). With easily available and inexpensive starting material, the method of the invention simplifies the synthesis route, improves the raw material utilization ratio and the overall yield. An intermediate obtained in the reaction can be subjected to refinement by a recrystallization method or to a next reaction directly, so that the yield is high and the "three wastes" produced during the reaction process are few. In addition, with low cost, the method of the invention is beneficial for industrial production.
Owner:GUANGZHOU BAIYUNSHAN PHARMA HLDG CO LTD BAIYUNSHAN PHARMA GENERAL FACTORY
Electroplating liquid of cyanide-free silver plated tin alloy and electroplating method thereof
The invention provides electroplating liquid of a cyanide-free silver plated tin alloy and an electroplating method. Silver methane sulfonate and tin methane sulfonate are used as main salt of a silver plated tin alloy; carving sulfonic acid is used as a complexing agent; other additive components are compounded for improving the effect; cyanide-free electroplating silver tin alloy solution contains no cyanide, is free of poison and harm to environments and human bodies, is reasonable in formula, and is excellent in stability; pulse electroplating is used during electroplating, so that such problems as high plating layer strain and brittleness and weak binding force are effectively solved, and a plating layer with good binding performance with a basal body, low strain and good compactness and brightness is obtained; the obtained silver plated tin alloy layer is suitable for application of reflecting layers, high electric conducting layers and brazing plating layers in the fields of photoelectricity and microelectronics; and the formed plating layer can improve the microelectronic packing electric conductivity and reliability, and largely reduces the signal distortion caused by circuit resistance.
Owner:HUIZHOU LEADAO ELECTRONICS MATERIAL
Electroplating copper cylinder solution suitable for oversize current density and electroplating method
ActiveCN111074306AReduce processing timeImprove reliabilityCellsSemiconductor devicesMeth-Methane sulfonate
The invention discloses an electroplating copper cylinder solution suitable for the oversize current density and an electroplating method. The electroplating copper cylinder solution comprises the following components by concentration: 150-240 g / L of copper methane sulfonate, 40-70 g / L of methanesulfonic acid, 30-50 mg / L of chloridion, 2-5 mg / L of bis-(sodium sulfopropyl)-disulfide, 40-100 mg / L ofpolyethylene glycol, 40-80 mg / L of Janus green, and the balance of DI pure water. The components are evenly mixed to form the electroplating copper cylinder solution suitable for the oversize currentdensity; before electroplating, a wafer needs to be subjected to vacuum treatment through a pretreatment solution; the pretreatment solution is the DI pure water, the wafer is mounted through an electroplating hanger, and then is vacuumized in vacuum equipment for 5-10 min through the DI pure water; and after vacuumizing, electroplating is conducted in the electroplating copper cylinder solution.According to the electroplating copper cylinder solution provided by the invention, the problem is completely solved, especially through adding of the Janus green, an additive is adsorbed on the surface of a seed layer, a copper cylinder is evenly electroplated on the surface of a substrate, and performance indexes that scorch is avoided, and the arch rate is less than or equal to 5% can be met.
Owner:江苏矽智半导体科技有限公司
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