1168 results about "Methanesulfonic acid" patented technology

The invention discloses a method for preparing a compound of a formula (I) or pharmaceutically acceptable salts thereof. The method is characterized by comprising the following steps of: (1) using a compound of a formula (II) as a raw material and carrying out a reduction and amination reaction with an appropriate reducing agent to obtain a compound of a formula (III); (2) using 2-quinary heterocyclic substituted ethanol as a raw material and reacting to obtain a compound of a formula (IV) under the conditions of appropriate reagent, temperature and solvent; (3) after carrying out chiral separation on the compound of the formula (III), carrying out a condensation reaction with the compound of the formula (I) under an alkaline condition to obtain a compound of a formula (V); and (4) carrying out demethylation protection on the compound of the formula (V) under the condition of appropriate temperature and solvent to obtain the compound of the formula (I), wherein R1 in each formula is selected from C1-8 alkyl groups or aromatic bases which can be arbitrarily substituted, X is selected from halogen atoms or p-toluenesulfonic acid groups and methanesulfonic acid groups for protecting alcoholic extract hydroxyl groups, and Y is selected from O, S and N. A target product obtained by the method has high optical purity, convenient operation, lower cost, higher yield and less pollution and is suitable for industrialized production.

PCT No. PCT/JP96/00748 Sec. 371 Date Nov. 15, 1996 Sec. 102(e) Date Nov. 15, 1996 PCT Filed Mar. 22, 1996 PCT Pub. No. WO96/29099 PCT Pub. Date Sep. 26, 1996Hydrogen sulfide is dehydrogenated to generate a HS group and an S group. The HS group is oxidized to generate sulfuric acid, which is bonded to a metal. The S group is polymerized with a CH3S group to generate methyl trisulfide or methyl tetrasulfide, which is adsorbed to an adsorbent. Methyl mercaptan is dehydrogenated, for example, to generate a CH3S group. A portion of the CH3S group is oxidized to generate methanesulfonic acid, which is bonded to a metal. Another portion of the CH3S group is polymerized with the CH3S group itself to generate methyl disulfide, at least a portion of which is adsorbed to an adsorbent. Still another portion of the CH3S group is polymerized with the S group to generate methyl trisulfide or methyl tetrasulfide, which is physically adsorbed to an adsorbent. In this manner, malodor components including hydrogen sulfide and methyl mercaptan can efficiently be removed without producing or release of harmful secondary products. A simple-structure, compact deodorizing apparatus including appropriate metal oxide catalyst and an adsorbent material suitable for achieving the above deodorizing functions is incorporated in a toilet bowl.

The invention relates to a methanesulfonic acid-based matte pure tin electroplating solution and an additive thereof. Each liter of an aqueous solution agent of the additive comprises the following components based on concentration: 1.5g/L-3g/L of grain refiner, 100g/L-200g/L of non-ionic surfactant, 10g/L-30g/L of antioxidant and 100g/L-150g/L of organic solvent, wherein the grain refiner is particularly heterocyclic compounds, amine compounds or a mixture of the two. The electroplating solution prepared by the additive in the invention has the advantages of good scatter performance, high flexibility and extensibility of the pure tin-based electroplating layer, and good weldability, and prevents the tin whisker from growing for a long time; and meanwhile, the electroplating solution contains no non-biodegradable substances or surfactant harmful to the environment and the like, thus facilitating the treatment of sewage and meeting the requirements for environmental protection. The invention is worthy of popularizing and applying.

The invention relates to a preparation method of a polybenzimidazole crosslinking membrane that is crosslinked with bihalohydrocarbon or polyhalohydrocarbon, which takes amino dibasic acid and aromatic tetraamine as monomer raw material and polyphosphoric acid as reaction medium and reaction is carried out for 5-30 hours at 150-220 DEG C under the nitrogen protection condition so as to obtain homopolymer containing amino polybenzimidazole, and takes the amino dibasic acid, nonaminonic dibasic acid and the aromatic tetraamine as the monomer raw materials to prepare copolymer containing amino polyphosphoric under the same conditions. The prepared homopolymer and the copolymer of the polybenzimidazole have good dissolvability in solvents of dimethyl sulphoxide, N, N-dimethylacetamide, phosphate, vitriol and methane-sulforic acid, etc. Both the structures of the homopolymer and the copolymer of the polybenzimidazole contain amino that can be used for crosslinking. The bihalohydrocarbon or the polyhalohydrocarbon is used as cross linking agent. The polybenzimidazole crosslinking membrane with good property can be prepared through crosslinking reaction of the amino contained in the polybenzimidazole and the bihalohydrocarbon or the polyhalohydrocarbon.

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.

The invention relates to a method for preparing a polybenzimidazole crosslinking membrane by using epoxy compounds, which takes amino dibasic acid and aromatic tetraamine as monomer raw material and polyphosphoric acid as reaction medium and reaction is carried out for 5-30 hours at 150-220 DEG C under the nitrogen protection condition so as to obtain homopolymer containing amino polybenzimidazole, and takes the amino dibasic acid, nonaminonic dibasic acid and the aromatic tetraamine as the monomer raw materials to prepare copolymer containing amino polyphosphoric under the same conditions. The prepared homopolymer and the copolymer of the polybenzimidazole have good dissolvability in solvents of dimethyl sulphoxide, N, N- dimethylacetamide, phosphate, vitriol and methane-sulforic acid, etc. The bifunctionality or polyfunctional epoxy compounds are used as cross linking agent. The polybenzimidazole crosslinking membrane that has good property can be prepared through crosslinking reaction of the amido contained in the polybenzimidazole and epoxy functional groups contained in the bifunctionality or polyfunctional epoxy compounds.

The invention provides a novel synthesis method for pimavanserin. The method comprises the steps that a compound formula (1a) is adopted as a raw material for preparing an active urea compound formula (1) and then subjected to a reaction with a compound formula (2) under an alkaline system to obtain a pimavanserin free alkali formula (3), and then pimavanserin free alkali forms a salt with tartaric acid to obtain a pimavanserin half tartrate formula (4). The method is simple in technological path, low in cost and suitable for industrial production. The formula is shown in the description, wherein HmA is the general formula of m-basic acid, HnA is the general formula of n-basic acid, m and n are 1 or 2 or 3, and the m-basic acid and the n-basic acid are selected from sulfuric acid, hydrochloric acid, phosphoric acid, p-toluenesulfonic acid, benzenesulfonic acid, methanesulfonic acid, methanoic acid, acetic acid, trifluoroacetic acid, oxalic acid, citric acid or tartaric acid.

The invention relates to a process for the preparation of 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid and of the trihydrated monosodium salt thereof, consisting of reacting 4-aminobutyric acid with a phosphonation mixture formed by phosphorous acid and methanesulfonic anhydride and thereafter hydrolyzing the product of said reaction and isolating the products by adjustment of the pH.

The disclosed preparation method for acetylized glucal comprises: preparing the D-acetylized glucose catalyzed by acids (HClO4, H2SO4, ZnCl2, AlCl3, p-toluenesulfonic acid and methanesulfonic acid); without separation or purification, leading directly the product into HBr or equivalent (such as PBr3 and water) to obtain and then recrystallize the coarse 1-bromoacetyl glucose with one of ethyl ether, propyl ether and isopropyl ether; adding Zn, ZnCl2, methanol and Co-ion catalyst to prepare the coarse target; recrystallizing with alcohol for the refined product. This invention saves step and reduces cost.

The invention relates to a preparation method of a covalent-ion cross-linked film of sulfonated polyimide containing imidazolyl. The preparation method comprises the following steps: 1, 4, 5, 8-naphthoic tetracarboxylic dianhydride, sulfonated diamine, common non-sulfonated diamine and diamine containing imidazolyl are added into a metacresol medium, the sulfonated polyimide containing imidazolyl is obtained by copolycondensation under the presence of triethylamine and benzoic acid and the protection of nitrogen; a solution casting method and proton exchange are adopted to prepare non-covalent cross-linked sulfonated polyimide film containing imidazolyl which is then processed by methane-sulfonic acid/phosphorus pentoxide solution or phosphoric acid solution or polyphosphoric acid containing phosphorus petoxide so as to prepare the covalent-ion cross-linked film of sulfonated polyimide containing imidazolyl. The covalent-ion cross-linked film obtained by the preparation method has anti-free radical oxidation susceptibility which is far better than the common sulfonated polyimide or non-covalent cross-linked film without containing imidazolyl and has potential application prospect in the fields of fuel cells and the like.

The invention relates to an environment-response intelligent weave fabric and relative preparation. Wherein, adding the fabric which is induced by argon microwave low-temperature plasma to generate free group on surface, into the dual monomer solution of 2-acrylamide-2-methanesulfonic acid and N-isopropyl acrylamide that contains N and N'-methylene dual acrylamide cross linker to process graft polymerization reaction, while the bath ratio is 1:40, to graft the dual intelligent gel on the fiber macromolecule of fabric, to attain said inventive product. When the invention is dry, it has no difference from general fabric, but when it is wet, the gel will adsorb water to expand and block the slits between fibers, to reduce the water and gas permeability of fabric, and avoid outer penetrating into the inner layer of fabric to stop heat emission. The invention can be used to produce army waterproof clothes, heat-accumulation temperature adjustable special clothes, etc.

The invention discloses a high-speed tinning solution and a preparation method thereof. Deionized water is added to a clean beaker until the volume of the water accounts for 1/2 that of the beaker; a required amount of methanesulfonic acid is measured through a measuring cylinder and put in the beaker, and the mixture is stirred uniformly; a required amount of tin methanesulfonate is measured through the measuring cylinder and put in the beaker, and the mixture is stirred uniformly; additives with the concentration being 60-100 ml/L are added to a tin methanesulfonate solution and stirred uniformly; the deionized water is added until the mixture is in a predetermined volume, and the high-speed tinning solution is prepared. Plating with uniform color and consistent crystal grains is obtained in a wider current density range, formation of tin whisker is effectively controlled, the anti-tarnishing capability and the excellent weldable performance of the plating are guaranteed, the current density can be increased to the greatest extent, the anti-tarnishing capability and the weldable performance are guaranteed, meanwhile, a defoaming agent is not used, and fewer organic impurities are mixed in the plating.

The invention discloses a high-speed embossment electroplating method applied to copper interconnection. A sulfonic acid copper system electroplating liquid is adopted to carry out copper column embossment electroplating; the electroplating conditions are as follows: the current density is 1-25A/dm<2>, and the temperature is 15-35 DEG C; the electroplating liquid comprises 160-350g/L high-purity methanesulfonic acid copper salt, 30-180g/L high-purity methanesulfonic acid and 10-80mg/L chloride ions; the electroplating liquid further comprises 1-10ml/L of an accelerator and 1-10ml/L of a leveling agent; the accelerator is UPB3221A and comprises one or a mixture of several of polydithio dipropane sodium sulfonate, alcohlpropane sulfonate, phenyl dithio propane sodium sulfonate, 3-sulfenyl-1-propanesulfonic acid sodium salt and dimethyl-dithio formamide sulfonic acid; and the leveling agent is UPB3221L and comprises one or a mixture of several of polyethylene glycol, a fatty alcohol alkoxy compound, an ethylene oxide-propylene oxide block copolymer of which the molecular weights are respectively 400, 1,000, 6,000 and 20,000. The high-speed embossment electroplating method applied to copper interconnection, disclosed by the invention, ensures that a copper column has good reliability and uniformity, and at the same time has a relatively high electroplating speed.

A process for chemically synthesizing 1, 2, 3, 4-tetrazolium includes such steps as dissolving zinc trifluoro methylsulfonate in water, adding nitrile and sodium azide, reacting, adding acid for neutralizing and filter. Its advantages are high output rate, and no pollution.

Belonging to the field of modified silica gel adsorbents, the invention particularly relates to an amidoxime group containing modified silica gel adsorbent specific to heavy metal copper ions in an adsorption solution and a preparation method thereof. The preparation method includes: taking silica gel as a starting raw material, conducting activation by a methanesulfonic acid solution, performing impregnation in a toluene solution of KH580, carrying out drying, then adding the obtained dry particles into an N, N-dimethylformamide solution of acrylonitrile to undergo first modification, and carrying out a treatment, then adding the dried first modified particles into a mixed solution of a hydroxylamine hydrochloride solution and a sodium carbonate solution to perform second modification, and conducting a treatment, thus obtaining dried second modified particles, i.e. an amidoxime group containing modified silica gel adsorbent finished product. Compared with an adsorption capacity of 0.5mg/g of the original silica gel, the adsorption capacity of the amidoxime containing modified silica gel adsorbent involved in the invention is substantially increased to 20mg/g.

The present invention relates to a method of electrochemical polishing of surfaces of titanium or titanium-containing alloys, such as Nitinol. An electrolyte is used that comprises methanesulfonic acid and one or more alkanediphosphonic acids. These alkanediphosphonic acids can optionally be substituted with hydroxy and/or amino groups. A further aspect of the present invention relates to the use of said electrolyte for the electropolishing of titanium or titanium-containing alloys.

Hydrocarbon liquids and olefins can be made from methane with greater efficiency than previously available, by converting methane into methanesulfonic acid (MSA), then converting the MSA into a reactive anhydride called sulfene, H₂C═SO₂. Sulfene will exothermically form ethylene, an olefin. It also can insert methylene groups (—CH₂—) into hydrocarbon liquids, to make heavier and more valuable liquids. Other options are disclosed for improved methods of making MSA (such as by using di(methyl-sulfonyl) peroxide as a radical initiator), for converting MSA into products such as dimethyl ether (DME), and for using DME as a “peak shaving” gas that can be injected into natural gas supply pipelines with no disruptions to end-use burners.

The invention relates to a method for separating and purifying polymyxin E methanesulfonic sodium from a mixture containing small-molecular weight impurities. The method adopts an ultrafiltration membrane with the cutoff molecular weight ranging from 1,000 to 10,000 to carry out separation and purification. The invention also relates to a method used for preparing high-purity E methanesulfonic sodium by controlling reaction conditions and making use of ultrafiltration membrane separation technology. The method comprises the following steps: (a) adding water to dissolve polymyxin E sulfate andthen adding formaldehyde solution in the solution to carry out reaction; (b) adding sodium bisulfite solution in the reaction products of step (a) to carry out reaction continuously; and (c) taking the reaction solution of step (b) and adopting the ultrafiltration membrane to carry out separation and purification. The method of separating and purifying the polymyxin E methanesulfonic sodium has the advantages of low pollution, low energy consumption, simple process, good repeatability and high purity and activity of obtained products.

The invention mainly discloses a processing technique of 2,6-ditbutyl-4-methylphenol, which mainly comprises the steps of: alkylating methylphenol and isobutene and then neutralizing and washing the alkylated product. The processing technique of the 2,6-ditbutyl-4-methylphenol is characterized in that a catalyst with a usage amount of 0.3-1.5% mole percent of the methylphenol is added in the process of the alkylation of the methylphenol and the isobutene; the alkylated product after being washed is directed refined; methods of reduced pressure distillation and re-crystallization are jointly carried out in the refining process; and then the finished product of the 2,6-ditbutyl-4-methylphenol is obtained through offcentering and drying steps. The processing technique of the 2,6-ditbutyl-4-methylphenol has the advantages as follows: the yield of a course product of BHT (butylated hydroxytoluene) can reach 92% or higher with the adoption of methanesulfonic acid or sulfamic acid as a novel catalyst for the alkylation, and the purity of the pure product can reach 99% or higher through the joint of the reduced pressure distillation and the re-crystallization.

This invention relates to an anti-infective compound, more specifically, 6-fluoro-1-methyl-4-oxo-7-(1-piperazine)-4H-[1, 3] thiazine [3, 2-a] quinoline-3-carboxylic mesylate (compound I), its preparation method and its application. Compound I is prepared by reaction of 6-fluoro-1-methyl-4-oxo-7-(1-piperazine)-4H-[1,3]thiazine[3,2-a]quinoline-3-carboxylic acid and methyl sulfonic acid. Compound I can be used as effective component and mixed with normal pharmaceutical carrier to manufacture anti-infective drug composition, which can be tablets, capsules, granules, injection, eye preparations, ear preparations, gynecological preparations, and external use preparations. Compound I has stable properties, and can be easily dissolved in water, thus can be easily manufactured into various preparations used in clinical treatment. The method has such advantages as simple and reasonable process.

The present patent application is directed to 4-[(3-fluorophenoxy)phenylmethyl]piperidine methanesulfonic acid salt (formula I), its synthesis and a method for treating and/or preventing a serotonine and/or norepinephrine mediated disease or condition. The present invention is also directed to pharmaceutical compositions comprising the same.

A synthetic acid composition for use in oil industry activities, said composition comprising: urea and methanesulphonic acid in a molar ratio of not less than 0.1:1; a metal iodide or iodate; an alcohol or derivative thereof.

The invention provides a cleaning agent for an automobile cooling system. The cleaning agent comprises, by weight, 3 to 20% of glycolic acid, 2 to 9% of citric acid, 2 to 10% of methanesulfonic acid, 1 to 10% of ammonium citrate, 0.5 to 7% of a corrosion inhibitor and 0.01 to 2% of a surfactant, with the balance being deionized water. The cleaning agent for the automobile cooling system in the invention can effectively remove calcium scale, magnesium scale and iron rust in the cooling system, is applicable to cleaning of a variety of materials like carbon steel, iron, copper and aluminum in a cooling system of an engine and has the advantages of high efficiency, mildness and a low corrosion rate. The cleaning agent is applicable to general repair and maintenance of an automobile and is used for removing dirt generated due to usage of water as a cooling medium so as to increase the efficiency of heat transfer between the engine and the cooling medium and enable operation of the engine to be smoother.

The invention relates to triazine-containing benzoxazine, a triazine-containing benzoxazine polymer, and a preparation method thereof. The preparation method is characterized by: adopting cyanophenol as a raw material; adopting trifluoromethanesulfonic acid or trifluoroacetic acid as a catalyst; synthesizing triazine-containing trihydric phenol (TP for short) in dichloromethane or chloroform or acetone at a common temperature; adopting the synthesized TP, formaldehyde and aminated compounds as reaction raw materials; adopting a alkali as the catalyst, and carrying out a reaction in a alcohol solvent or a ether solvent to synthesize a series of triazine-containing polycyclic benzoxazine monomers (BZ for short) which have not been reported; heating the BZ to carry out a ring-opening polymerization to form polybenzoxazine (PBZ for short). A structural formula of the monomer BZ is shown as follow, substituents R are shown in the specification. The synthesized novel monomer provided by the present invention contains a triazine ring structure, such that the triazine content in the PBZ resin can be substantially raised so as to notably improve heat resistance, residual carbon rate, fire resistance property and wave transmission property of the PBZ.

The invention discloses a plating solution for high-speed electrotinning. The plating solution includes the following components: 5-100 g/L tin methanesulfonate, 10-100 ml/L methanesulfonic acid, 0.1-20 ml/L sulfuric acid, 0.1-200 mg/L defoaming agent, 0.1-50 g/L fine grained agent, 0.01-20 g/L change agent and 0.1-40 g/L antioxidant. The plating solution disclosed by the invention has excellent dispersion and deep plating capacity, can meet various technical requirements of a high-speed electrotinning production line, and meanwhile can further reduce the tinning amount (about 0.7 g/m<2>) to save resources, in addition, the highest tolerance limit contents of iron ions and chloride ions of the plating solution are respectively 20 g/L and 1000 ppm. The plating solution disclosed by the invention is more stable than a plating solution without fine grained agent, and after the plating solution is used or placed for several weeks, a good clad layer can still be obtained.

The invention provides a preparation method of trifluoro methanesulfonic anhydride. The method comprises the following steps of: firstly reacting trifluoro methanesulphonyl fluoride with alkali metal hydroxide to prepare trifluoro mesylate, purifying trifluoro mesylate by recrystallization by utilizing an organic solvent, reacting trifluoro methane sulfonyl chloride with trifluoro mesylate to generate a trifluoro methanesulfonic anhydride crude product, and finally purifying trifluoro methanesulfonic anhydride by atmospheric distillation. The preparation method of trifluoro methanesulfonic anhydride can be used for not only effectively simplifying reaction steps so that the operation process is simple and convenient and the operation is safe, but also avoiding byproducts generated in the process of the traditional method for producing trifluoro methanesulfonic anhydride, and effectively reducing the contents of F<-> and SO4<2-> in the product; by utilizing recrystallization, atmospheric distillation and other methods for purification, the product purity is up to 99.5%; and more importantly, the yield of anhydride is greatly increased and raised to 88% from original 60%.