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7358030 |
Process for producing ether compound
The present invention provides the following process for production of an ether compound, which is useful for chemical amplification type resist compositions, synthetic intermediates of...
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7276573 |
Method for producing monoesters and diesters of polytetrahydrofuran and of tetrahydrofuran copolymers
The present invention provides a process for preparing mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of at least one...
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7230147 |
Process for functionalizing a double bond
The invention concerns a method for functionalizing a double bond and, more particularly, a double bond bearing a metalloid atom. Said functionalization is produced by the action of perhalogenated...
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7005537 |
Production of esters
Disclosed is a process for the production of esters. In particular, the process includes contacting an olefin or an ether with carbon monoxide and an acid composition comprising BF 3 .2CH 3 OH to...
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6958413 |
Method of reaction with soluble metallic catalyst and anion-exchange resin, method of recovering the soluble metallic catalyst, and method of reuse
The invention provides a method of liquid-phase reaction using a soluble metallic catalyst in which the soluble metallic catalyst is caused to coexist with an anion-exchange resin during the...
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6800780 |
Method for producing carboxylic acid benzyl esters
Disclosed herein is a process for the preparation of carboxylic acid benzyl esters from dibenzyl ethers, comprising reacting dibenzyl ethers with carboxylic acids in the presence of a homogeneous...
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6765116 |
Process of preparing a fluid rare earth alkoxylation catalyst
A process to prepare an improved fluid rare earth phosphate catalyst composition useful in preparing alkylene oxide adducts of organic compounds having active hydrogen atoms is provided. The...
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6723872 |
Production process for hydroxyalkyl ester
The present invention provides: a process in which, when a hydroxyalkyl ester is produced by carrying out a reaction between a carboxylic acid and an alkylene oxide in the presence of a catalyst,...
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6646145 |
Processes for preparing alkoxylated nonionic surfactants using hydrotalcite catalysts
Processes for preparing alkoxylated nonionic surfactants are disclosed, wherein a compound having at least one active hydrogen atom, a carboxylic acid ester or mixtures thereof are reacted with an...
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6593491 |
Production of tertiary butyl acetate
Disclosed is a process for the production of t-butyl acetate and coproduction of methyl acetate or ethyl acetate, directly from MTBE or ETBE, by contacting a mixture of acetic acid, acetic...
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6559278 |
Method for producing tetrahydrofuran polymers
The invention relates to a method for continuously or discontinuously producing tetrahydrofuran polymers by homopolymerization of tetrahydrofuran, alkyl-substituted tetrahydrofurans and/or alkylene...
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6555703 |
Process for the preparation of carboxylic acid benzyl esters
The invention relates to a process for forming a carboxylic benzyl ester comprising reacting a dibenzyl ether with a carboxylic acid in the presence of a heteropolyacid and forming a carboxylic...
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6465682 |
Production process for hydroxyalkyl ester
In a production process for a hydroxyalkyl ester, comprising the step of carrying out a reaction between a carboxylic acid and an alkylene in the presence of a catalyst, the present invention is to...
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6403842 |
Processes for producing poly(alkylene ether) glycol
Disclosed are a process for producing a poly(alkylene ether) glycol which comprises polymerizing a cyclic ether in the presence of at least a catalyst and a carboxylic acid anhydride, wherein the...
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6362312 |
Catalyst and method for the production of polytetrahydrofuran
In a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters thereof comprises polymerizing tetrahydrofuran in the presence of at least one telogen...
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6348623 |
Polymers of 3-butene esters, their preparation and use
The specification describes various polymers having monomer of formula (I): In formula (I), R1 and R2 are, independently, hydrogen, a C 1 -C 24 alkyl group, an aromatic or heteroaromatic group,...
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6274700 |
Catalyst and method for producing polytetrahydrofuran
In a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters thereof by polymerization of tetrahydrofuran in the presence of at least one telogen and/or...
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6211401 |
Process for preparing polytetrahydrofuran
Polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer on a...
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6130346 |
Process for preparing an organic compound from an oxirane-containing compound in the presence of a tris(triaminophosphoranylideneamino)phosphine oxide
A process for preparing an organic compound, comprising conducting an organic reaction in the presence of a phosphine oxide represented by formula (1); ##STR1## where R 1 is the same or different...
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6111147 |
Process for preparing polytetrahydrofuran and derivatives thereof
Polytetrahydrofuran, copolymers of tetrahydrofuran and 2-butyne-1,4-diol, diesters of these polymers with C 2 -C 20 -monocarboxylic acids or monoesters of these polymers with C 1 -C 10 ...
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6069226 |
Process for the preparation of polytetramethylene ether glycol diester using an aluminosilicate type catalyst
Polytetramethylene ether glycol diester of the formula ##STR1## wherein R and R 1 are identical or different and are alkyl radicals having 1-4 carbon atoms, and n is an integer from 2 to 200, are...
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5962727 |
Method for manufacturing diacetate esters of polytetramethylene ethers
An improved method for manufacturing diesters of polytetramethylene ethers involving the polymerization of tetrahydrofuran (THF) optionally with one or more comonomers (e.g., 3-methyl THF, ethylene...
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5952458 |
Process for preparing a vinyl terminated polymer
Synthesis of a vinyl terminated polymer by reacting a cationically polymerizable monomer in the form of a cyclic ether with an acid chloride in a suitable solvent and in the presence of a Lewis...
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5907054 |
Process for the polymerization of cyclic ether
The present invention provides a process for the production of an ester of polyoxyalkylene glycol on an industrially favorable basis which comprises the ring opening polymerization of a cyclic...
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5886138 |
Process for the preparation of tetrahydrofuran polymers
A process for the continuous and discontinuous production of tetrahydrofuran polymers by homopolymerizing tetrahydrofuran or copolymerizing tetrahydrofuran with 1,2-alkylene oxides in the presence...
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5852208 |
Method of producing compounds containing acyloxyalkoxy groups from alcohols
A process of producing compounds containing an acyloxyalkoxy group from an alcohol consists of reacting the alcohol with a formaldehyde donor until a compound of the formula: R--O--CH 2 (OCH 2 )...
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5773648 |
Preparation of polytetrahydrofuran
A process for the preparation of polytetrahydrofuran or polytetrahydrofuran monoesters of C 1 -C 10 monocarboxylic acids by the polymerization of tetrahydrofuran over a heterogeneous catalyst in...
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5684179 |
Method for recovering diacetate esters of polytetramethylene ethers
An improved method for recovering purified diesters of polytetramethylene ethers involving the polymerization of tetrahydrofuran (THF) optionally with one or more comonomers (e.g., 3-methyl THF,...
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5663422 |
Process for the production of 1,2-diacetoxy esters
A process for the preparation of a 1,2-diacetoxy ester comprises acetylation of an epoxide with an acetic anhydride in the presence of a quaternary phosphonium acetate catalyst or its complex with...
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5659073 |
Process for making glycol ether acetates
Disclosed is a method of making a glycol ether acetate. Acetic acid is reacted with a glycol ether at a molar ratio of about 1.1 to about 2, in a mixture with a catalyst and an azeotropic agent...
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5659068 |
Preparation of polyoxyalkylene glycol monoesters of monocarboxylic acids
Polyoxyalkylene glycol monoesters of carboxylic acids are prepared by a process in which tetrahydrofuran or a mixture of tetrahydrofuran with a total of not more than 95 mol %, based on the amount...
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5648558 |
Method for producing a polyoxyalkylene glycol and novel metallo-aluminosilicate
A method for producing a polyoxyalkylene glycol by ring opening polymerization of a cyclic ether, wherein a zeolite (other than ZSM-5, ZSM-11 and Nu-5) is used as a catalyst.
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5641857 |
Preparation of polytetrahydrofuran
Polytetrahydrofuran or polytetrahydrofuran monoesters of C 1 -C 20 -monocarboxylic acids or polytetrahydrofuran monoethers of monohydric C 1 -C 20 -alcohols, having an average molecular weight...
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5623086 |
Process for the production of 1,2-bis (acyloxylates)
A process for the preparation of 1,2-bis(acyloxyates) comprises acylation of epoxides with carboxylic anhydrides in the presence of a catalytic composition containing a tertiary amine and a...
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5463020 |
Preparation of polytetrahydrofuran or tetrahydrofuran/alkylene oxide copolymers
Polytetrahydrofuran or C 2 -C 10 -alkylene oxide/tetrahydrofuran copolymers having a molecular weight of from 250 to 20,000 Dalton are prepared by the cationic polymerization of tetrahydrofuran...
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5416240 |
Preparation of poloxy-alkylene glycols
Polyoxyalkylene glycols are prepared by a process in which tetrahydrofuran is polymerized with a total of not more than 95 mol %, based on the amount of tetrahydrofuran used, of one or more...
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5371276 |
Ring-opening polymerization of cyclic ethers
A method for preparing ester end-capped polyalkylene ether is disclosed. Cyclic ether monomers are subjected to ring-opening polymerzation at a temperature of 20°-80° C. and a pressure of 0-10...
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5344964 |
Method for preparing ester end-capped polyalkylene ether
A method for preparing ester end-capped polyalkylene ether is disclosed. Cyclic ether monomers are subjected to ring-opening polymerization at a temperature of 10°-80° C. and a pressure of 0-10...
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5298650 |
Process for producing organic esters by reacting a carboxylic acid and a dialkyl ether
The present invention is a process for producing organic esters wherein a dialkyl ether and a carboxylic acid are reacted in the presence of a solid phase acidic catalyst having an acidity factor...
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5262562 |
Polyether glycol production by polymerization of tetrahydrofuran
A method is disclosed wherein tetrahydrofuran is reacted in the presence of acetic anhydride and a catalyst to provide acetate derivatives of polyglycols and using as a catalyst a triflic...
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5254723 |
Preparation of glycol diesters from polyethers
A process for making glycol diesters from polyethers is disclosed. The polyether is reacted with an acyclic, aliphatic anhydride in the presence of a Lewis acid to produce the glycol diester. The...
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5225590 |
Alkoxy methyl ether and alkoxy methyl ester derivatives
Intermediates and methods for producing intermediates for use in preparing 9-(1,3-dihydroxy-2-propoxymethyl)-guanine and esters and ethers thereof.
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5218141 |
Preparation of polyoxybutylele polyoxyalkylene glycol dicarboxylates
Polyoxybutylene polyoxyalkylene glycol dicarboxylates are prepared by a process in which tetrahydrofuran is copolymerized with a molar excess of a 1,2-alkylene oxide in the presence of a carboxylic...
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5210325 |
Alkoxylation process catalyzed by supported rare earth elements
Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal...
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5210283 |
Synthesis of tetrahydrofuran polymers using calcined silica-alumina or beaching earth catalysts
Tetrahydrofuran is polymerized in the presence of a carboxylic acid anhydride and a solid acid catalyst that has been calcined at a temperature greater than about 600° C. Calcined bleaching earth...
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5208385 |
Preparation of tetrahydrofuran polymers having a narrow molecular weight distribution using an amorphous silica-alumina catalyst
A process for producing tetrahydrofuran polymers having a narrow molecular weight distribution is disclosed. Tetrahydrofuran is polymerized in the presence of a carboxylic acid anhydride and...
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5202463 |
Process for the preparation of a glycol ether ester
An improved process for preparing and purifying glycol ether esters is disclosed. An azeotroping agent is included at a sufficiently low level to allow removal of the water of reaction, but also...
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5189199 |
Process for the preparation of 1,4-disubstituted 2-butenes
A process is disclosed for the preparation of 1,4-dioxy-2-butenes by reacting 3,4-epoxy-1-butene with an oxygen nucleophile in the presence of a Pd(O) complex catalyst.
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5180847 |
Processes for preparing 2,2,4-trimethyl-1,3-pentanediol derivatives
A preferred process for producing 3-hydroxy-2,2,4-trimethylpentyl isobutyrate is described. The spent aqueous phase from an alkali metal hydroxide-catalyzed isobutyraldehyde condensation is...
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5162589 |
Alkoxylation process catalyzed by sodium- or potassium barium phosphate
Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal...
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