Patents
Patents for C07C 41 - Preparation of ethers; Preparation of compounds having groups, groups or groups (17,242)
11/1994
11/08/1994US5362377 Conversion of olefins by catalytic distillation
11/07/1994CA2114607A1 One-step synthesis of ethyl t-butyl ether from t-butanol using .beta. -zeolite_and multimetal-modified .beta.-zeolite catalysts
11/02/1994EP0523089B1 Use of hydrophobised hydrotalcites as catalysts for ethoxylation or propoxylation
11/01/1994US5360937 Halogenation and distillation to form squaric acids
10/1994
10/27/1994WO1994024081A1 Formylation process for aromatic aldehydes
10/26/1994CN1094026A Ether Recovery
10/25/1994CA1332768C Fluorinated polymers and copolymers containing perfluoropolyethereal blocks
10/20/1994DE4312037A1 Process for cleaving polycarbonates
10/13/1994WO1994022799A1 Process for clarifying alkoxylated alcohols
10/12/1994EP0618889A1 Tri-substituted phenyl derivatives and processes for their preparation
10/12/1994EP0618841A1 Method of producing alkaline-earth phosphates containing hydrophobic groups
10/12/1994CN1093353A Process for producing dimethyl ether
10/11/1994US5354922 Perfluoropolyoxyalkylene endowed with a high viscosity and a low peroxide oxygen content, and process for preparing them
10/11/1994US5354912 Method for the removal of dimethyl ether from methyl tertiary butyl ether
10/11/1994US5354911 From diacetals; catalyst composed of acid and amine
10/11/1994US5354901 Perfluoro(cycloaliphatic methyleneoxyalkylene) carbonyl fluorides and derivatives thereof
10/04/1994US5352848 Nitrile removal in an etherification process
10/04/1994US5352847 Etherification; reacting with methanol
10/04/1994US5352846 Hydrogenating and isomerizing isopentenes, etherifying, distilling
10/04/1994US5352844 Isolation of partially brominated diphenyl ether mixtures in crystalline form with higher melting range
10/04/1994US5352843 Reacting B-naphthol with alkali or alkaline earth carbonate and benzyl chloride in the absence of water in water miscible solvent
10/04/1994US5352842 Heating oxylated alcohol product produced using calcium based catalyst, passing through filter medium under controlled temperature until desired clarification is obtained, cooling, regeneration of filter medium
09/1994
09/29/1994WO1994021722A1 Stabilized polyether polyol and polyurethane foam obtained therefrom
09/29/1994WO1994021582A1 Process for preparing diglycerine
09/29/1994DE4309426A1 Hydrogenolytic reduction of peroxidic ozonolysis products
09/29/1994CA2158176A1 Stabilized polyether polyol and polyurethane foam obtained therefrom
09/28/1994EP0616994A2 Process for producing ether alcohols by hydrogenolysis of cyclic ketal
09/28/1994CN1092760A Process for producing dimethyl ether from semi-water gas or water gas
09/27/1994US5350497 Fluorination of corresponding chlorine compound with elemental fluorine
09/27/1994CA1332200C Non-linear optical active diols and polyurethanes prepared therefrom
09/20/1994US5349110 Synthesis of low molecular weight glycol ethers from oxiranes plus olefins
09/20/1994US5349094 Process for the production of oligoglycerol mixtures of increased diglycerol content
09/20/1994US5348707 Multistage reactor for making ether from olefin and alcohol: first zone, with solid regenerable catalyst, operable for swing from product mode to regeneration mode in alternating sequence; second zone with, preferably, acid resin catalyst
09/20/1994US5348677 Electro-optical liquid crystal display element
09/20/1994US5348624 Process for separating ethyl tert-butyl ether and ethanol
09/16/1994CA2118828A1 Vapor phase chlorination of difluoromethyl methyl ether
09/15/1994WO1994020509A1 Triphenylbis (fluoroalkoxy) phosphoranes and fluorinated ketals
09/15/1994WO1994020455A1 Styryl derivatives, their preparation and use as pde-iv inhibitors
09/15/1994WO1994020446A1 Trisubstituted phenyl derivatives as phosphodiesterase inhibitors and processes for their preparation
09/15/1994CA2157362A1 Triphenylbis (fluoroalkoxy) phosphoranes and fluorinated ketals
09/14/1994EP0614869A1 Hydrogenolytic reduction of peroxidic ozonolysis compounds
09/14/1994EP0368946B1 1,2-dioxetanes
09/14/1994CN1092064A Tri-substituted phenyl derivatives and processes for their preparation
09/13/1994CA2118839A1 Hydrogenolytic reduction of peroxidic ozonolysis products
09/07/1994EP0613876A1 Preparation of isoflurane
09/07/1994EP0613875A1 Process for the telomerization of conjugated alkadienes
09/07/1994EP0613485A1 Thermoplastic fluorocopolymers, and method of preparing fluoromonomer for use in the manufacture of the fluorocopolymer
09/07/1994CN1091732A Process of refining diethyloxy methane and its product application
09/06/1994US5345021 Alkylation and dealkylation catalysts for aromatic hydrocarbon compounds
09/06/1994US5345006 Maintaining liquid level; hydrating isobutene with water to make tert-butyl alcohol
09/06/1994US5344998 From formaldehyde and hydrogen fluoride
09/06/1994US5344996 Catalyst removal from alcohol alkoxylates using acid clays
09/06/1994US5344580 Oligomers of fluorinated olefins
09/04/1994CA2116622A1 Process for the telomerization of conjugated dienes and suitable catalyst therefor
09/01/1994WO1994019404A1 Stabilized polyether polyol and polyurethane foam obtained therefrom
09/01/1994WO1994019391A1 Fluorinated polyethers and their preparation
09/01/1994WO1994019305A1 Di-isopropyl ether production
09/01/1994WO1994019304A1 Production of alkyl tertiary alkyl ethers
09/01/1994CA2156188A1 Di-isopropyl ether production
08/1994
08/31/1994EP0612309A1 Production of bis(fluoromethyl)ether and/or difluoromethane from formaldehyde and hydrogen fluoride.
08/30/1994US5342903 Process for the preparation of adducts of epoxides and alcohols
08/30/1994US5342541 Purified hydroxy-functional polyether compounds
08/24/1994EP0406415B1 Method of producing an alkylene oxide adduct
08/18/1994DE4404291A1 Process for the separation of a mixture of polyglycerols chromatographically
08/17/1994CN1025673C Alkoxylation process using calcium based catalysts
08/16/1994US5338890 One step
08/16/1994US5338889 Alkane rejection in C4 etherification and isomerization process
08/16/1994US5338888 Preparation of E,Z-butenedial bis(dialkyl acetals)
08/16/1994US5338518 Distillation-reaction apparatus and its use for carrying out balanced reaction
08/16/1994US5338478 Stabilized polyether polyol and polyurethane foam obtained therefrom
08/10/1994EP0609813A1 Integrated production of fuel gas and oxygenated organic compounds from synthesis gas
08/10/1994EP0609200A1 Direct fluorination process for making perfluorinated organic substances
08/10/1994EP0525038B1 Process for preparation of resorcinol bis(dihydroxyethyl)ether
08/04/1994WO1994017024A1 Process for producing diethoxymethane
08/04/1994WO1994017023A1 Fluorinated hydrocarbon compound, process for producing the same, and refrigerator oil and magnetic recording medium lubricant
07/1994
07/27/1994EP0608158A1 Process for producing dicyclopentenyloxyethanol
07/26/1994US5332790 Liquid-phase fluorination
07/26/1994US5332725 Perfumes of alkyl substituted oxotetralin or oxoindanes
07/26/1994CA1331014C Preparation of esterified propoxylated glycerin from free fatty acids
07/20/1994EP0606863A2 Process for the thermooxidative stabilization of glycol compounds and thermooxidative stabilized mixtures thereof
07/19/1994CA2113534A1 Installation and process for the reaction of two liquid reagents in presence of a solid catalyst
07/19/1994CA1330799C Corrosion-inhibiting compositions
07/19/1994CA1330797C Alkoxy methyl ether and alkoxy methyl ester derivatives
07/13/1994EP0606072A1 Selective catalytic hydrogenation of aromatic aldehydes
07/13/1994EP0606065A1 Method for the preparation of biphenyl derivatives
07/13/1994EP0605822A1 Integrated process for the production of methyl tert-butyl ether (mtbe)
07/13/1994EP0428706B1 Perfluorovinyl compounds
07/12/1994US5329051 Ether recovery
07/07/1994WO1994014800A1 Styril derivatives and processes for their preparation
07/07/1994WO1994014742A1 Tri-substituted phenyl derivatives as phosphodiesterase inhibitors
07/07/1994WO1994014740A1 Selective hydroxylation of phenol or phenolic ethers
07/07/1994CA2152086A1 Selective hydroxylation of phenol or phenolic ethers
07/07/1994CA2112795A1 Process for the preparation of biphenyl derivatives
07/07/1994CA2111018A1 Integrated mtbe process
07/06/1994EP0604998A2 Ether recovery
07/05/1994US5326891 Alkoxylation catalyst
06/1994
06/29/1994EP0604165A1 Production of alkyl tertiary-alkyl ether
06/28/1994US5324866 Hydration of propylene; etherification
06/28/1994US5324865 Di-isopropyl ether production
06/28/1994US5324864 From chlorodifluoromethane and sodium methoxide