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| Number | Title | Issue Date |
| 7332092 | Method of separating E and Z isomers of an alkene alcohol and derivatives thereof E and Z isomers of alkene alcohols and/or alkene alcohol derivatives are separated by substantially continuously contacting an ion exchange medium which is ion exchanged with silver and/or copper ions with the feed stream comprising the E and Z isomers of at least o... | 02/19/2008 |
| 7208640 | Process for isolating highly pure 2-methoxypropene A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, addin... | 04/24/2007 |
| 6566559 | Process for the production of isopropenyl methyl ether Process for the production of unsaturated ethers, in particular isopropenyl methyl ether (IPM), by pyrolysis of a ketal-containing or acetal-containing mixture, in particular dimethoxypropane (DMP), in the liquid phase in the presence of an organic carbox... | 05/20/2003 |
| 6469219 | Production of fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether An improved process for preparing fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether(sevoflurane) by reacting 1,1,1,3,3,3-hexafluoro-2-propanol with formaldahyde and hydrogen fluoride either A) under distillation conditions or B) in the presence ... | 10/22/2002 |
| 6103939 | Process for the preparation of 1,4-butanediol monoethers A process for preparing tetrahydrofuran, which comprises reacting 1,4-butenediol diethers of the formulae I and/or II RO--CH2 --CH.dbd.CH--CH2 --OR I RO--CH2 --CH2 .dbd.CH--CH2 --OR ... | 08/15/2000 |
| 5951829 | Separation of heteropoly compounds from polyethers, polyesters and polyether esters A method of separating heteropoly compounds from mixtures of polyethers, polyesters and/or polyether esters, a protic component and heteropoly compounds, wherein the protic component is removed from the mixture and subsequently separating off the heteropo... | 09/14/1999 |
| 5683555 | Working up reaction mixtures obtained in addition reactions with acetylene or propyne Reaction mixtures obtained in addition reactions of OH-- or NH-- carrying compounds with acetylene or propyne in the presence of alkali metal alcoholates or alkali metal amides are worked up by distilling off the vaporizable components from the reaction m... | 11/04/1997 |
| 5124005 | Separation of methylene chloride from ethyl vinyl ether by extractive distillation Methylene chloride cannot be completely separated from ethyl vinyl ether by conventional distillation or rectification because of the minimum boiling azeotrope. Methylene chloride can be readily separated from ethyl vinyl ether by extractive distillation.... | 06/23/1992 |
| 5013444 | Process for separating off enol ethers from reaction mixtures containing alcohols The invention relates to a gentle process for the separation of enol ethers from mixtures containing water-soluble alcohols by extraction, wherein an aqueous solution of a base is used as the extraction agent in a phase ratio of the amounts of the aqueous... | 05/07/1991 |
| 4518805 | Process for removing hydroperoxides and aldehydes from allyl-alkyl ether Described herein is a process for the conversion of hydroperoxides, present in allyl-alkyl ethers to products including ,ଲ-unsaturated aldehydes and for reducing such ,ଲ-unsaturated aldehydes to alcohols prior to the use of the e... | 05/21/1985 |
| 4170601 | Method for isolating insect sex pheromones The isomers of synthetic insect sex pheromones or their precursors are separated by selectively forming an inclusion complex with the E-isomer and urea or thiourea. In order for the E-isomer complex to form selectively it is necessry that the mono-olefin ... | 10/09/1979 |
