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| Number | Title | Issue Date |
| 8088958 | Methods for recovery of alcohols from dilute aqueous alcohol feed streams Methods for recovery of at least one alcohol from dilute aqueous alcohol feed streams are described. The methods include steps of a) providing a source of a dilute aqueous alcohol feed stream including at least one alcohol; b) substantially removing any solids from ... | 01/03/2012 |
| 8053610 | Method for purifying fermentation alcohol The present invention relates to a method for purifying an aqueous solution of fermentation alcohol to give anhydrous alcohol, wherein a mash column is controlled such a manner that an alcohol concentration of an alcohol/water mixed vapor distilled from a mash colum... | 11/08/2011 |
| 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 |
| 7301055 | Process for removing methanol from formaldehyde-containing solutions Process for removing methanol from formaldehyde-containing solutions. The present invention relates to a process for removing methanol from formaldehyde-containing solutions, with methanol being converted into formaldehyde dimethyl acetal by reactive distillation in... | 11/27/2007 |
| 7211703 | 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... | 05/01/2007 |
| 7157610 | Process for recovering methanol A process for recovering methanol from mixtures containing methanol and water, comprising multistage evaporation with heat integration, wherein the pressure is reduced from each stage to the next, and a downstream series of distillation stages with heat integration,... | 01/02/2007 |
| 7141611 | High molecular weight primary aliphatic alcohols obtained from natural products and uses thereof This invention provides an isolated mixture of higher molecular weight primary aliphatic alcohols having 20, 22, 24, 26, 27, 28, 30, 32 and 34 carbon atoms and having enhanced purity. This invention also provides a process for obtaining the alcohol mixture by extrac... | 11/28/2006 |
| 7122709 | Method for obtaining ethanol A method for obtaining ethanol from a feed solution utilizes an extractant comprising a mixture of at least one alkane and at least one aliphatic alcohol having the formula wherein R1, R2, R... | 10/17/2006 |
| 7034060 | Polycosanols from wax The present invention provides a novel method for the preparation of a unique profile of primary aliphatic alcohols, having 24 to 30 carbon atoms, from the wax secreted by the insect Ericerus pela. Included in the present invention is the composition of matte... | 04/25/2006 |
| 7034193 | Method for purifying spent acid A method for purifying a spent acid catalyst from an acid catalyzed chemical reaction that generates a mixture of a product, spent add and tar, includes the steps of separating the mixture of product, spent acid, and tar into a product fraction and a spent acid frac... | 04/25/2006 |
| 7002045 | Ortho ester-based surfactant, its preparation and use The present invention relates to a new ortho ester-based surfactant, where the hydrophobic and hydrophilic parts are connected by ortho ester linkages to the molecule. The ortho ester has the formula where R is hydrogen... | 02/21/2006 |
| 6984666 | Polycosanols from wax The present invention provides a novel method for the preparation of a unique profile of primary aliphatic alcohols, having 24 to 30 carbon atoms, from the wax secreted by the insect Ericerus pela. Included in the present invention is the composition of matte... | 01/10/2006 |
| 6818799 | Process for removing tar from spent acid There is a process for removing by-product tar during the manufacture of isopropyl alcohol. The process comprises the following: a) reacting propylene with concentrated sulfuric acid and water to form isopropyl alcohol and a spent acid having a by-product tar; b) ca... | 11/16/2004 |
| 6770790 | Purification of tertiary butyl alcohol The invention is a method to purify tertiary butyl alcohol by contact with at least two solid adsorbents comprising aluminum oxide and a large pore zeolite such as zeolite X. The purification method successfully improves product quality and reduces the amount of imp... | 08/03/2004 |
| 6683116 | Polycosanols from Ericerus pela wax The present invention provides a novel method for the preparation of a unique profile of primary aliphatic alcohols, having 24 to 30 carbon atoms, from the wax secreted by the insect Ericerus pela. Included in the present invention is the composition of m... | 01/27/2004 |
| 6596776 | High molecular weight primary aliphatic alcohols obtained from natural products and uses thereof The present invention relates to a naturally obtained mixture of higher molecular weight primary aliphatic alcohols which contain 20 to 34 carbon atoms. This invention also relates to the process for obtaining the alcohol mixture by extraction and purific... | 07/22/2003 |
| 6572831 | Materials treatment A material contaminated with a solvent is treated with a hydrofluorocarbon to remove the contaminant. The hydrofluorocarbon can be tetrafluoroethane.... | 06/03/2003 |
| 6225354 | High molecular weight primary aliphatic alcohols obtained from beeswax and pharmaceutical use thereof The present invention relates to a naturally obtained mixture of higher molecular weight primary aliphatic alcohols which contain 24 to 34 carbon atoms. This invention also relates to the process for obtaining the alcohol mixture by extraction and purific... | 05/01/2001 |
| 5985100 | Process for separating butanol and dibutyl ether by means of dual-pressure distillation Butanol and dibutyl ether are separated from a mixture containing water, dibutyl ether and n-butanol, 2-butanol and/or isobutanol by a process in which a) the mixture is introduced into a first distillation column, essentially butanol is separated off at ... | 11/16/1999 |
| 5789629 | Separating 3-methyl-1-butanol from 1-pentanol using certain organic compounds as the agent in extractive distillation 3-Methyl-1-butanol is difficult to separate from 1-pentanol by conventional distillation or rectification because of the proximity of their boiling points. 2 Methyl-1-butanol can be easily separated from 1-pentanol by extractive distillation. Effective ag... | 08/04/1998 |
| 5645695 | Separation of 2-methyl-1-propanol from 2-methyl-1-butanol by azeotropic distillation 2-Methyl-1-propanol is difficult to separate from 2-methyl-1-butanol by conventional distillation or rectification because of the proximity of their boiling points. 2-Methyl-1-propanol can be readily separated from 2-methyl-1-butanol by azeotropic distill... | 07/08/1997 |
| 5585527 | Continuous distillation and membrane process A process for separating a first component of a process stream from a second component of a process stream in a single vessel has been developed. The separation process uses an apparatus having a distillation zone to separate a first component from a seco... | 12/17/1996 |
| 5559254 | Separation of a mixture of methanol and tetrahydrofuran into its constituents A process is disclosed for separating a mixture of methanol and tetrahydrofuran into its components. The separation is carried out in the liquid or gaseous phase through an organophilic membrane, for example, a plasma polymerization membrane.... | 09/24/1996 |
| 5543564 | Process for releasing acidic organic compounds from salts thereof by carbon dioxide This invention embodies a process for releasing acidic organic compounds in high yield and good purity from aqueous solutions of their salts which comprises converting the salts by carbon dioxide to their corresponding free acidic organic compounds and me... | 08/06/1996 |
| 5494556 | Method of and an apparatus for separating a liquid mixture A method of separating a liquid mixture wherein the liquid mixture is heated; the heated liquid mixture is supplied to a pervaporation membrane module to separate a permeable component of the liquid; a portion of non-permeated liquid is circulated through... | 02/27/1996 |
| 5430197 | Recovery of alcohol from hydrocarbon streams Excess alcohol, e.g. methanol contained in a C4 -C6 hydrocarbon stream is removed in process using less water and energy than a conventional water wash by subjecting the stream to a first single stage water wash with 2 to 10 wt % wat... | 07/04/1995 |
| 5417814 | Separation of 3-methyl-2-butanol from 2-pentanol by extractive distillation 3-Methyl-2-butanol is difficult to separate from 2-pentanol by conventional distillation or rectification because of the proximity of their boiling points. 3-Methyl-2-butanol can be readily separated from 2-pentanol by extractive distillation. Effective a... | 05/23/1995 |
| 5413717 | Method of recovering MTBE from wastewater Dialkyl ethers having 5 to 7 carbon atoms; e.g. MTBE, and alcohols having 1 to 4 carbon atoms are extracted from wastewater with contaminant-free gasoline. Wastewater saturated with contaminants is reduced to 200 ppm contaminants in the absence of strippi... | 05/09/1995 |
| 5401366 | Separation of 1-butanol from 2-pentanol by extractive distillation 1-Butanol is difficult to separate from 2-pentanol by conventional distillation or rectification because of the proximity of their boiling points. 1-Butanol can be readily separated from 2-pentanol by extractive distillation. Effective agents are ethyl be... | 03/28/1995 |
| 5360520 | Separation of 2-butanol from t-amyl alcohol by extractive distillation 2-Butanol is difficult to separate from t-amyl alcohol by conventional distillation or rectification because of the proximity of their boiling points. 2-Butanol can be readily separated from t-amyl alcohol by extractive distillation. Effective agents are ... | 11/01/1994 |
| 5358608 | Separation of 1-propanol from 2-butanol by extractive distillation 1-Propanol is difficult to separate from 2-butanol by conventional distillation or rectification because of the proximity of their boiling points. 1-Propanol can be readily separated from 2-butanol by extractive distillation. Effective agents are isobutyl... | 10/25/1994 |
| 5348624 | Process for separating ethyl tert-butyl ether and ethanol For separating ETBE and ethanol the following principal stages are employed: (1) Extraction of ethanol by water, the raffinate being ETBE saturated in water and the extract an ethanol/water mixture containing a small proportion of ETBE; (2) Concentration ... | 09/20/1994 |
| 5348625 | Separation of ethanol from isopropanol by extractive distillation Ethanol is difficult to separate from isopropanol by conventional distillation or rectification because of the proximity of their boiling points. Ethanol can be readily separated from isopropanol by extractive distillation. Effective agents are methyl cap... | 09/20/1994 |
| 5320715 | Separation of 1-pentanol from cyclopentanol by extractive distillation 1-Pentanol is difficult to separate from cyclopentanol by conventional distillation or rectification because of the closeness of their boiling points. 1-Pentanol can be readily separated from cyclopentanol by extractive distillation. Effective agents are ... | 06/14/1994 |
| 5292973 | Phosphine oxide removal from compounds formed by a Wittig reaction An improvement is proposed for the removal of the precipitates of a phosphine oxide compound as a by-product from a mixture thereof with an olefin compound obtained by the Wittig reaction for the preparation of the olefin compound from a phosphorane compo... | 03/08/1994 |
| 5284983 | Process for purifying aqueous crude ethanol solution Disclosed is a purification process for removing lipophilic impurities coined in an aqueous crude ethanol solution, in particular, for efficiently removing impurities consisting of C3 -C4 alcohols. The process involves (a) a first e... | 02/08/1994 |
| 5264085 | Method of separating components of phenols mixture by distillation A method of continuously distilling off the components of a mixture containing phenols, water and methanol using a single distillation column, wherein methanol is recovered from the top of the column, water containing phenols is dragged as a side stream f... | 11/23/1993 |
| 5262013 | Coolant recycling method and apparatus A coolant recycling apparatus has a boiler and condenser for distilling a glycol and water from a used coolant. The glycol and water are recombined in a mixing tank to form a mixture having a desired ratio of water to glycol, and an inhibitor is added to ... | 11/16/1993 |
| 5185481 | Method for the separation of impurities from crude ethanol aqueous solution The present invention is a method for the separation of impurities from a crude ethanol aqueous solution, comprising of; (i) extracting lipophilic impurities within the crude ethanol aqueous solution into an extracting solvent phase by treating the crude ... | 02/09/1993 |
| 5152876 | Separation of methylene chloride from the lower alcohols by extractive distillation Methylene chloride cannot be completely separated from methanol or ethanol by conventional distillation or rectification because of the mimimum boiling azeotrope. Methyelne chloride can be readily separated from methanol or ethanol by azeotropic or extrac... | 10/06/1992 |
