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| Number | Title | Issue Date |
| 8158816 | Process for lightening the color of polyol esters The present invention relates to a process for lightening the color of polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, wherein the reaction product is worked up without using adsorbents and compri... | 04/17/2012 |
| 8148570 | Process for preparing vinyl acetate with utilization of the heat of reaction Vinyl acetate is prepared by a) continuous gas-phase reaction of ethylene, acetic acid and oxygen at 1 to 30 bar and 130° C. to 200° C., the process heat being removed by heat exchange with water at 120° C. to 185° C. and 1 to 10 bar, b... | 04/03/2012 |
| 7803965 | Method for recovery of ethylene in a recirculating gas process for the production of vinyl acetate The efficiency of vinyl acetate production is increased by scrubbing of off gas followed by CO2 absorption. A portion of the off gas containing substantial quantities of ethylene is recycled to the process, whereas another portion is employed in another e... | 09/28/2010 |
| 7576236 | Utilization of acetic acid reaction heat in other process plants Integrated processes and systems for producing acetic acid and vinyl acetate are provided. In the processes and systems, a portion of the heat produced during the production of the acetic acid is transferred to the vinyl acetate production and/or purification proces... | 08/18/2009 |
| 7465823 | Utilization of acetic acid reaction heat in other process plants Integrated processes and systems for producing acetic acid and vinyl acetate are provided. In the processes and systems, a portion of the heat produced during the production of the acetic acid is transferred to the vinyl acetate production and/or purification proces... | 12/16/2008 |
| 7390919 | Methyl acetate purification and carbonylation Disclosed is a method for removing aldehyde impurities from a methyl acetate supply. The method comprises reacting the methyl acetate supply with a polyol and converting the aldehyde impurities to cyclic acetals. The acetals are subsequently removed from the methyl ... | 06/24/2008 |
| 7390918 | Integrated process for the manufacture of alkenyl carboxylates An integrated process for the production of an alkenyl carboxylate, such as vinyl acetate which process comprises the steps of (a) contacting in an oxidation reaction zone a C2 to C4 alkane, such as ethane, a molecular oxygen-containing gas, op... | 06/24/2008 |
| 7371890 | Method for the continuous production of a compound that carries at least two functional groups A process for continuously preparing a compound which bears at least two functional groups which are each independently selected from the group consisting of nitrile group, carboxylic acid group, carboxylic ester group and carboxamide group. ... | 05/13/2008 |
| 7355066 | Process for making terpene esters A process for making terpene esters is disclosed. Reaction of a terpene alcohol with acetic anhydride in the presence of a high-boiling amine provides a terpene ester. Acetic acid, which is distilled from the reaction mixture as it forms can be recovered. The terpen... | 04/08/2008 |
| 7342142 | Hydrogenation of polytrimethylene ether glycol A process comprising contacting PO3G having color with hydrogen in the presence of a hydrogenation catalyst, wherein the PO3G, after hydrogenation, has a APHA color of less than about 50. ... | 03/11/2008 |
| 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 |
| 7301048 | Process for isolating vinyl acetate A process for isolating vinyl acetate from the gas mixture formed in the reaction of ethylene with acetic acid and oxygen in the gas phase over catalysts comprising palladium or palladium compounds, with recirculation of the acetic-acid solution obtained in the circ... | 11/27/2007 |
| 7276639 | Process and apparatus for detecting a loss of reaction in a hydrocarbon conversion reaction A hydrocarbon conversion process such as an auto-thermal cracking process in which a hydrocarbon feed and a molecular oxygen-containing gas are contacted in a reaction zone in the presence of a catalyst to produce an outlet stream having an oxygen concentration whic... | 10/02/2007 |
| 7208625 | Removing permanganate-reducing impurities from acetic acid A method for removing permanganate-reducing impurities from an acetic acid product is disclosed. The method comprises contacting an acetic acid product containing permanganate-reducing impurities with peracetic acid and an oxygen-containing gas. The method is partic... | 04/24/2007 |
| 7182839 | Preventing deposition of fouling agents onto equipment Methods and compositions effective to prevent deposition of fouling agents, preferably polymerization precursors, on handling equipment, particularly during solvent recovery. ... | 02/27/2007 |
| 7160524 | Process and apparatus for the production of butylacetate and isobutylacetate The invention relates to an apparatus for the production of butylacetate by esterification of acetic acid with butanol in the presence of a solid acidic catalyst in which distillatory separation of components runs simultaneously with esterification. Thus, acetic aci... | 01/09/2007 |
| 7115772 | Integrated process for producing carbonylation acetic acid, acetic anhydride, or coproduction of each from a methyl acetate by-product stream The present invention is directed to using methyl acetate from a vinyl acetate-based or a vinyl-or ethylene-alcohol based polymer or copolymer process directly for use in a methanol carbonylation production process to produce acetic acid, acetic anhydride, or a copr... | 10/03/2006 |
| 7115773 | Coupled production of two esters The invention relates to a method for the coupled production of two esters by reacting a mixture of aliphatic alcohols with an aliphatic carboxylic acid and then treating the resulting mixture by distillation. During the distillation process, a side flow that is tak... | 10/03/2006 |
| 7001919 | Forms of pravastatin sodium New polymorphic forms of pravastatin sodium are provided. Each of the new forms is selectively obtained by crystallization from different solvent systems, each solvent system having a protic component, and by controlling the rate of crystallization through temperatu... | 02/21/2006 |
| 6992213 | Method for removing trifluoroethanol from liquids Trifluoroethanol can be isolated from organic liquids that are contaminated by trifluoroethanol by bringing the contaminated liquid into contact with a molecular sieve having a pore size ranging between 0.5 and 1.0 nm, e.g., with molecular sieve 13X. This enables, f... | 01/31/2006 |
| 6946505 | Cement dispersant, its production process, and cement composition using the cement dispersant Disclosed are the following: a cement dispersant which is excellent in initial dispersibility and further in flow retainability of cement, because of using a polymer having a proper molecular weight distribution; a process for producing this cement dispersant; and a... | 09/20/2005 |
| 6946570 | Ester synthesis This invention relates to a process for the production of lower aliphatic esters by reacting a lower olefin with a saturated lower aliphatic mono-carboxylic acid in the vapor phase in the presence of a heteropolyacid catalyst in a plurality of reactors set up in ser... | 09/20/2005 |
| 6838566 | Salts of HMG-CoA reductase inhibitors Lovastatin, pravastatin, simvastatin, mevastatin, atorvastatin, and derivatives and analogs thereof are known as HMG-CoA reductase inhibitors and are used as antihypercholesterolemic agents. The majority of them are produced by fermentation using microorganisms of d... | 01/04/2005 |
| 6794535 | Ester synthesis Process for the production of lower aliphatic esters comprising reacting a lower olefin with a saturated lower aliphatic monocarboxylic acid in the vapor phase in the presence of a heteropolyacid catalyst. The reaction is carried out in a plurality of reactors set u... | 09/21/2004 |
| 6765110 | Process for the simultaneous coproduction and purification of ethyl acetate and isopropyl acetate This invention relates to a process for the simultaneous coproduction of ethyl acetate and isopropyl acetate. The esterification reaction comprises contacting acetic acid with a mixed alcohol stream of ethanol and isopropanol. Exemplified is a purified, Fischer Trop... | 07/20/2004 |
| 6710204 | Decreasing method of N-oxyl compound There is provided a superior decreasing method of an N-oxyl compound contained in an easily polymerizable material, according to which the N-oxyl compound contained in an easily polymerizable material can be sufficiently decreased and loss of the easily polymerizabl... | 03/23/2004 |
| 6663692 | Process for purifying carbon dioxide-containing gas streams A process for removing at least one compound selected from acetic acid, acetate esters and aldehydes from a gaseous fraction comprising carbon dioxide and such a compound. The process includes the steps of (a) scrubbing in a scrubber at least part of the ... | 12/16/2003 |
| 6635775 | Reduced odor esters and process for producing same An improved process for preparing reduced-odor or odorless esters, preferably benzoate esters, octanoate esters, aliphatic emollient esters and glycol dibenzoate esters. The improved process comprises, in part, removing the esterification catalyst from th... | 10/21/2003 |
| 6632330 | Process for purification of alkyl alkanoate A process for the recovery of substantially pure alkyl alkanoate, such as ethyl acetate, from an impure feedstock. The impure feedstock is contacted with a selective hydrogenation catalyst in the presence of hydrogen in a selective hydrogenation zone main... | 10/14/2003 |
| 6632959 | Basic catalysts and process for producing carbonyl compound derivatives A base catalyst, obtained by formulating at least one alkali metal compound selected from the group consisting of alkoxides, hydroxides and oxides of alkali metals and an alkaline-earth metal oxide in a ratio of "the weight of alkaline metal compound/the ... | 10/14/2003 |
| 6586609 | Process for esterification in a chromatographic reactor Process for the esterification of organic acids with alcohols in a reactor of the chromatographic type in which the heterogeneous solid phase is capable of acting both as an esterification catalyst and as a means exhibiting preferential adsorption towards... | 07/01/2003 |
| 6583295 | Salts of HMG-CoA reductase inhibitors Lovastatin, pravastatin, simvastatin, mevastatin, atorvastatin, and derivatives and analogs thereof are known as HMG-CoA reductase inhibitors and are used as antihypercholesterolemic agents. The majority of them are produced by fermentation using microorg... | 06/24/2003 |
| 6538164 | Recovery process for volatile compounds from solids in aqueous solution Volatile compounds may be economically recovered from solids present in aqueous solution by subjecting the solution to rapid separation where the volatilization occurs in a flash, spray, or fluid bed, or mechanically agitated dryers. Rapidly separating th... | 03/25/2003 |
| 6458992 | Process and apparatus for the production of butylacetate and isobutylacetate The invention relates to a process of butylacetate production by esterification of acetic acid with butanol in the presence of a solid acidic catalyst in which distillatory separation of components runs simultaneously with esterification. Thus, acetic aci... | 10/01/2002 |
| 6399812 | Production of aliphatic esters Aliphatic esters, R'COOR are produced by reacting the corresponding alcohol, ROH having carbon numbers of the alkyl groups, R' and R, between 0 and 9 and 1 and 10, respectively, with molecular oxygen in the presence of a dual functional catalyst comprisin... | 06/04/2002 |
| 6383343 | Separation of components from methanol mixtures by extractive distillation A method of separating methanol and acetone, and methanol and methyl acetate involves distilling a mixture of the components by an extractive distillation process in the presence of an extractive distillation solvent. The extractive distillation solvent m... | 05/07/2002 |
| 6375807 | Separation of ethanol mixtures by extractive distillation A method of separating ethanol and ethyl acetate, and ethanol and water involves distilling a mixture of the components by an extractive distillation process in the presence of an extractive distillation solvent. The extractive distillation solvent may be... | 04/23/2002 |
| 6375804 | Tertiary butyl acetate recovery The present invention provides a distillation separation method whereby tertiary butyl acetate is separated by distillation as an overhead stream from a bottoms acetic acid stream with the proviso that water is incorporated in the system such that the bot... | 04/23/2002 |
| 6258978 | Controlling product stream oxygen content in process for the production of vinyl acetate In a process for the production of vinyl acetate by reacting ethylene, acetic acid and an oxygen-containing gas in a reactor to produce a process stream which is removed from the reactor as an outlet stream, the process is improved by maintaining the oxyg... | 07/10/2001 |
| 6232491 | Purification process for removal of impurities in acetic acid-ethylene reactions This invention is a process for the removal of acetaldehyde impurities from ethyl acetate formed by reacting acetic acid with ethylene over a catalyst by refining a crude mixture of ethyl acetate, diethyl ether, acetaldehye and water in a column (C) so as... | 05/15/2001 |
