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| Number | Title | Issue Date |
| 8058479 | Method for purifying acetone A method for purifying a crude acetone raw material containing low molecular weight impurities using three columns in sequence is disclosed. The method comprises the steps of feeding the crude acetone raw material into a first column; adding an alkaline reagent and ... | 11/15/2011 |
| 7605291 | Method for the preparation of volatile Anesthetics The present invention is concerned with the automated control of the synthesis and purification of components useful in the synthesis and purification of volatile anesthetics. The invention is particularly useful in its application to the purification of acetone use... | 10/20/2009 |
| 7416645 | Continuous process for recovering acetone from a waste stream resulting from acetone purification The present invention provides a continuous process for recovering acetone from a waste stream from an acetone purification stage. The waste stream contains mesityl oxide and optionally acetone. The process for recovering acetone includes separating the waste stream... | 08/26/2008 |
| 7335347 | Methods for purifying radiolabelled compounds One aspect of the present invention relates to a method of purifying radiolabelled compounds comprising a) loading onto a fluorous polymer a radiolabelled compound precursor comprising a fluoroalkyl tin moiety; b) reacting the radiolabelled compound precursor with a... | 02/26/2008 |
| 7141701 | Decomposition of cumene hydroperoxide A process for decomposing a cumene oxidation product mixture containing cumene hydroperoxide (CHP) and dimethylphenolcarbinol (DMPC) to produce phenol and acetone. ... | 11/28/2006 |
| 7141700 | Decomposition of cumene hydroperoxide A process for the decomposition of a cumene oxidation product mixture to produce phenol and acetone with reduced by-product formation by introducing the cumene oxidation mixture into an inlet of a decomposing vessel containing indirect heat exchange surfaces wherein... | 11/28/2006 |
| 7002043 | Process for producing 1,1,1-trifluoroacetone The invention relates to a process for producing 1,1,1-trifluoroacetone, which is useful as an intermediate of pharmaceuticals and agricultural chemicals, or as a reagent for introducing fluorine-containing groups. This process includes the step of conducting a hydr... | 02/21/2006 |
| 6984761 | Co-production of phenol, acetone, α-methylstyrene and propylene oxide, and catalyst therefor A process is disclosed for producing α-methylstyrene, acetone, and phenol wherein the amount of α-methylstyrene produced may be controlled by selectively converting a portion of the cumene hydroperoxide to dimethyl phenyl carbinol, the hydrated form of α-methylst... | 01/10/2006 |
| 6933414 | Acetone process A process is provided for the production of acetone from formaldehyde and methyl chloride. In the process formaldehyde is reacted in the vapor phase with methyl chloride to produce acetone and hydrogen chloride. Acetaldehyde may be formed as an intermediate in the r... | 08/23/2005 |
| 6933413 | Processes for preparation of hexafluoroacetone and its hydrate The present invention provides a process for the preparation of hexafluoroacetone characterized by bringing hexafluoro-1,2-epoxypropane into contact with at least one catalyst selected from the group consisting of titanium oxide catalysts and fluorinated titanium ox... | 08/23/2005 |
| 6831160 | Method of affinity purifying proteins using modified bis-arsenical fluorescein The present invention features methods for purifying polypeptides of interest using a modified Fluorescein arsenical helix binder (FlAsH) compound immobilized on a solid support. An exemplary FlAsH target sequence motif is also presented. Examples of modification of... | 12/14/2004 |
| 6774266 | Process for producing 1,1,1-trifluoroacetone A process for producing 1,1,1-trifluoroacetone includes the step of conducting in a gas phase a hydrogenolysis of a tetrafluoroacetone, which is represented by the general formula [1], by a hydrogen gas in the presence of a catalyst containing a transition metal, | 08/10/2004 |
| 6657087 | Process and apparatus for the work-up by distillation of cleavage product mixtures produced in the cleavage of alkylaryl hydroperoxides The present invention claims a process and an apparatus for the work-up by distillation of cleavage product mixtures produced in the cleavage of alkylaryl hydroperoxides. Usually, in the work-up by distillation of cleavage product mixtures which are produ... | 12/02/2003 |
| 6548712 | Process for producing 1,1,1,5,5,5-hexafluoroacetylacetone The invention relates to a process for producing 1,1,1,5,5,5-hexafluoroacetylacetone. This process includes (a) hydrolyzing a metal complex of 1,1,1,5,5,5-hexafluoroacetylacetone into a 1,1,1,5,5,5-hexafluoroacetylacetone hydrate; and (b) dehydrating the ... | 04/15/2003 |
| 6541676 | Integrated palladium-based micromembranes for hydrogen separation and hydrogenation/dehydrogenation reactions The present invention relates to gas separation membranes including a metal-based layer having sub-micron scale thicknesses. The metal-based layer can be a palladium alloy supported by ceramic layers such as a silicon oxide layer and a silicon nitride lay... | 04/01/2003 |
| 6452056 | Process for the preparation of fluorobenzyl derivatives A fluorine-containing benzonitrile derivative (formula 1) is subjected to a reduction reaction to obtain a fluorine-containing benzylamine derivative (formula 2), and the amino group in said fluorine-containing benzylamine derivative is replaced with a hy... | 09/17/2002 |
| 6392101 | Process for purifying 1,1,1,5,5,5-hexafluoroacetylacetone The invention relates to a process for purifying a crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate containing an impurity. The process includes bringing the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate into contact with a poor solvent in which ... | 05/21/2002 |
| 6384286 | Process for purifying 1,1,1,5,5,5-hexafluoroacetylacetone The invention relates to a process for purifying a crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate containing an impurity. The process includes bringing the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate into contact with a poor solvent in which ... | 05/07/2002 |
| 6340777 | Method for purifying acetone A process is described for purifying acetone from a crude acetone-phenol mixture produced upon oxidizing cumene. In the process, an alkaline agent and an oxidizing agent are both added to the mixture to help remove aldehyde contaminants upon purification.... | 01/22/2002 |
| 6340776 | Process for producing 1,1,1-trifluoroacetone A process for producing 1,1,1-trifluoroacetone includes the step of conducting a hydrogenolysis of a halogenated trifluoroacetone, which is represented by the general formula (1), by a hydrogen gas in the presence of a catalyst containing a transition met... | 01/22/2002 |
| 6331654 | Method of production of product acetone of high stability to oxidation Disclosed is a method for the production of product acetone of higher oxidation stability where the product acetone is produced by a multi-step rectification process in the presence of alkali catalyst. The embodiments of the method of present invention ut... | 12/18/2001 |
| 6303826 | Method for purification of acetone A method for purification of acetone containing at least one oxidizable impurity. The method comprises the steps of: (a) contacting acetone containing at least one oxidizable impurity with a heterogeneous oxidation catalyst in the presence of oxygen for a... | 10/16/2001 |
| 6262312 | Process for producing 1,1,1-trifluoroacetone The invention relates to a process for producing 1,1,1-trifluoroacetone. This process includes reacting a halogenated acetone with a metal in the presence of a proton donor. This halogenated acetone is represented by the general formula (1): ##STR1##... | 07/17/2001 |
| 6177595 | Process of producing chlorofluoroacetones A process of producing chlorofluoroacetones represented by a general formula ##STR1## where X represents independently chlorine atom or fluorine atom. The production process comprises fluorinating in a liquid phase pentachloroacetone by hydrogen fluo... | 01/23/2001 |
| 5998671 | Fluorinated ketones and method for making same A method for the preparation of a fluorinated ketone of the formula: ##STR1## where R1 and R2 are independently fluorine, alkyl of from about 1 to about 8 carbon atoms, fluoroalkyl of from about 1 to about 8 carbon atoms, or ... | 12/07/1999 |
| 5905174 | Method for producing 3,3-dichloro-1,1,1-triflouroacetone The invention relates to a method for producing 3,3-dichloro-1,1,1-trifluoroacetone. This method includes a step of fluorinating pentachloroacetone by hydrogen fluoride in the presence of a fluorination catalyst. This fluorination may be conducted in a li... | 05/18/1999 |
| 5788818 | Process for the purification of acetone A process for the purification of raw acetone deriving from processes for the production of phenol acetone, impurity mainly due to cumene, water, aldehydes and methanol, the steps of: feeding the stream of raw acetone coming from the primary fractionation of ... | 08/04/1998 |
| 5762764 | Purification of acetone Close boiling hydrocarbon impurities are separated from acetone by extractive distillation using a C9 -C14 alkane and/or a C8 -C12 aromatic hydrocarbon extractive distillation solvent.... | 06/09/1998 |
| 5567853 | Purification of acetone Acetone produced during MTBE production and containing methanol, aldehydes and other organic impurities is contacted with a solution of basic material such as NaOH in lower glycol at conditions effective to polymerize aldehyde impurities, the polymerized ... | 10/22/1996 |
| 5504239 | Process for separating off alkanols from other organic compounds of higher carbon number A first alkanol having from 1 to 3 carbon atoms can be separated off from other organic compounds of higher carbon number from the group comprising other alcohols, polyalcohols, ethers, oxo compounds, esters of carboxylic acids and of carbonic acid, haloa... | 04/02/1996 |
| 5457239 | Process for formylation of aromatic compounds A process for the preparation of a formylated aromatic compound comprising contacting an aromatic compound with (i) a halogenated compound in the presence of a Lewis acid, and (ii) a base, is described. The subject process provides an efficient and effect... | 10/10/1995 |
| 5399776 | Purification of acetone The present invention includes a process for removing aldehydes from acetone having aldehyde impurities comprising contacting the acetone with a sufficient amount of at least one diamine compound to react with at least a portion of the aldehyde and heatin... | 03/21/1995 |
| 5262014 | Process for removing acetone from a mixture of acetone, methyl, acetate and methyl iodide A process for removing acetone from an acetone/methyl acetate/methyl iodide mixture utilizing extractive distillation with water being introduced to the distillation zone above the point of introduction of the mixture and acetic acid being introduced at o... | 11/16/1993 |
| 5244545 | Process for removing acetone from carbonylation processes Disclosed is an improved process for the removal of acetone from a production system wherein acetic anhydride is produced by contacting a mixture comprising methyl iodide and methyl acetate and/or dimethyl ether with carbon monoxide in the presence of a c... | 09/14/1993 |
| 5240566 | Separation process A process for separating acetone, dichloromethane and trifluoroacetic acid from a mixture of acetone, dichloromethane, and a trifluoroacetic acid/acetone azeotrope by (1) fractionally distilling the mixture of acetone, dichloromethane, and the trifluoroac... | 08/31/1993 |
| 5187131 | Method for regenerating particulate adsorbents Method and apparatus for in-situ regeneration of particulate adsorbent in a vessel including: heating the adsorbent, passing inert gas through heated absorbent to collect vaporized adsorbate, chilling the inert gas to condense adsorbate, thereafter loweri... | 02/16/1993 |
| 5057192 | Acetone removal from acetic anhydride production process Disclosed is an improved process for the removal of acetone from a production system wherein acetic anhydride is produced by contacting a mixture containing methyl iodide and methyl acetate and/or dimethyl ether with carbon monoxide in the presence of a c... | 10/15/1991 |
| 5008412 | Process for the production of oxides An improved process is provided for the production of oxides from alkanes by reaction with oxygen, air or a gas enriched in oxygen relative to an air in the presence of an oxidation catalyst. An alkane, e.g. propane, is converted to an alkene in a multist... | 04/16/1991 |
| 4990632 | Process for the production of oxides An improved process is provided for the production of oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, in the presence of an oxidation catalyst. An alkane, e.g. propane, is converted... | 02/05/1991 |
| 4931145 | Separation of benzene from acetone by azeotropic distillation Acetone cannot be easily separated from benzene in high purity by distillation because of the closeness of their vapor pressures. Acetone can be readily removed from benzene by azeotropic distillation using certain aromatic hydrocarbons. Typical effective... | 06/05/1990 |
