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| Number | Title | Issue Date |
| 7659430 | Method for separating hydrogen chloride and phosgene The invention relates to a process for separating hydrogen chloride and phosgene, which comprises bringing a mixture of hydrogen chloride and phosgene into contact with an ionic liquid in which at least part of the hydrogen chloride is dissolved in a step a) and the... | 02/09/2010 |
| 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 |
| 7314960 | Catalytic synthesis of oxygenate from alcohol The present invention discloses a method for catalytic synthesis of oxygenate from alcohol. At first, a feeding material comprising at least one alcohol is provided. Next, a copper-containing catalyst is provided and the catalyst further comprises at least one metal... | 01/01/2008 |
| 7304185 | Process for production of carbonyl compounds There is provided a process for the production of carbonyl compounds, characterized by reacting a diol represented by the formula (1); wherein R1, R2, R3 and R4 are the... | 12/04/2007 |
| 7176177 | Aromas and aroma compositions containing 4,8-dimethyl-3,7-nonadien-2-one, and a method for the production thereof 4,8-dimethyl-3,7-nonadien-2-one has aromatizing properties and increases the extendibility and intensity of the aroma when used in an aroma composition. ... | 02/13/2007 |
| 7166752 | Decomposition of cumene oxidation product A process for decomposing a cumene oxidation product mixture containing cumene hydroperoxide (CHP) and dimethylphenyl carbinol (DMPC) to produce phenol, acetone and alpha-methyl styrene (AMS) with enhanced safety of operation and reduced by-product formation which c... | 01/23/2007 |
| 7166753 | Process for production of hydrogen and carbonyl compounds by reacting sub- or super-critical water with alcohols A process for producing a carbonyl compound involves allowing water to undergo phase transition to a supercritical or subcritical state in the presence of an alcohol compound so as to produce/generate water-derived hydrogen and at the same time convert the alcohol c... | 01/23/2007 |
| 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 |
| 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 |
| 6780812 | Chiral lead catalyst and method of asymmetric aldol reaction A novel chiral lead catalyst comprising a lead compound of the following formula: Pb(ORf)2 (wherein Rf represents a fluorine-containing alkylsulfonyl group) and a chiral crown ether compound hav... | 08/24/2004 |
| 6759023 | Method for making a hydrazine by hydrolysing an azine The invention relates to a process for manufacturing hydrazine by hydrolyzing an azine, in which the heat required for the reaction and the separation by distillation of the components is partly provided by injecting vaporized water. ... | 07/06/2004 |
| 6576798 | Method and system for purifying cumene hydroperoxide cleavage products A system for purifying a cumene hydroperoxide cleavage product mixture comprises a cumene hydroperoxide cleavage product mixture feed containing impurities in fluid communication with an aqueous alkaline solution feed; the cumene hydroperoxide cleavage pr... | 06/10/2003 |
| 6573408 | System and method for purifying cumene hydroperoxide cleavage products A system for purifying a cumene hydroperoxide cleavage product mixture comprises a cumene hydroperoxide cleavage product mixture feed containing impurities in fluid communication with an aqueous alkaline solution feed; the cumene hydroperoxide cleavage pr... | 06/03/2003 |
| 6555715 | Conversion of light paraffins to oxygenates or olefins using an imide promoter A process has been developed for oxygenating linear C2 to C6 alkanes to ketones or aldehydes. The process involves reacting the alkanes with oxygen in the presence of a catalyst comprising an imide promoter and a metal co-catalyst. A... | 04/29/2003 |
| 6517798 | Method for preparing hydrazine hydrate The invention concerns a method for making hydrazine hydrate which consists in hydrolyzing methyl ethyl ketone azine to obtain hydrazine hydrate and methyl ethyl ketone, characterised in that it consists in purging heterocyclic compounds of the pyrazoline... | 02/11/2003 |
| 6479710 | Method of catalyzing a gas phase reaction using an acid-base catalyst composed of vanadium pentoxide hydrate A solid acid-base catalyst contains vanadium pentoxide hydrate. Moreover, it is preferable that the vanadium pentoxide hydrate in the solid acid-base catalyst has a composition which is represented by the following general equation (1): V2 O | 11/12/2002 |
| 6380437 | Process for the preparation of unsaturated 4,5-allene ketones, 3,5-diene ketones and the corresponding saturated ketones Process for the preparation of unsaturated 4,5-allene ketones by reaction of tertiary propargyl alcohols with alkenyl alkyl ethers or ketals in the presence of aliphatic sulfonic acids or sulfonic acid salts.... | 04/30/2002 |
| 6376719 | Process for the preparation of alkaline earth metal salts of ଲ-diketo compounds An alkaline earth metal salt of ଲ-diketo compound is produced using 1 mol of a powdery alkaline earth metal compound and 2.04 mol or more of an aliphatic ଲ-diketo compound. The reaction may be carried out while supplying both components to a r... | 04/23/2002 |
| 6376718 | Dehydrogenation of alkylene glycol ethers to ether ketones and aldehydes A catalytic dehydrogenation of alkylene glycol ether to ether ketone or aldehyde is disclosed. The dehydrogenation is performed with copper chromite catalyst and at least 5 wt % of water based on alkylene glycol ether. It has been found that the selectivi... | 04/23/2002 |
| 6359179 | Direct carbonylation of paraffins using solid strong acid catalyst A process for the direct carbonylation of saturated hydrocarbons has been developed. The process involves contacting the saturated hydrocarbons, which contain at least one primary, secondary or tertiary carbon atom, with carbon monoxide in the presence of... | 03/19/2002 |
| 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 |
| 6329554 | Continuous preparation of unsaturated ketones Process for the continuous preparation of unsaturated ketones of the formula I ##STR1## where the dashed line can be an additional C--C bond, R1 is an alkyl, and R2 is an aliphatic hydrocarbon having from 1 to 37 carbons, a cycl... | 12/11/2001 |
| 6310258 | Process for preparing 1,3-diketones The invention provides a process for preparing 1,3-diketones by rearrangement of the isomeric enol ester in a tube reactor comprising a heated portion and an unheated insulated portion which can optionally be provided with cooling means. The unheated port... | 10/30/2001 |
| 6300524 | Process for preparing higher unsaturated ketones The present invention relates to an improved process for preparing higher unsaturated ketones by reacting the corresponding ,ଲ-unsaturated alcohols with alkyl acetoacetates in a Carroll reaction , in a reactor system with fitted fractionation... | 10/09/2001 |
| 6300523 | Noncatalytic organic synthesis using supercritical water This invention is intended to provide a method for producing pinacoline by means of pinacol rearrangement in supercritical water, which affords an extremely high reaction rate without the addition of high concentrations of acid, and this invention is dire... | 10/09/2001 |
| 6232506 | Process for producing 6-methyl-3-hepten-2-one and 6-methyl-2-heptanone analogues, and process for producing phytone or isophytol Provided are a process for producing 6-methyl-3-hepten-2-one by cross aldol condensation carried out while each continuously adding to acetone, isovaleraldehyde and an aqueous alkali containing an alkaline substance; a process for producing a 6-methyl-2-h... | 05/15/2001 |
| 6232505 | Methoxyacetone preparation A process for making methoxyacetone is disclosed. The process comprises oxidizing 1-methoxy-2-propanol in the liquid phase using aqueous hydrogen peroxide and a Group 8-10 transition metal catalyst. The process gives high alcohol conversions (>95%) and go... | 05/15/2001 |
| 6211412 | Synthesis of epothilones Commercially feasible methods for synthesizing various epothilones precursors needed for the preparation of final epothilones are provided, including techniques for the synthesis of epothilone segment C using a stereoselective Noyori-type reduction, and t... | 04/03/2001 |
| 6165352 | Process for dehydrogenating hydrocarbons and oxygenated hydrocarbons A continuous process for the dehydrogenation of a hydrocarbon and/or oxygenated hydrocarbon feed, comprising contacting the hydrocarbon and/or oxygenated hydrocarbon feed with a dehydrogenation catalyst at elevated temperature in a reaction zone character... | 12/26/2000 |
| 6072087 | Method for producing carbonyl compounds The present invention relates to a process for the preparation of carbonyl compounds of the formula ##STR1## in which R1 denotes a hydrogen atom or an alkyl radical containing from 1 to 3 carbon atoms, R2 denotes a hydrogen atom... | 06/06/2000 |
| 6051741 | Preparation of γ,δ-unsaturated ketones by the Carroll reaction, novel catalysts therefor and the preparation thereof A process for preparing γ,δ-unsaturated ketones of the general formula I ##STR1## by reacting an allyl alcohol of the general formula II ##STR2## in which R1 is H or a hydrocarbon radical having 1 to 20 carbon atoms, with diket... | 04/18/2000 |
| 6049010 | Method of preparing 3-(3-methyl-2-buten-1-yl)-2,4-pentanedione and related dicarbonyl compounds A method for preparation of a dicarbonyl compound of the following formula ##STR1## by reacting a conjugated alkadiene compound of the formula ##STR2## with a 1,3-dicarbonyl compound of the formula ##STR3## in the presence of an acid cataly... | 04/11/2000 |
| 6025530 | Phenol tar cracking process The present invention relates generally to a method for treating phenol tar, and, more particularly to a method for separating valuable products from phenol tar by treating the tar with steam.... | 02/15/2000 |
| 5936129 | Process for making sterically-hindered ଲ-diketones A process for making a sterically-hindered beta-diketone involving: (a) providing a solution comprising: (i) an ester; (ii) a base; and (iii) a solvent; (b) adding a ketone selected from the group consisting of an aromatic ketone and a hindered aliphatic ... | 08/10/1999 |
| 5929286 | Method for making hydrogen rich gas from hydrocarbon fuel A method of forming a hydrogen rich gas from a source of hydrocarbon fuel in which the hydrocarbon fuel contacts a two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion at a temperature not less than about 400° C. for... | 07/27/1999 |
| 5914013 | Selective thermal and photooxidation of hydrocarbons in zeolites by oxygen A process for selective thermal oxidation or photooxidation of hydrocarbons adsorbed onto zeolite matrices. A highly selective thermal oxidation and photooxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls in solven... | 06/22/1999 |
| 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 |
| 5874635 | Preparation of γ, δ-unsaturated ketones by the carroll reaction in cyclic carbonates or γ-lactones A process for preparing γ,δ-unsaturated ketones by a) reacting vinylcarbinols or propargyl alcohols with alkyl acetoacetates or diketene and b) thermally rearranging the resulting acetoacetates in the presence or absence of an aluminum catalyst to γ,δ-unsa... | 02/23/1999 |
| 5786515 | Synthesis of -chloro or fluoro ketones A simple, high yielding synthesis of a-chloro ketones is described, involving acylation of Grignard and organolithium reagents with N-methoxy-N-methylchloroacetamide. The efficiency of the process is further enhanced by recycling N,O-dimethylhydroxylamine... | 07/28/1998 |
| 5744071 | Processes for preparing alkynyl ketones and precursors thereof The present invention provides processes for making alkynyl ketones and precursors thereof, using less expensive reagents and/or hydrocarbon solvents and/or higher temperatures.... | 04/28/1998 |
