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| Number | Title | Issue Date |
| 7868210 | Process for the preparation of phenol A process is described for the preparation of phenol by the hydrodeoxygenation of polyhydroxylated benzene derivatives or by the selective hydroxylation of benzene under depletive conditions, characterized in that the above-mentioned reactions are carried out in the... | 01/11/2011 |
| 7462747 | Process for preparing polyalcohols from formaldehyde having a low formic acid content The invention relates to a process for preparing polymethylol compounds of the formula (I) where the radicals R are each, independently of one another, a further methylol group or an alkyl group having from 1 to 22 carbon a... | 12/09/2008 |
| 7425657 | Palladium catalyzed hydrogenation of bio-oils and organic compounds The invention provides palladium-catalyzed hydrogenations of bio-oils and certain organic compounds. Experimental results have shown unexpected and superior results for palladium-catalyzed hydrogenations of organic compounds typically found in bio-oils. ... | 09/16/2008 |
| 7388116 | Hydrogenation of methylolalkanals Process for the catalytic hydrogenation of methylolalkanals of the general formula where R1 and R2 are each, independently of one another, a further methylol group or an alkyl group having from 1 to 22... | 06/17/2008 |
| 7371358 | Catalyst for treatment and control of post-combustion emissions The present invention utilizes two precious metals with two to five different metal-oxides in a layered matrix to convert CO, HCs, and NOx to CO2, and N2 by oxidation of two components and reduction of the other in a moderately high temperature... | 05/13/2008 |
| 7358399 | Process for the preparation of N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenyl-propaneamine A process is described for the preparation of N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenyl-propaneamine comprising substitution of the sulfonyloxy group of the compound of the formula in which the substituents R an... | 04/15/2008 |
| 7312365 | Process for low temperature cleavage of an oxidation mixture comprising hydroperoxides A process for cleaving an oxidation product comprising s-butyl benzene hydroperoxide and/or cumene hydroperoxide which reduces the production of non-recoverable by-products from dimethylbenzyl alcohol (DMBA) and ethyl methyl benzyl carbinol (EMBA). ... | 12/25/2007 |
| 7282613 | Process for producing phenol and methyl ethyl ketone A process for producing phenol and methyl ethyl ketone (MEK). ... | 10/16/2007 |
| 7230141 | Method for producing toluol derivatives A process for preparing toluene derivatives of the formula I, where R1, R2 and R3 independently of one another are hydrogen, halogen, C1–C6-alkyl, hydroxyl... | 06/12/2007 |
| 7208438 | Catalyst and method for the alkylation of hydroxyaromatic compounds A method of making a catalyst comprising mixing a metal oxide precursor and a pore former to form a metal oxide precursor mixture and calcining the metal oxide precursor mixture in the presence of a flowing gas having a flow rate to form the catalyst comprising meta... | 04/24/2007 |
| 7141703 | Process for producing phenol and ketone using neutralizing base Improved processes for oxidizing alkylbenzene(s) to produce phenol and ketone product(s) using neutralizing base. ... | 11/28/2006 |
| 7119237 | Process and catalyst for preparing alcohols Alcohols prepared by reacting carboxylic acids and/or carboxylic esters with hydrogen in the presence of a special catalyst. ... | 10/10/2006 |
| 6984744 | Phosphine ligands The invention is concerned with new phosphine ligands of formula I wherein R1 and R2 are independently of each other unsubstituted alkyl, aryl, cycloalkyl or heteroaryl, or alkyl, ary... | 01/10/2006 |
| 6936738 | Process for the preparation of phenol by means of the hydrodeoxygenation of benzene-diols A process is described for the preparation of phenol characterized in that the phenol is obtained by means of the hydrodeoxygenation of benzene-diols with hydrogen, operating in continuous, in an aqueous solution, at temperatures ranging from 250 to 500° C., at pre... | 08/30/2005 |
| 6806395 | Process for preparation of 3,5-bisalkylphenols A process for producing a 3,5-bisalkylphenol (2) according to the following reaction scheme: (wherein R1 represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, or a hydroxyl-protecti... | 10/19/2004 |
| 6765118 | Method for the production of alcohols on rhenium-containing activated charcoal supported catalysts In a process for the preparation of alcohols by catalytic hydrogenation of carbonyl compounds, the catalyst used is 0.01 to 50% by weight of rhenium and 0 to 20% by weight, in each case based on the total weight of the catalyst, of at least one further metal chosen ... | 07/20/2004 |
| 6676919 | Method for producing platinum metal catalysts The invention relates to a method for producing catalysts by immersion coating a metallic support with at least one platinum metal. An aqueous medium which comprises at least one platinum metal complex, at least one reduction agent and at least one comple... | 01/13/2004 |
| 6555717 | Catalytic dehydroxylation of diols and polyols Secondary alcohols, specifically diols and polyols, are dehydroxylated to the corresponding primary alcohols using a homogeneous organometallic ruthenium complex catalyst.... | 04/29/2003 |
| 6508753 | Chiral ligands for asymmetric catalysis A novel phosphine ligand is an enantiomerically enriched compound of formula 5 ##STR1## or the opposite enantiomer thereof, wherein Ar1 and Ar2 represent the same or different aromatic groups of up to 20 C atoms. A transition me... | 01/21/2003 |
| 6486337 | Ruthenium-disphosphine complexes and their use as catalysts The present invention concerns novel complexes, suitable in particular for use as catalysts in the asymmetric hydrogenation of ketones, of formula 1 ##STR1## or a diastereoisomer thereof, wherein each Ar is an aromatic or heteroaromatic group of up to 20 atoms... | 11/26/2002 |
| 6201160 | Preparation of alcohols Alcohols are prepared by the catalytic hydrogenation of the corresponding carbonyl compounds at elevated temperatures and at superatmospheric pressure in the liquid phase by a process in which the catalyst used contains copper on an SiO2 -conta... | 03/13/2001 |
| 6156933 | Supercritical hydrogenation Process for the selective hydrogenation of alphatic or aromatic substrates under supercritical or near critical conditions. Hydrogenation is effected using a heterogeneous catalyst in a continuous flow reactor containing a supercritical or near critical r... | 12/05/2000 |
| 6140545 | Preparation of alcohols In a process for preparing alcohols by gas phase hydrogenation of carboxylic acids or esters thereof at elevated temperature and elevated pressure in the presence of catalysts consisting of or comprising, as hydrogenating components, oxides of main group ... | 10/31/2000 |
| 6054627 | Hydrogenation catalyst, process for preparing and process of using said catalyst Disclosed are catalysts in powdered form comprising a major amount of the oxides of a first metal selected from copper or zinc, a second metal selected from chromium, molybdenum, tungsten and vanadium, and optionally, a minor amount of the oxide of a prom... | 04/25/2000 |
| 6015927 | Process for preparing cyclohexanones by hydrogenation of the corresponding phenols (II) Substituted or unsubstituted cyclohexanones are advantageously prepared by hydrogenation of the corresponding phenols in the presence of a palladium-on-carbon catalyst at from 100 to 250° C. and from 1 to 20 bar of hydrogen pressure if the reaction is ca... | 01/18/2000 |
| 5969196 | Process for preparing 3,5-dimethylphenol For the preparation of 3,5-dimethylphenol by catalytic demethylation of isophorone in the gas phase in the presence of a metal or a metal alloy as catalyst, an isophorone-containing process stream is guided through reaction zones that contain said catalys... | 10/19/1999 |
| 5874649 | Process for preparing unsaturated alcohol The object of the present invention resides in efficiently providing unsaturated alcohol from an ,ଲ-unsaturated aldehyde. The present invention provides a process for preparing unsaturated alcohol by selectively reducing the aldehyde group of an ... | 02/23/1999 |
| 5817891 | Preparation of alkylphenols A process for the preparation of alkylphenols of the formula I ##STR1## in which R1, R2, R3, R4, and R5 stand for hydrogen or C1 -C8 alkyl, by reaction of an alkylcyclohex-2... | 10/06/1998 |
| 5763353 | Hydrogenation catalyst precursor, hydrogenation catalyst and production process for alcohols The present invention provides a hydrogenation catalyst precursor which does not bring about a problem of environmental pollution involved in copper-chromium catalysts and has a high activity, a high durability and a high selectivity as compared with thos... | 06/09/1998 |
| 5723694 | Process for preparing monomethylated or dimethylated phenols Phenols monomethylated or dimethylated in the ortho or para position to the OH group and having the formula ##STR1## can be prepared by reaction of tert-alkyl-substituted phenols of the formula ##STR2## in which at least one free ortho or p... | 03/03/1998 |
| 5663458 | Process for producing -phenylethyl alcohol According to a process for producing -phenylethyl alcohol by hydrogenation of acetophenone, which uses a copper-based catalyst containing at least one alkaline earth metal carbonate and/or at least one alkali metal compound, the hydrogenolysis of s... | 09/02/1997 |
| 5639922 | Process for treatment of hydroperoxide mixture A process is described for the selective decomposition of aromatic primary hydroperoxides by contacting a hydroperoxide mixture containing aromatic primary hydroperoxides and aromatic tertiary hydroperoxides obtained by oxidation of alkylaromatic compound... | 06/17/1997 |
| 5614641 | Process for enantioselective hydrogenation of the oxo C.dbd.O double bond The present invention concerns a process for enantioselective catalytic hydrogenation of the ketone C.dbd.O double bond to a secondary alcohol function, said process using a neutral ruthenium complex as the catalyst and a compound containing a C.dbd.O gro... | 03/25/1997 |
| 5600026 | Process for production of cresols There is disclosed a process for the production of cresols, including the steps of: (a) conducting oxygenation of cymene with oxygen gas or an oxygen-containing gas, thereby obtaining a solution of oxygenation products containing tertiary and primary hydr... | 02/04/1997 |
| 5576467 | Method of preparing an alcohol The present invention relates to a method of preparing an alcohol by reducing a carboxylic acid or a derivative thereof, more particularly, a method of preparing an alcohol by a reduction reaction in the presence of a zirconium-titanium oxide catalyst. A ... | 11/19/1996 |
| 5495054 | Tetrahydroindeno[1,2-D][1,3,2]oxazaboroles and their use as enantioselective catalysts A method for the enantioselective reduction of prochiral ketones using catalytic amounts of tetrahydroindeno[1,2-d][1,3,2] oxazaboroles of formula II is disclosed. ##STR1## The oxazaboroles can be generated in situ from the corresponding cis-1-a... | 02/27/1996 |
| 5488173 | Process for selective ortho-methylation of cyclohexanones in the vapor phase A cyclohexanone having at least one ortho-hydrogen is selectively methylated in the ortho-position in the vapor phase. High conversion of the selected cyclohexanone and high selectivity in the ortho-position are obtained. The reaction products include 2-m... | 01/30/1996 |
| 5399791 | Process for production of cresols There is disclosed a process for the production of cresols, including the steps of: (a) conducting oxygenation of cymene with oxygen gas or an oxygen-containing gas without any addition of an alkali, thereby obtaining a solution of oxygenation products co... | 03/21/1995 |
| 5227538 | Catalytic asymmetric reduction of ketones using metal catalysts A process is provided for the catalytic asymmetric reduction of ketones to provide alcohol reaction products which are enriched in one enantiomer. The asymmetric reduction is accomplished utilizing an achiral metal precatalyst in combination with an optic... | 07/13/1993 |
| 5220020 | Catalytic reduction of organic carbonyls using metal catalysts A process is provided whereby organic carbonyl substrates, including esters, lactones, ketones, amides and imides are reduced in a reaction with a silane reducing reagent and a catalyst. Exemplary catalysts include metal alkoxides and metal aryloxides.... | 06/15/1993 |
