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| Number | Title | Issue Date |
| 7790929 | Chiral phenol derivative, liquid crystal medium containing said chiral phenol derivative The invention relates to chiral phenols, preferably of formula (I), the different parameters having the meaning indicated in the description, liquid crystal media which contain said compounds as chiral doping agents and/or stabilizers, and the use thereof in electro... | 09/07/2010 |
| 7601877 | Process for the preparation of ubihydroquinones and ubiquinones A process for the preparation of ubihydroquinones and ubiquinones by condensation of a prenol or isoprenol with a hydroquinone or derivative thereof in the presence of 0.005-1.0 mol % of a catalyst which is a Broensted-acid, a Lewis-acid from the group consisting of... | 10/13/2009 |
| 7250537 | Method of hydrogenating phenol The present invention provides a novel method of hydrogenating a phenol for hydrogenating a phenol industrially advantageously. The present invention relates, in the case of phenol hydrogenation in which carbon dioxide is made to participate in the reaction, to a me... | 07/31/2007 |
| 7196036 | Catalyst for decomposition of hydrocarbons, process for producing the catalyst, and process for producing hydrogen using the catalyst A catalyst for decomposition of hydrocarbons, comprises porous oxide particles containing magnesium and aluminum, and fine metallic nickel particles which are present in the vicinity of surface of the respective porous oxide particles, and have an average particle d... | 03/27/2007 |
| 7183119 | Method for sensitive detection of multiple biological analytes The present invention relates to a method of detecting biological analytes comprising suspending a target analyte in a suspending solution containing polymeric particles marked with a probe, wherein the probe has an affinity for said target analyte; adding recogniti... | 02/27/2007 |
| 7090817 | Process for the preparation of hydroxylammonium The invention relates to a process for the preparation of hydroxylammonium, said process comprising the steps of: a) feeding gaseous hydrogen to a reaction mixture, said reaction mixture comprising an aqueous reaction medium and a gaseous phase; ... | 08/15/2006 |
| 7078570 | Substituted cyclohexenes The present invention relates to substituted cyclohexenes, to their use as well as to their preparation method. These compounds have powerful long lasting natural fruity grapefruit notes with minty and fresh green tonalities. ... | 07/18/2006 |
| 7074622 | Method and system for sorting and separating particles The present invention relates to a method of particle separation comprising preparing a suspension of particles containing at least one recognizable target particle in a suspending solution, labeling the target particle with a conjugate marker, wherein the conjugate... | 07/11/2006 |
| 7030279 | Process for transition metal free catalytic aerobic oxidation of alcohols under mild conditions using stable free nitroxyl radicals An alcohol can be oxidized by a process in which a primary or secondary alcohol are reacted with an oxygen-containing gas in the presence of a catalyst composition containing (i) a stable free nitroxyl radical derivative, (ii) a nitrate source, (iii) a bromide sourc... | 04/18/2006 |
| 7002048 | Method for removal of acetol from phenol A method is provided for the efficient, low cost removal of acetol from a phenol stream. The method results in removal of substantially all of the acetol from the phenol stream without the formation of substantial amounts of additional methylbenzofuran. The method a... | 02/21/2006 |
| 6939996 | Process for the hydrogenation of alkylaryl ketones The present invention pertains to a process for the hydrogenation of alkylaryl ketones, which process involves contacting a feed containing the alkylaryl ketones and from 0.5% to 30% by weight of phenolic compounds with hydrogen in the presence of a heterogeneous hy... | 09/06/2005 |
| 6939479 | Cycloalkanone derivatives Described herein are compounds of formula I wherein M1, M2 and M3 have the meanings recited in the disclosure, liquid crystalline mixtures and polymers containing them, and the use of t... | 09/06/2005 |
| 6740785 | Catalytic oxidation of organic substrates by transition metal complexes in organic solvent media expanded by supercritical or subcritical carbon dioxide Improved oxidation methods are provided wherein a reaction mixture comprising a substrate to be oxidized (e.g., phenols, alkenes) and an oxidation catalyst (typically dispersed in an organic solvent system) is supplemented with a compressed gas which expands the rea... | 05/25/2004 |
| 6703527 | Method for oxidation of allyl alcohol Allyl alcohols are converted into corresponding aldehydes or ketones in a high yield under a mild condition by using an inexpensive aluminum alkoxide as an Oppenauer oxidation catalyst and a hydride acceptor. Thus, there is provided an industrially useful... | 03/09/2004 |
| 6610889 | Catalytic compositions and methods for asymmetric aldol reactions Methods and compositions are provided for the direct catalytic asymmetric aldol reaction of aldehydes with donor molecules selected from ketones and nitroalkyl compounds. The reactions employ as catalyst a Group 2A or Group 2B metal complex of a ligand of... | 08/26/2003 |
| 6448454 | Catalytic oxidation of organic substrates by transition metal complexes in organic solvent media expanded by supercritical or subcritical carbon dioxide Improved oxidation methods are provided wherein a reaction mixture comprising a substrate to be oxidized (e.g., phenols, alkenes) and an oxidation catalyst (typically dispersed in an organic solvent system) is supplemented with a compressed gas which expa... | 09/10/2002 |
| 6376717 | Preparation of astaxanthin The present invention provides a method for preparing astaxanthin from zeaxanthin. Specifically, the present invention provides a method for said conversion using a halogenating agent with the salt of chloric or bromic acid in an inert solvent.... | 04/23/2002 |
| 6372946 | Preparation of 4,4'-diketo-ଲ-carotene derivatives A method of preparing ଲ-carotene derivatives such as canthaxanthin and astaxanthin is described. The method employs an in situ system to generate hypobromous acid as the oxidizing agent using a salt of sulfite, hydrogen sulfite or bisulfite in combi... | 04/16/2002 |
| 6313351 | Process for producing alicyclic monoketones and process for producing alicyclic diketones The process for producing alicyclic monoketones (hydroxyphenylcyclohexanone derivatives) according to the present invention comprises hydrogenating substituted bisphenols such as bisphenol A in a solvent in the presence of a palladium/alkali metal catalys... | 11/06/2001 |
| 6215028 | Process for the preparation of cyclohexanones The invention relates to a process for the preparation of cyclohexanones from the corresponding phenols by partial hydrogenation, characterized in that the reaction mixture obtained by means of the hydrogenation is treated with sulfonating agents before t... | 04/10/2001 |
| 6046365 | Process for preparing cyclohexanones by hydrogenation of the corresponding phenols (I.) Unsubstituted or substituted 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 catalyst is mi... | 04/04/2000 |
| 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 |
| 5932753 | Process for producing 2-methyl-1,4-benzoquinone A process for producing 2-methyl-1,4-benzoquinone at a high conversion, a high selectivity and at a low cost by oxidizing m-cresol with oxygen at a low partial pressure in the presence of at least one copper (I) halide catalyst and a mixed solvent of keto... | 08/03/1999 |
| 5880301 | Optically active bidentate phosphine ligand palladium complex The present invention provides a novel optically active bidentate phosphine ligand palladium complex of formula (I) or (II) which can be used for the preparation of optically active ଲ-hydroxyketones: ##STR1## wherein Y- represents ... | 03/09/1999 |
| 5821374 | Process for the oxidation of alcohols A process for oxidizing primary and secondary alcohols to the corresponding aldehydes and ketones is disclosed. The oxidation is carried out by reacting the primary or secondary alcohol with an organic N-chloro compound oxidizing agent in the presence of ... | 10/13/1998 |
| 5744648 | Process for the manufacture of 1, 3-cyclohexanedione A new process for the manufacture of 1,3-cyclohexanedione is disclosed wherein a selected resorcinol is reduced with a hydrogen donor in the presence of a metal catalyst to produce a product which is then neutralized with an acid.... | 04/28/1998 |
| 5712416 | Preparation of benzoquinones by oxidation of phenols Process for preparing benzoquinones by oxidation of phenols in the presence of a diluent and of an oxygen-transferring catalyst which contains a heavy metal ion bound in a complex, wherein oxygen, hydrogen peroxide, a compound which liberates hydrogen per... | 01/27/1998 |
| 5395976 | Process for the preparation of a mixture of cyclohexanone and cyclohexanol In the hydrogenation of phenol with H2 over Pd supported catalysts, the ratio of the products formed, cyclohexanone and cyclohexanol, can be predetermined by specific treatment of the catalysts during the initial activation and regeneration by ... | 03/07/1995 |
| 5288742 | , dialkylbenzyl derivatives The invention concerns ,-dialkylbenzyl derivatives of the formula I ##STR1## wherein Ar1 is phenyl or naphthyl, or a 10-membered bicyclic heterocyclic moiety containing one or two nitrogen heteroatoms and optionally cont... | 02/22/1994 |
| 5015786 | Preparation of cumene through alkylation of an aromatic compound and preparation of phenol through cumene In a first form, a process is provided for preparing phenol by converting acetone by-produced by the cumene process into isopropanol, and alkylating benzene with the isopropanol and optional propylene, thereby forming phenol without acetone by-product. An... | 05/14/1991 |
| 4846945 | Oxidation process Oxidation of alcohols to ketones using bromine suffers from a side reaction of comparable speed in which a bromide substituted product is formed. Additionally, the use of bromine as reagent is relatively unpleasant and it creates a major waste disposal pr... | 07/11/1989 |
| 4663487 | Preparation of 4,4-disubstituted cyclohexadienones The invention provides a process for the preparation of 4,4-disubstituted cyclohexadienones of which at least one of the substituents is fluorine, which comprises reacting a compound of formula ##STR1## wheren X represents a hydrogen or halogen atom ... | 05/05/1987 |
| 4612401 | Process for the preparation of 4-hydroxy-2,4,6-trimethyl-2,5-cyclohexadienone 4-Hydroxy-2,4,6-trimethyl-2,5-cyclohexadienone is made by chlorinating 2,4,6-trimethylphenol with chlorine in an organic solvent in the absence of base while the hydrogen chloride formed is removed as it is formed by physical means and hydrolyzing the rea... | 09/16/1986 |
| 4565895 | Process for the preparation of 4-hydroxy-2,4,6-trimethyl-2,5-cyclohexadienone 4-Hydroxy-2,4,6-trimethyl-2,5-cyclohexadienone is prepared by oxidation of 2,4,6-trimethylphenol with a manganese derivative of valency greater than 2 in an aqueous acidic medium.... | 01/21/1986 |
| 4562294 | Spiroketone process Spiro[5.5]undeca-1,4,8-trien-3-ones are prepared by heating a reaction mixture consisting essentially of a 4-aminomethylphenol, a conjugated diene, and an inert solvent at a temperature of at least about 190° C.... | 12/31/1985 |
| 4560801 | Process for the preparation of 4-hydroxy-2,4,6-trimethyl-2,5-cyclohexadienone 4-Hydroxy-2,4,6-trimethyl-2,5-cyclohexadienone is prepared by treatment of 2,4,6-trimethylphenol with a halogenation agent and water in the presence of an organic solvent which is inert to the halogenation agent.... | 12/24/1985 |
| 4480133 | Chemical process Novel 2,4-dihydrocarbylspiro[5.5]undeca-1,4,8-trien-3-one compounds are prepared by reacting an N,N-dihydrocarbyl,2,6-dihydrocarbyl-4-aminomethylphenol with a conjugated diene and an alkyl halide in a liquid solvent medium.... | 10/30/1984 |
| 4477682 | Process for producing 4-hydroxy-2,4,6-trimethylcyclohexa-2,5-diene-1-one A process for the preparation of 4-hydroxy-2,4,6-trimethylcyclohexa-2,5-diene-1-one from 2,4,6-trimethylphenol is disclosed, comprising reacting 2,4,6-trimethylphenol with an aqueous solution or suspension of hypohalogenous acid or salt thereof in an... | 10/16/1984 |
| 4460793 | Preparation of monochloromethyl ketones A process for the production of a monochloromethyl ketone of the formula ##STR1## in which R1, R2 and R3 each independently is a hydrogen atom or an optionally substituted alkyl, alkenyl, alkinyl or aryl radical, or R... | 07/17/1984 |
| 4426534 | Method for producing aldehydes and ketones using 2,2'-bipyridinium chlorochromate as oxidizing agent 2,2'-bipyridinium chlorochromate has been found to be an effective oxidizing agent, particularly for the conversion of primary or secondary alcohols to their respective aldehydes or ketones.... | 01/17/1984 |
