Patents
Patents for C07C 37 - Preparation of compounds having hydroxy or o-metal groups bound to a carbon atom of a six-membered aromatic ring (10,407)
03/1999
03/10/1999CN1210512A Phenol compound hydroxylacion method
03/04/1999WO1999010357A1 Binuclear non-heme iron catalysts
03/03/1999CN1209428A Preparation for phenol and derivative thereof
03/02/1999US5877355 2-hydroxy-5-alkyl-beta-methylstyrene and process of preparing hydroxyarylaldehydes therefrom
02/1999
02/23/1999US5874647 Benzene hydroxylation catalyst stability by acid treatment
02/23/1999US5874646 Catalytic hydroxylation of an aromatic compound with nitrous oxide in the presence of a zeolite catalyst containing a group 8 metal; reduced carbon monoxide production during regeneration
02/23/1999US5874645 Heating dihydroxydiphenyl compound with acid to cause formation of double bond
02/23/1999US5874596 Titanosilicate catalyst particle
02/23/1999US5873981 Mixing excess phenolic azeotrope with aqueous alkanesulfonic acid, boiling off water and recycling solution to reactor in which a phenol and an alpha-haloketone react to form a dihydroxy-alpha-alkylstilbene
02/18/1999DE19735199A1 Removing nitrogenous impurities from halo:phenol compounds
02/18/1999DE19728379C1 Herstellung und Reinigung von 3-(4-Hydroxyphenyl)-1,1,3-trimethylindan-5-ol Preparation and purification of 3- (4-hydroxyphenyl) -1,1,3-trimethylindan-5-ol
02/18/1999DE19728377C1 Herstellung und Reinigung von 3-(4-Hydroxyphenyl)-1,1,3-trimethylindan-5-ol Preparation and purification of 3- (4-hydroxyphenyl) -1,1,3-trimethylindan-5-ol
02/17/1999CN1208398A Process for the preparation of para-fluorophenol
02/11/1999WO1999006145A1 Process for the preparation of a catalytic microcomposite from a silicate and a highly fluorinated ion exchange resin
02/11/1999DE19727351C1 Verfahren zur Herstellung von Phosphoniumphenolaten A process for preparing phosphonium
02/03/1999EP0894783A1 Process for the synthesis of phenol from benzene
02/02/1999US5866739 Heteropoly salts or acid salts deposited in the interior of porous supports
01/1999
01/29/1999CA2240612A1 Preparation of phenol and its derivatives
01/27/1999EP0892773A2 Preparation of aromatic hydroxycarboxylic acids and dialkali metal salts thereof
01/27/1999EP0892772A1 A process for the preparation of calixarenes, and new calixarene compounds
01/26/1999CA2102289C Process for high purity tetrabromobisphenol-a
01/21/1999WO1999002474A2 Method for producing tetrabutyl ammonium phenolate diphenol adduct
01/21/1999WO1999002473A1 A process for the preparation of para-fluorophenol
01/21/1999WO1998034894A3 Hydroperoxide decomposition process
01/20/1999EP0891960A1 Process for the preparation of pyrocathecol mono ethers and pyrocathecols
01/20/1999EP0891368A1 Catalytic production or aryl alkyl hydroperoxides by polynuclear transition metal aggregates
01/20/1999EP0701577B1 Polymer alkylation of hydroxyaromatic compounds
01/20/1999CN1205683A Improved process for prodn. of bisphenols
01/20/1999CN1205324A Preparation of catechol monoethers and catechols
01/20/1999CN1205322A Method for producing diarymethane or its derivatives
01/14/1999WO1999001415A1 Method for producing and purifying 3-(3-hydroxyphenyl)-1,1,3-trimethylindan-5-ol
01/14/1999WO1999001414A1 Method for preparing and purifying 3-(4-hydroxyphenyl)-1,1,3-trimethylindan-5-ol
01/14/1999WO1999001413A1 Method for producing and purifying 3-(4-hydroxyphenyl)-1,1,3-trimethylindan-5-ol
01/14/1999DE19730022A1 Verfahren zur Herstellung von Tetrabutylammoniumphenolat-Diphenoladdukt A process for the production of tetrabutylammonium phenolate diphenol adduct
01/13/1999EP0890564A2 Process for the preparation of a p-dihydroxyl aromatic compound
01/13/1999EP0890562A1 Process for producing diarylmethanes or their derivatives
01/13/1999EP0651674B1 Catalysts and their use in oxidation of satured hydrocarbons
01/12/1999US5859267 Process for improving color of basic metal organic salts and stabilizing halogen-containing polymers therewith
01/12/1999US5859067 Preparing bis(2-hydroxy-1-naphthyl)decane from the corresponding diacid; forming acid dichloride; treating with 2-naphthol; rearrangement; reduction; inhibits action of adenosine triphosphatase
01/07/1999WO1999000395A1 Method for producing phosphonium phenolates
01/07/1999EP0889018A1 Preparation of phenol and its derivatives
01/07/1999EP0888185A1 PREPARATION AND USE OF NON-CHROME CATALYSTS FOR Cu/Cr CATALYST APPLICATIONS
01/07/1999EP0888175A1 Upflow fixed bed reactor with packing elements
01/07/1999CA2294868A1 Method for producing phosphonium phenolates
01/05/1999US5856589 Method to defoul bisphenol-phenol adduct fouled crystallizer coolers
12/1998
12/30/1998WO1998058893A1 Method for chlorinating halogenated phenols
12/30/1998EP0683761B1 A novel process for the production of high purity and ultrapure bisphenol-a
12/30/1998CN1203579A Improved metal-ligand complex catalyzed processes
12/30/1998CN1203572A Method for c-alkylating hydroxylated aromatic compounds
12/30/1998CN1203535A Thermally-managed separation and dewatering processes for recovering acid products
12/30/1998CN1203219A Process for production of halogeno-O-hydroxydiphenyl compounds
12/30/1998CN1203218A Separation and purification method of T-butyl-methylphenol isomer
12/29/1998US5853949 Method of synthesizing polyphenol compound and positive working photoresist composition comprising polyphenol compound
12/23/1998EP0885865A1 Process for producing phenols
12/23/1998CN1041300C Method for extracting fresh-keeping agent from tea
12/22/1998US5851837 Method for determination of salt stoichiometry
12/17/1998WO1998056737A1 Bromination process
12/17/1998CA2289020A1 Bromination process
12/16/1998CN1201776A Synthesis of p-cresol by direct alkali fusion method from toluene-p-sulfonic acid
12/15/1998US5849959 Derivatives of 2, 3, 6-trifluorophenols and a process for their preparation
12/09/1998EP0882005A1 Phenol compound hydroxylation method
12/08/1998US5847237 Catalyst for ortho-alkylation of phenols, a precursor thereof, and production of ortho-alkylated phenols by use of said catalyst
12/08/1998US5847236 Process for the preparation of 2-chloro-4-methylphenol
12/08/1998US5847235 Method of phenol tar desalting
12/08/1998US5847234 Process for the preparation of 4-hydroxybiphenyl
12/08/1998US5847232 Process for the preparation of tetrabromobisphenol-A
11/1998
11/26/1998WO1998052897A1 Method for processing mother liquors from the production of bisphenol
11/26/1998WO1998052896A1 Method for continuous production of dihydroxydiphenylalkanes
11/26/1998WO1998052895A1 Method for continuous production of dihydroxydiarylalkanes
11/25/1998CN1200105A Isomerization of bisphenols
11/19/1998DE19720541A1 Verfahren zur kontinuierlichen Herstellung von Dihydroxydiphenylalkanen A process for the continuous production of Dihydroxydiphenylalkanen
11/19/1998DE19720540A1 Verfahren zur Aufarbeitung von Mutterlaugen aus der Bisphenolsynthese Process for working up mother liquors from the bisphenol synthesis
11/19/1998DE19720539A1 Verfahren zur kontinuierlichen Herstellung von Dihydroxydiarylalkanen A process for the continuous production of dihydroxydiarylalkanes
11/18/1998EP0878457A1 Separation and purification method of tert.-butyl-methylphenol isomers
11/18/1998CN1199040A Process for preparation of o-secondary butyl phenol
11/18/1998CN1040744C Extraction of natural guaiacol
11/17/1998US5837252 Extraction with acetone reducing nordihydroguaiaretic quinone present by ascorbic acid
11/11/1998EP0876319A1 Improved process for the production of bisphenols
11/11/1998CN1198430A Process for preparing 3,5-dimethylphenol
11/10/1998US5834517 Hair, skin conditioners; improved viscosity
11/10/1998US5834516 Meadowfoam betaines in personal care applications
11/04/1998EP0875494A1 Process for the preparation of 3,5-dimethyl phenol
11/04/1998EP0752914B1 Supported lewis acid catalysts for hydrocarbon conversion reactions
11/04/1998CN1198149A Low metal ion containing 4,4'-(1-(4-(1-(4-hydroxyphenyl)-1-methylethyl) phenyl) ethylidene) bisphenol and photoresist compositions therefrom
11/04/1998CN1197785A Preparation of o-isopropyl phenol
11/03/1998US5830935 Color of basic metal organic salts by employing C7 -C17 alkyl glycidyl esters and stabilized halogen-containing polymers
10/1998
10/29/1998WO1998047843A1 Process for the hydroxylation of 1,4-dichlorobenzene
10/29/1998WO1998047837A1 Method for catalytic and selective oxidation of aromatic compounds
10/29/1998DE19717225A1 Colourant for dyeing keratinous fibre, especially human hair, that can be used without oxidant
10/29/1998DE19717176A1 Verfahren zur katalytischen und selektiven aromatischer Verbindungen Process for the catalytic and selective aromatic compounds
10/28/1998EP0873983A2 Process for decomposition of cumene hydroperoxide
10/28/1998CN1197055A 2,6-isopropyl-phenol preparing method
10/21/1998EP0871527A1 Thermally-managed separation and dewatering processes for recovering acid products
10/21/1998CN1040317C Process for producing parlkaline alkaline-soil metal phenate
10/21/1998CN1040316C Process for production of cresols
10/21/1998CN1040294C Process for production of granula of 2,2-bix(4-hydroxy phenyl) propane
10/15/1998WO1998045234A1 PROCESSES FOR PRODUCING p-SUBSTITUTED PHENOLS
10/08/1998WO1998043934A1 Process for making phenol or phenol derivatives
10/07/1998EP0868417A2 Method to prepare ortho substituted phenol
10/07/1998CN1194966A Process for extracting high-purity tea polyphenols
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