Patents
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Patents for C07C 39 - Compounds having at least one hydroxy or o-metal group bound to a carbon atom of a six-membered aromatic ring (10,875)
02/1990
02/20/1990US4902836 Process for inhibiting dihydric phenol degradation and color formation and composition thereof
02/15/1990DE3832396A1 Dihydroxydiphenylcycloalkanes, their preparation, and their use for the preparation of high-molecular-weight polycarbonates
02/13/1990US4900873 Method of manufacturing phenols from lignin
02/13/1990US4900708 Ortho-alkylation catalysts based on magnesium and prepared by calcining in presence of feed mixture of reactants
02/13/1990CA1265775A1 Catalyst and process for preparing p-isopropenyl phenol
02/07/1990EP0354134A1 Process for the monomethylation of phenolic compounds
02/07/1990EP0353339A2 A process for the production of poly(3-mono or 3,5-disubstituted-4-Acetoxystryrenes), their copolymers and hydrolysis thereof
02/07/1990CN1039411A Process for low residence time dehydration of p-acetoxyphenyl methylcarbinol
02/06/1990US4898994 Cofeeding 2,6-dialkyl-4-methoxymethylphenol and sulfuric acid to alkylbenzene; two stage; by-product inhibition
02/06/1990US4898864 Bicyclic aromatic compounds, a process for their preparation and their use in cosmetics and human and veterinary medicine
01/1990
01/31/1990EP0352713A1 Method and compositions providing enhanced chemiluminescence from 1,2-dioxetanes
01/31/1990EP0352505A1 Method for the production of thymol
01/24/1990EP0351860A2 Color light-sensitive material
01/24/1990EP0247035B1 Optically active dl-nordihydroguaiaretic acid isomers and their racemates, process for preparing them and method of imparting a ple
01/23/1990US4895988 Process for the mutual condensation of aromatic and carbonylic compounds
01/23/1990CA1264764A1 Process for producing aromatic diols and their ether derivatives
01/17/1990EP0350842A2 Pyramidal liquid crystals
01/17/1990EP0350699A2 Process for puryfying dihydric phenols
01/17/1990EP0350695A2 Process and composition for inhibiting dihydric phenol degradation and colour quality reduction
01/16/1990US4894487 Preparation process of 4-(4-hydroxyphenyl)-cyclohexanol
01/16/1990US4894486 Lactic acid, glyceric acid, malic acid
01/16/1990US4894432 Copolymer of diphenol, triphenol and carbonic acid
01/09/1990US4892924 Optical
01/03/1990EP0349382A1 Process for purifying dihydroxybiphenyls
01/02/1990US4891465 Process for producting alkyl group-substituted aromatic hydrocarbons
01/02/1990US4891453 Dealkylation of 3,3',5,5'-tetra-tert-butylanalog
01/02/1990US4891452 Catalytic hydroxylation of bromobiphenyls
01/02/1990US4891448 Acidic mordenite catalyst
12/1989
12/27/1989EP0347710A2 Phenol alkylation process
12/27/1989EP0347709A1 Phenol alkylation process
12/20/1989EP0346913A2 Process for the synthesis of phenyl substituted aromatic diols
12/20/1989EP0346593A1 Process for preparing 4,4'-dihydroxybiphenyl
12/19/1989US4888050 Grass control
12/14/1989WO1989012037A1 Process for the preparation of (arylethyl)hydroquinones and diesters thereof
12/13/1989EP0346250A1 Process for the hydroxylation of phenols and phenol ethers
12/13/1989CN1037890A Process for preparing biphenol a
12/12/1989US4886907 Polysubstituted derivatives of naphthalene, their process of preparation and their application in the cosmetic and pharmaceutical fields
12/12/1989US4886891 Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative
12/06/1989EP0344165A1 Thermoset polymers of styrene terminated tetrakis phenols.
12/05/1989US4885408 Chlorination of ortho-substituted phenols
12/05/1989US4885407 Method for recovering a dihydric phenol from a scrap polyester
12/05/1989US4885406 Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium aryl oxides
11/1989
11/29/1989EP0343798A1 Preparation of aromatic compounds and derivatives thereof
11/29/1989EP0343382A1 Method for the production of bis-phenols
11/28/1989CA1263409A1 Phenols and use thereof as stabilisers
11/23/1989EP0342758A1 Preparation of bisphenols
11/23/1989EP0342483A1 Antioxidant
11/22/1989CN1037328A Process for producing 2,2-bis (4-hydroxyphenyl) propane
11/22/1989CN1037327A Process for preparation of 2,3-difluorobenzenes
11/15/1989EP0341681A2 6-Phenoxymethyl-4-hydroxytetrahydropyran-2-ones and 6-thiophenoxymethyl-4-hydroxytetrahydropyran-2-ones, the corresponding dihydrocarboxylic-acid derivatives, salts and esters, process for preparing these compounds, their use as medicines, pharmaceutical compositions and phenols and thiophenols
11/14/1989US4880775 Perfumes
11/14/1989US4880637 Compositions of catecholic butanes with zinc
11/08/1989EP0341165A1 Process for the preparation of phenol
11/08/1989EP0341164A1 Method for the preparation of dihydroxybenzenes
11/08/1989EP0341113A1 Process for the manufacture of halophenols
11/08/1989EP0182872B1 A process for the preparation of cyclobutene-substituted aromatic hydrocarbons
11/02/1989DE3813636A1 Process for the removal of indole, quinoline bases and higher phenol derivatives from coal tar oil by extraction with supercritical gases
10/1989
10/31/1989US4877909 Process for reducing aldehydes or ketones
10/31/1989US4877907 Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor
10/31/1989US4877732 Culturing strain of pseudomonas putida with benzotrifluoride or analogs
10/25/1989EP0338898A1 Process for the preparation of an ortho-substituted mono-brominated derivative of phenol
10/25/1989CN1036559A Process for preparing high-purity bisphenol a
10/24/1989US4876396 At ortho position to hydroxyl; amine catalysts
10/24/1989US4876395 Process for color stabilization of bisphenol-A
10/24/1989US4876391 Process for preparation and purification of bisphenols
10/24/1989US4876381 Naphthalene derivatives possessing a retinoid-type action, processes for their preparation, and medicinal and cosmetic compositions containing these derivatives
10/18/1989EP0337890A1 Complexes from anthralin and one sterol, process for their preparation and their use in therapeutics and cosmetics
10/18/1989EP0337175A1 Electrochemical synthesis of 2-aryl-hydroquinones
10/17/1989US4874891 Open "D" ring hormone analogs
10/11/1989CN1036198A Prepn. for bisphenol a
10/10/1989US4873376 Process for the production of monomeric alkenylphenols from dihydroxydiphenylalkanes
10/10/1989US4873374 Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor
10/05/1989WO1989009203A1 Octafluorobiphenyls
10/04/1989EP0335674A2 Selective process for preparing 2,4- or 3,6-di-substituted phenol compounds
10/04/1989CN1036010A 3-(2-hydroperoxy-2-propyl) phenol and method of producing resorcinol using the same
10/03/1989US4871877 Catalyst, proton source and perfluoroalkyltrihydrocarbyl silane reacting with a quinone; hydroxyl and trifluoromethyl substituted
10/03/1989US4871470 Cyclohexane derivatives
10/03/1989CA1262147A1 Brominated hydroxyaromatic compounds
09/1989
09/27/1989EP0334195A2 Process for synthesizing hydroxymethyl-dihalo-dialkylphenol
09/27/1989EP0334119A1 Compounds for inhibiting the biosynthesis of lipoxygenase-derived metabolites of arachidonic acid
09/27/1989EP0334097A2 Process for the preparation of 4,4'-Dihalogeno-bisphenyls
09/27/1989CN1035819A Process for producing phenol and/or cyclohexanone
09/26/1989US4870219 Neoplasms, dermatoses
09/26/1989US4870216 Phenol alkylation process
09/26/1989US4870215 Phenol alkylation process
09/26/1989US4870214 Olefin homo- and copolymers
09/26/1989US4870084 Analgesics, antidiarrheals
09/26/1989CA1260920A1 Crystalline magnesia-silica composites and process for producing same
09/21/1989WO1989008687A1 2,3-difluorobiphenyls
09/21/1989WO1989008629A1 Process for preparing 2,3-difluorobenzenes
09/20/1989EP0332878A1 Process for washing and obtaining an adduct of bisphenol A with phenol
09/20/1989EP0332877A1 Process for preparing bisphenol A
09/20/1989EP0332615A1 Process for preparing water clear phenol.
09/19/1989US4868343 Acid catalyzed process
09/13/1989EP0332380A2 Process for producing a phenol and/or a cyclohexanone
09/13/1989EP0332203A1 Process for preparing high-purity bisphenol A
09/12/1989CA1259334A1 Triphenol type compound and polycarbonate polymer and production process thereof
09/08/1989WO1989008092A1 Removal of organic compounds from fluids
09/06/1989EP0331173A1 Process for preparing 4,4'-dihydroxydiphenylmethane
09/06/1989CN1035282A Washing process for recovery of solidity from slurry
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