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)
06/1990
06/12/1990US4933475 Pharmacologically active 4-[2-hydroxy-4-(substituted)phenyl]naphthalen-2(1H)-ones and 2-ols, derivatives thereof and intermediates therefor
06/06/1990EP0371738A2 Preparation of phenol through cumene
06/05/1990US4931594 9,9-bis/4-hydroxyphenyl/fluorene by reacting phenol with fluorenone; acidic cationic exchange resin catalyst
06/05/1990US4931146 Process for obtaining high-purity bisphenol A
05/1990
05/30/1990EP0370729A1 Process for producing isopropylnaphthols
05/30/1990EP0370555A2 A process for the separation of a phenol
05/30/1990EP0370553A2 Basic metal-zeolite compositions, their preparation and use in base catalyzed reactions
05/30/1990EP0370343A1 Method for the production of 4-methyl-2-cyclohexylphenol
05/29/1990US4929771 Process for the preparation of alkyl-substituted phenols or naphthols
05/29/1990US4929770 Distillation, solidification, filtration
05/29/1990US4929762 Process for producing a phenol and/or a cyclohexanone
05/23/1990CA2003562A1 Basic metal-zeolite compositions, their preparation and use in base catalyzed reactions
05/23/1990CA2003558A1 Process for the separation of a phenol
05/22/1990US4927979 Process for the preparation of p-ethylphenol
05/22/1990US4927978 Forming adduct crystals of a bisphenol and a phenol
05/22/1990US4927973 Crystallization
05/17/1990DE3918762A1 Prepn. of cumyl:phenol or methyl derivs. from e.g. phenol - on cation-exchanger and anion-exchanger, after pre-activation of phenol and cation-exchanger
05/16/1990EP0367869A1 Tetrabromobisphenol-A process
05/09/1990EP0367408A2 Method for production of phenol/acetone from cumene hydroperoxide
05/08/1990CA1268782A1 Process for the preparation of tribromotetramethylbiphenol and related compounds
05/02/1990EP0365791A2 Process for producing an antioxidant from phenolic pitch
05/01/1990US4922031 Biphenyldisulfonic acid, alkali metal hydroxide
05/01/1990US4921994 Pharmacologically active 2-hydroxy-4-(substituted) phenyl cycloalkanes and derivatives thereof
05/01/1990CA1268473A1 Analogs of mevalonolactone and derivatives thereof, processes for their production, pharmaceutical compositions containing them and their use as pharmaceuticals
04/1990
04/25/1990EP0365440A1 Method of destroying peroxides in acetone
04/25/1990EP0364808A2 Process for preparing dihydroxydiaryl alkanes
04/25/1990CN1041581A Phenol preparation process and propylene recovery therefrom
04/18/1990EP0364378A1 Process for the preparation of methyl hydroquinone
04/18/1990EP0363801A2 Process for making 3,5-dialkyl-4-hydroxybenzyl-substituted aromatics
04/17/1990US4918245 Process for preparing bisphenol A
04/10/1990US4915875 Nucleophilic substitution
04/04/1990EP0361755A2 Phenol preparation process and propylene recovery therefrom
04/04/1990EP0360874A1 Process for preparing para-cumylphenol
04/04/1990CN1040980A Method and compositions providing enhanced chemiluminescence from 1,2-dioxetanes
04/03/1990US4914246 Reacting phenol and linear olefins using acid catalyst
04/03/1990CA1267422A1 Process for the conversion of t-alkylphenol waste distillation bottoms to para-t-alkylphenol
03/1990
03/28/1990EP0360092A1 Process for preparing 4,4"-dihydroxyterphenyl
03/28/1990EP0359953A1 Dihydroxydiphenylcycloalkanes, their preparation and their use for the preparation of high molecular polycarbonates
03/27/1990US4912264 Liquid phase alkylation of a hydroxyl containing aromatic compound
03/27/1990US4912263 Ionic exchangers modified with thiazolines
03/27/1990CA1267159A1 Process for the preparation of 4,4'-biphenol
03/21/1990EP0358992A2 Process for the manufacture of bis-phenols
03/20/1990US4909997 Tetrabromobisphenol-A process
03/14/1990EP0358574A1 Process for the preparation of adamantane-1 derivatives
03/12/1990EP0303617A4 Acid catalyzed process.
03/06/1990US4906793 Silica-titania hydrocarbon conversion catalyst
03/06/1990US4906791 Process for preparing p-cumylphenol
03/06/1990US4906790 Method of oxidizing secondary alkyl substituted naphtalenes and a process of producing isopropylnaphthols
03/06/1990US4906789 Methods for bisphenol A production
02/1990
02/28/1990EP0355513A2 Isomerisation or homologisation of bisphenols
02/28/1990EP0355319A2 Process for recovering a dihydric phenol from a scrap polyester
02/20/1990US4902837 Process for preparing Biphenols
02/20/1990US4902836 Process for inhibiting dihydric phenol degradation and color formation and composition thereof
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
02/07/1990EP0353813A1 Alkylation of aromatic hydrocarbons in a fixed bed catalytic process
02/06/1990US4898995 Decomposition with heteropoly acid catalysts on inert support
02/06/1990US4898994 Cofeeding 2,6-dialkyl-4-methoxymethylphenol and sulfuric acid to alkylbenzene; two stage; by-product inhibition
02/06/1990US4898987 Method for production of phenol/acetone from cumene hydroperoxide
01/1990
01/31/1990EP0352713A1 Method and compositions providing enhanced chemiluminescence from 1,2-dioxetanes
01/31/1990EP0352505A1 Method for the production of thymol
01/23/1990US4895988 Process for the mutual condensation of aromatic and carbonylic compounds
01/23/1990US4895755 Halogenated advanced epoxy resins
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
01/10/1990EP0350344A1 Layered intercalated metal oxides, and process for their preparation
01/09/1990CA1264333A1 Butylated and octylated dialkyldiphenylamine
01/03/1990EP0349382A1 Process for purifying dihydroxybiphenyls
01/03/1990EP0173748B1 Process for producing substituted unsaturated six-membered ring compounds from phenol derivatives
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
12/27/1989EP0347835A2 Process for preparing aryl-ethyl phenols having one or more alkyl substituents in the ethyl group and their use
12/27/1989EP0347710A2 Phenol alkylation process
12/27/1989EP0347709A1 Phenol alkylation process
12/21/1989DE3820192A1 Process for the preparation of 4,4'-dihalobiphenyls
12/20/1989EP0346913A2 Process for the synthesis of phenyl substituted aromatic diols
12/20/1989EP0346593A1 Process for preparing 4,4'-dihydroxybiphenyl
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
12/13/1989CN1037891A Process for preparing high purity biphenol a
12/13/1989CN1037890A Process for preparing biphenol a
12/12/1989US4886927 Process for isomerization of alkylaromatics
12/12/1989US4886891 Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative
12/07/1989DE3911247A1 Process for recovering phenols from their mixtures
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
11/29/1989EP0343349A1 Process for obtaining high-purity bisphenol A
11/23/1989EP0342758A1 Preparation of bisphenols
11/22/1989CN1037328A Process for producing 2,2-bis (4-hydroxyphenyl) propane
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