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) |
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06/12/1990 | US4933475 Pharmacologically active 4-[2-hydroxy-4-(substituted)phenyl]naphthalen-2(1H)-ones and 2-ols, derivatives thereof and intermediates therefor |
06/06/1990 | EP0371738A2 Preparation of phenol through cumene |
06/05/1990 | US4931594 9,9-bis/4-hydroxyphenyl/fluorene by reacting phenol with fluorenone; acidic cationic exchange resin catalyst |
06/05/1990 | US4931146 Process for obtaining high-purity bisphenol A |
05/30/1990 | EP0370729A1 Process for producing isopropylnaphthols |
05/30/1990 | EP0370555A2 A process for the separation of a phenol |
05/30/1990 | EP0370553A2 Basic metal-zeolite compositions, their preparation and use in base catalyzed reactions |
05/30/1990 | EP0370343A1 Method for the production of 4-methyl-2-cyclohexylphenol |
05/29/1990 | US4929771 Process for the preparation of alkyl-substituted phenols or naphthols |
05/29/1990 | US4929770 Distillation, solidification, filtration |
05/29/1990 | US4929762 Process for producing a phenol and/or a cyclohexanone |
05/23/1990 | CA2003562A1 Basic metal-zeolite compositions, their preparation and use in base catalyzed reactions |
05/23/1990 | CA2003558A1 Process for the separation of a phenol |
05/22/1990 | US4927979 Process for the preparation of p-ethylphenol |
05/22/1990 | US4927978 Forming adduct crystals of a bisphenol and a phenol |
05/22/1990 | US4927973 Crystallization |
05/17/1990 | DE3918762A1 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 |
05/16/1990 | EP0367869A1 Tetrabromobisphenol-A process |
05/09/1990 | EP0367408A2 Method for production of phenol/acetone from cumene hydroperoxide |
05/08/1990 | CA1268782A1 Process for the preparation of tribromotetramethylbiphenol and related compounds |
05/02/1990 | EP0365791A2 Process for producing an antioxidant from phenolic pitch |
05/01/1990 | US4922031 Biphenyldisulfonic acid, alkali metal hydroxide |
05/01/1990 | US4921994 Pharmacologically active 2-hydroxy-4-(substituted) phenyl cycloalkanes and derivatives thereof |
05/01/1990 | CA1268473A1 Analogs of mevalonolactone and derivatives thereof, processes for their production, pharmaceutical compositions containing them and their use as pharmaceuticals |
04/25/1990 | EP0365440A1 Method of destroying peroxides in acetone |
04/25/1990 | EP0364808A2 Process for preparing dihydroxydiaryl alkanes |
04/25/1990 | CN1041581A Phenol preparation process and propylene recovery therefrom |
04/18/1990 | EP0364378A1 Process for the preparation of methyl hydroquinone |
04/18/1990 | EP0363801A2 Process for making 3,5-dialkyl-4-hydroxybenzyl-substituted aromatics |
04/17/1990 | US4918245 Process for preparing bisphenol A |
04/10/1990 | US4915875 Nucleophilic substitution |
04/04/1990 | EP0361755A2 Phenol preparation process and propylene recovery therefrom |
04/04/1990 | EP0360874A1 Process for preparing para-cumylphenol |
04/04/1990 | CN1040980A Method and compositions providing enhanced chemiluminescence from 1,2-dioxetanes |
04/03/1990 | US4914246 Reacting phenol and linear olefins using acid catalyst |
04/03/1990 | CA1267422A1 Process for the conversion of t-alkylphenol waste distillation bottoms to para-t-alkylphenol |
03/28/1990 | EP0360092A1 Process for preparing 4,4"-dihydroxyterphenyl |
03/28/1990 | EP0359953A1 Dihydroxydiphenylcycloalkanes, their preparation and their use for the preparation of high molecular polycarbonates |
03/27/1990 | US4912264 Liquid phase alkylation of a hydroxyl containing aromatic compound |
03/27/1990 | US4912263 Ionic exchangers modified with thiazolines |
03/27/1990 | CA1267159A1 Process for the preparation of 4,4'-biphenol |
03/21/1990 | EP0358992A2 Process for the manufacture of bis-phenols |
03/20/1990 | US4909997 Tetrabromobisphenol-A process |
03/14/1990 | EP0358574A1 Process for the preparation of adamantane-1 derivatives |
03/12/1990 | EP0303617A4 Acid catalyzed process. |
03/06/1990 | US4906793 Silica-titania hydrocarbon conversion catalyst |
03/06/1990 | US4906791 Process for preparing p-cumylphenol |
03/06/1990 | US4906790 Method of oxidizing secondary alkyl substituted naphtalenes and a process of producing isopropylnaphthols |
03/06/1990 | US4906789 Methods for bisphenol A production |
02/28/1990 | EP0355513A2 Isomerisation or homologisation of bisphenols |
02/28/1990 | EP0355319A2 Process for recovering a dihydric phenol from a scrap polyester |
02/20/1990 | US4902837 Process for preparing Biphenols |
02/20/1990 | US4902836 Process for inhibiting dihydric phenol degradation and color formation and composition thereof |
02/13/1990 | US4900873 Method of manufacturing phenols from lignin |
02/13/1990 | US4900708 Ortho-alkylation catalysts based on magnesium and prepared by calcining in presence of feed mixture of reactants |
02/13/1990 | CA1265775A1 Catalyst and process for preparing p-isopropenyl phenol |
02/07/1990 | EP0354134A1 Process for the monomethylation of phenolic compounds |
02/07/1990 | EP0353813A1 Alkylation of aromatic hydrocarbons in a fixed bed catalytic process |
02/06/1990 | US4898995 Decomposition with heteropoly acid catalysts on inert support |
02/06/1990 | US4898994 Cofeeding 2,6-dialkyl-4-methoxymethylphenol and sulfuric acid to alkylbenzene; two stage; by-product inhibition |
02/06/1990 | US4898987 Method for production of phenol/acetone from cumene hydroperoxide |
01/31/1990 | EP0352713A1 Method and compositions providing enhanced chemiluminescence from 1,2-dioxetanes |
01/31/1990 | EP0352505A1 Method for the production of thymol |
01/23/1990 | US4895988 Process for the mutual condensation of aromatic and carbonylic compounds |
01/23/1990 | US4895755 Halogenated advanced epoxy resins |
01/23/1990 | CA1264764A1 Process for producing aromatic diols and their ether derivatives |
01/17/1990 | EP0350842A2 Pyramidal liquid crystals |
01/17/1990 | EP0350699A2 Process for puryfying dihydric phenols |
01/17/1990 | EP0350695A2 Process and composition for inhibiting dihydric phenol degradation and colour quality reduction |
01/16/1990 | US4894487 Preparation process of 4-(4-hydroxyphenyl)-cyclohexanol |
01/16/1990 | US4894486 Lactic acid, glyceric acid, malic acid |
01/10/1990 | EP0350344A1 Layered intercalated metal oxides, and process for their preparation |
01/09/1990 | CA1264333A1 Butylated and octylated dialkyldiphenylamine |
01/03/1990 | EP0349382A1 Process for purifying dihydroxybiphenyls |
01/03/1990 | EP0173748B1 Process for producing substituted unsaturated six-membered ring compounds from phenol derivatives |
01/02/1990 | US4891465 Process for producting alkyl group-substituted aromatic hydrocarbons |
01/02/1990 | US4891453 Dealkylation of 3,3',5,5'-tetra-tert-butylanalog |
01/02/1990 | US4891452 Catalytic hydroxylation of bromobiphenyls |
01/02/1990 | US4891448 Acidic mordenite catalyst |
12/27/1989 | EP0347835A2 Process for preparing aryl-ethyl phenols having one or more alkyl substituents in the ethyl group and their use |
12/27/1989 | EP0347710A2 Phenol alkylation process |
12/27/1989 | EP0347709A1 Phenol alkylation process |
12/21/1989 | DE3820192A1 Process for the preparation of 4,4'-dihalobiphenyls |
12/20/1989 | EP0346913A2 Process for the synthesis of phenyl substituted aromatic diols |
12/20/1989 | EP0346593A1 Process for preparing 4,4'-dihydroxybiphenyl |
12/14/1989 | WO1989012037A1 Process for the preparation of (arylethyl)hydroquinones and diesters thereof |
12/13/1989 | EP0346250A1 Process for the hydroxylation of phenols and phenol ethers |
12/13/1989 | CN1037891A Process for preparing high purity biphenol a |
12/13/1989 | CN1037890A Process for preparing biphenol a |
12/12/1989 | US4886927 Process for isomerization of alkylaromatics |
12/12/1989 | US4886891 Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative |
12/07/1989 | DE3911247A1 Process for recovering phenols from their mixtures |
12/05/1989 | US4885408 Chlorination of ortho-substituted phenols |
12/05/1989 | US4885407 Method for recovering a dihydric phenol from a scrap polyester |
12/05/1989 | US4885406 Hydrocarbon-soluble complexes of magnesium alkoxides with magnesium aryl oxides |
11/29/1989 | EP0343798A1 Preparation of aromatic compounds and derivatives thereof |
11/29/1989 | EP0343382A1 Method for the production of bis-phenols |
11/29/1989 | EP0343349A1 Process for obtaining high-purity bisphenol A |
11/23/1989 | EP0342758A1 Preparation of bisphenols |
11/22/1989 | CN1037328A Process for producing 2,2-bis (4-hydroxyphenyl) propane |