Patents
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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)
11/1989
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
11/07/1989US4879421 Hydrolysis of diester
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
10/25/1989EP0338898A1 Process for the preparation of an ortho-substituted mono-brominated derivative of phenol
10/24/1989US4876398 Preparation of ortho-alkylated phenols in the presence of a catalyst prepared by co-precipitation process
10/24/1989US4876397 Decomposition over fluorophosphoric acid or hydrogen fluoride on support; by-product inhibition; high yield
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
10/18/1989EP0337890A1 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
10/11/1989CN1036198A 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
10/04/1989EP0335674A2 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
09/1989
09/28/1989DE3809258A1 Process for the preparation of 4,4'-dihalobiphenyls
09/27/1989EP0334195A2 Process for synthesizing hydroxymethyl-dihalo-dialkylphenol
09/27/1989EP0334097A2 Process for the preparation of 4,4'-Dihalogeno-bisphenyls
09/27/1989CN1035819A Process for producing phenol and/or cyclohexanone
09/26/1989US4870217 Acidic smectite catalyst, quantitative conversion
09/26/1989US4870216 Phenol alkylation process
09/26/1989US4870215 Phenol alkylation process
09/26/1989US4870084 Analgesics, antidiarrheals
09/26/1989CA1260920A1 Crystalline magnesia-silica composites and process for producing same
09/26/1989CA1260015A1 Process for production of alkenyl substituted aromatic compound
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
09/13/1989CN1035495A Crystal method of bisphenol/phenol adducts
09/06/1989EP0331173A1 Process for preparing 4,4'-dihydroxydiphenylmethane
09/06/1989CN1035282A Washing process for recovery of solidity from slurry
09/05/1989US4864065 Process for removing halogenated hydroxyaromatics from aqueous solutions
09/05/1989US4863934 Bicyclic benzo fused pyran compounds used for producing analgesia
09/05/1989US4863507 Herbicidal 4-trifluoromethyl-4-nitrodiphenyl ethers
08/1989
08/30/1989EP0330146A1 Process for crystallizing adduct of bisphenol A with phenol
08/29/1989US4861921 Process for manufacture of resorcinol
08/29/1989US4861920 Process for the preparation of 2,6-dihydroxynaphthalene
08/29/1989US4861919 Melting with heat and water, separation of water; low temperature
08/23/1989EP0329075A1 Process for preparing bisphenol A
08/23/1989CN1034916A Process for preparing disphenol a
08/22/1989US4859803 Treatment of phenol with ketone in the presence of cation exchange resin catalyst
08/22/1989US4859785 Catalyst on the basis of silicon and titanium having high mechanical strength
08/16/1989EP0328085A1 Process for producing bisphenol A
08/16/1989EP0327585A1 Alkylphenols and derivatives thereof via phenol alkylation by cracked petroleum distillates
08/15/1989US4857652 Chemiluminescent 1,2-dioxetane compounds
08/15/1989US4857151 Phenol purification
08/15/1989CA1258456A1 Aryl or hetero-aryl derivatives of 1-hydroxy-pentane or 1-hydroxy-hexane for treating inflammation and allergies
08/09/1989EP0327473A2 Process for the preparation of aryl metaborate and its use in the preparation of orthohydroxybenzyl alcohols
08/09/1989EP0327361A1 3-(2-hydroperoxy-2-propyl)phenol and method of producing resorcinol using the same
08/09/1989CN1034531A Method of dehydrogenating cyclohexenone
08/08/1989US4855514 Phenol, iodine source, oxygen react in aqueous medium; heating, pressurization
08/08/1989US4855513 Chlorination of phenolic compounds
08/08/1989US4855512 Dehydration of 1,2-dihydroxy-3-fluorocyclohexa-3,5-diene
08/08/1989US4855053 Extraction of organic compounds from aqueous solutions
08/08/1989CA1258342A1 Preparation of ion-exchange catalysts
08/02/1989EP0325979A1 Process for producing 4,4'-dihydroxy diphenyl
08/02/1989CN1034361A Process for preparing 2,2-bis (4-hydroxyphenyl) propane of high purity
08/02/1989CN1034360A Process for preparing bisphenol a
08/01/1989US4853487 Process for the preparation of hydroxybiphenyls
08/01/1989US4853153 Stabilization of mixtures of chlorination of phenol/chlorophenols
07/1989
07/26/1989CN1034197A Method for bisphenol a prodn.
07/25/1989US4851591 Magnesium-containing catalyst activated under vacuum, in nitrogen, or in air, and use in an ortho-alkylation process
07/25/1989US4851590 Method of purifying 2,4-xylenol
07/25/1989US4851589 Oxidative coupling of alkylphenols by copper catalysts
07/25/1989US4851538 Coupling a haloaromatic compound using carbon monoxide, an alkaline medium and a supported palladium catalyst; efficiency; kinetics
07/25/1989US4851086 Separation with alpha-methylstyrene and methylbenzofurans as by-product impurties
07/19/1989EP0324080A1 A method for the purification of ion exchange resins used in the production of bisphenol A
07/18/1989US4849569 Alkylation of organic aromatic compounds
07/18/1989US4849549 Process for preparation of resorcinol
07/18/1989US4849548 Hydrolysis of halo- and alkyl-substituted phenols
07/18/1989US4849387 Catalyst for the selective decomposition of cumene hydroperoxide and process using it
07/12/1989EP0323831A1 Process for preparing bisphenol A
07/12/1989EP0323712A2 Process for the production of diphenols
07/12/1989EP0323663A2 Exothermic reaction process in a fixed-bed catalytic reactor
07/12/1989CN1033752A Process for conducting an exothermic reaction
07/11/1989US4847437 Oxidation and subsequent decomposition of dihydroperoxide
07/11/1989US4847436 Decomposition of dihydroperoxide to resorcinol
07/11/1989US4847435 Zeolite catalyst
07/11/1989US4847434 Biphenol process
07/11/1989US4847433 Process for preparing bisphenol-A
07/11/1989US4847432 Acid catalysts, condensation
07/11/1989US4847429 Alkylation, acid catalysts, dehydrogenation
07/11/1989CA1257291A1 Process for producing aromatic diols and their ester and ether derivatives
07/05/1989EP0323086A2 Process for preparing detergents
07/05/1989CN1033618A Process for producing phenols
07/04/1989US4845258 Production of gem-disubstituted cyclohexadienones
06/1989
06/28/1989EP0322247A2 Decomposition of dihydroperoxide to resorcinol
06/28/1989EP0322246A1 Oxidation and subsequent decomposition of dihydroperoxide
06/28/1989EP0322245A2 Process for preparation of resorcinol
06/21/1989EP0320936A2 Process for the preparation of para-ethylphenol
06/21/1989CN1033456A Process for production of dihydric phenols
06/20/1989US4841078 Benzopyrans
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