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)
05/1992
05/05/1992US5110994 Catalytic condensation of fluorenone with phenol
05/05/1992US5110983 Hexafluoroisopropyl-containing monomers, process for their preparation and their use
05/05/1992CA1300156C Process for the iodination of hydroxyaromatic and aminoaromatic compounds
04/1992
04/30/1992WO1992007052A1 Process for preparing alkyl phenol-sulfur condensate lubricating oil additives (pt-790)
04/30/1992WO1992006936A1 Preparation of linear alkyl aromatics (pt-808)
04/22/1992EP0481287A2 Method for the production of substituted cyclohexylidenebisphenols
04/21/1992US5107049 Alkylating aromatic hydrocarbon with olefinic oligomer; zeolite catalyst; heat and oxygen resistant lubricants
04/21/1992US5107035 Process for high purity tetrabromobisphenol-A
04/15/1992EP0480800A1 Process for hydroxylating of phenolic compounds
04/15/1992EP0480658A2 Phenolic resins
04/15/1992EP0480308A1 Method for separating resorcinol from resorcinol precondensates
04/15/1992EP0480237A1 Particular dihydroxydiphenylbicycloalkanes, their preparation and their use for the preparation of high molecular polycarbonates
04/14/1992US5105029 Process for recovering a lower alcohol from a catechol-lower alcohol reaction product solution
04/14/1992US5105027 Condensation of phenol with acetone
04/14/1992US5105026 Process for preparing a bisphenol
04/14/1992US5104939 Polymer mixture which comprises a polyamide, a polyphenylene ether and an agent to improve the impact strength
04/09/1992CA2052904A1 Process for the removal of resorcinol from resorcinol precondensates
04/08/1992EP0479292A1 Process for producing aromatic hydroxy compound
04/08/1992CN1060088A Method of purifying bisphenol-a
04/07/1992US5102962 Phenolic polymer and production thereof
04/01/1992EP0478311A2 Preparation of 6-Substituted 2-Vinylnaphthalene
03/1992
03/27/1992CA2052185A1 Preparation of 6-substituted-2-vinylnaphthalene
03/25/1992EP0476608A1 Substituted phenols
03/25/1992EP0476493A1 Acyclic tocotrienol analogs in the treatment of hypercholesterolemia and hyperlipidemia
03/24/1992US5099076 Method for preparing p,p'-biphenol
03/24/1992US5098945 Stabilizers for organic materials against heat, oxidation and actinic degradation
03/24/1992US5098879 Catalyst for preparation of ortho-alkylated phenols
03/24/1992US5098531 Electrochemical synthesis of 2-aryl-hydroquinones
03/18/1992EP0475893A1 Method of purifying bisphenol-A
03/18/1992EP0475629A1 Process for the purification of 4-acetoxystyrene
03/17/1992US5097080 By debutylation of tetra-tertiary butyl dihydroxybiphenyl in solvent using acid catalyst
03/17/1992US5097079 Zinc-containing ortho-alkylation catalyst precursor and catalyst, and process of use in alkylation of phenols
03/17/1992US5097078 Catalytic hydroxylation of phenols/phenol ethers
03/17/1992CA1297487C Preparation of hydrocarbyloxymagnesium halides
03/15/1992CA2050514A1 Acyclic tocotrienol analogs in the treatment of hypercholesterolemia and hyperlipidemia
03/11/1992EP0474303A1 Process for the preparation of cyclopentane derivatives and intermediates therefor
03/11/1992EP0474302A1 Cyclohexenol derivatives
03/10/1992US5095144 Process for dimerizing aromatic halogen compound
03/10/1992US5094722 Distillation, melt crystallization
03/05/1992WO1992003400A1 Method of crystallizing bisphenol a having phenol added thereto
03/05/1992WO1992003399A1 Method of preparing bisphenol a
03/03/1992US5093514 Base-catalyzed dehydration of substituted cis-1,2-dihydroxycyclohexa-3,5-dienes
03/01/1992CA2049241A1 Process for the purification of 4-acetoxystyrene
02/1992
02/26/1992EP0472395A1 Process for producing tetrabromobisphenol A.
02/25/1992US5091594 Process for the production of 2,6-di-tert-butylphenol
02/25/1992US5091592 Process for preparing 4,4'-dihydroxybiphenyl
02/25/1992US5091591 Ammonium, alkali, alkaline earth metal or zinc salt of aliphatic mono ro dicarboxalic acid as stabilizers
02/25/1992US5091499 Process for preparing phenolic formaldehyde resole resin products derived from fractionated fast-pyrolysis oils
02/25/1992US5091058 Reacting excess of phenol with alpha-methyl styrene in presence of acid catalyst; neutralization
02/19/1992EP0471498A2 Optical resolution method
02/12/1992EP0470669A2 Preparation of fluorophenols, fluorohalophenols, N-acylfluoroanilines, and N-acylfluorohaloanilines
02/11/1992US5087772 Reacting 4-acetoxystyrene with an alcohol in presence of a basic catalyst
02/11/1992US5087771 Process for the purification of monotertiarybutyl hydroquinone
02/11/1992US5087769 Preparation of 6-substituted-2-vinylnaphthalene
02/11/1992US5087768 Esterification, crystallization and recovering biphenyl diester and converting diester to dihydroxybiphenyl
02/11/1992US5087767 From acetone and phenol, removing water generated with pervaporation with selectively water permeable membrane
02/11/1992US5087766 Reacting phenol with allyl halide; claisen rearrangement
02/07/1992CA2048286A1 Optical resolution method
02/05/1992EP0470000A1 Allylation reagent and method of synthesis using it
02/05/1992EP0469689A2 Process for the production of a bisphenol
01/1992
01/29/1992EP0468477A1 Process for producing dihydric phenols
01/27/1992CA2047629A1 Process for producing dihydric phenols
01/23/1992WO1992000943A1 Process for purifying bisphenol-a
01/22/1992EP0467847A1 Polyarylene ether with tetraphenylethylene units
01/22/1992CN1058014A Polymerizable antioxidant and olefin polymers containing bound antioxidant
01/21/1992US5082978 With p-dimethoxybenzene and acid catalyst
01/21/1992CA2047381A1 Polyarylene ethers containing tetraphenylethylene units
01/15/1992EP0466545A1 Zeolites based on silica and oxides of tetravalent elements, method for their synthesis and their use
01/15/1992EP0466263A2 Polymerizable antioxidant and olefin polymers containing bound antioxidant
01/15/1992EP0370054B1 Catalyst composition and method for selective dehydrogenation
01/14/1992US5081249 From gaseous fluorine and solution of pyridinesulfonate
01/14/1992US5081087 Olefin polymerization catalysts
01/14/1992US5080871 Apparatus for alkylation of organic aromatic compounds
01/11/1992CA2046487A1 Polymerizable antioxidant and olefin polymers containing bound antioxidant
01/08/1992EP0464472A2 Partially fluorinated biphenyls, method of making them and their application
01/08/1992EP0464154A1 Alkylation of aromatics.
01/02/1992EP0287675B1 Process for producing biphenols
12/1991
12/27/1991EP0259450B1 Process for the preparation of tribromotetramethylbiphenol and related compounds
12/24/1991USRE33779 Preparation process of 4,4-dihydroxybiphenyl
12/24/1991US5075511 Process and alkylmercaptoamine catalyst for production of bisphenol-A
12/24/1991US5075496 Manufacture of 2,6-hydroxynaphthoic acid
12/18/1991CN1015104B Deprotection of allylic esters and ethers
12/17/1991US5073360 Bridge/lamellar metallic oxides
12/17/1991CA1293266C Synthesis of (1-phenyl-ethyl) hydroquinone
12/17/1991CA1293265C Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor
12/12/1991WO1991018858A1 Process for para-methylolating phenolic compound
12/11/1991EP0460240A1 Catalyst for hydrogenation, dehydrosilylation or hydrosilylation, and its use
12/11/1991EP0452411A4 Acid catalyzed process
12/10/1991US5072055 Dealkylated in ortho position
12/10/1991US5072054 Alkylating phenolic compound with olefin, alcohol, or alkyl ha lide using synthetic porous crystalline catalyst having specif ic X-ray diffraction pattern
12/10/1991US5072017 Process for the preparation of p-substituted o-benzylphenols
12/04/1991EP0459572A2 Process for purifying phenol
12/04/1991EP0459267A2 Process for the preparation of pure 4,4'-dihydroxybiphenyl
12/04/1991EP0458965A1 Process for the preparation of vinyl ethers.
12/04/1991CN1056679A Method of extracting fresh-keeping agent from tea
12/03/1991US5070118 Radiation-self-sensitized silicone polymers
12/02/1991CA2043721A1 Process for purifying phenol
11/1991
11/27/1991EP0458684A1 Reagent and process for the perfluoroalkylation of nucleophilic substrates by sodium perfluoroalkanesulfinates in an oxidising medium
11/26/1991US5068463 Oxidative bromination of alkylidinediphenols with a bromination agent and hydrogen peroxide in the presence of a solvent
11/26/1991US5068455 3-(2-hydroperoxy-2-propyl)phenol and method of producing resorcinol using the same
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