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)
11/1991
11/26/1991US5068339 Enhanced chemiluminescence from 1,2-dioxetanes through energy transfer to tethered fluorescers
11/26/1991CA1292480C Method of purifying 2,4-xylenol
11/14/1991DE4014992A1 Alkylphenol or bisphenol prodn. - by reacting phenolic material with olefinic or carbonyl cpd. after activation by contact with cation exchanger
11/12/1991US5064518 Method for the selective alpha halogenation of alkylaromatic compounds
11/12/1991US5064507 Amine treatment; a-methyl styrene by-product
11/05/1991CA1291767C Method of oxidizing secondary alkyl substituted naphthalenes and a process of producing isopropylnaphthols
10/1991
10/31/1991WO1991016286A1 PROCESS FOR PRODUCING α-FLUOROSTYROLS
10/31/1991DE4013305A1 Verfahren zur herstellung von (alpha)-fluorstyrol Process for the preparation of (alpha) -fluorstyrol
10/30/1991EP0453949A1 Process for the production of alkyltetrahydroanthrahydroquinone solutions and their use as working solution in the production of hydrogen peroxide by the anthraquinone process
10/30/1991EP0260300B1 Process for the preparation of styrenated hydroquinone
10/26/1991CA2041159A1 Process for producing alkyltetrahydroanthrahydroquinones and working solutions containing them for producing hydrogen peroxide by the anthraquinone process
10/23/1991EP0452695A1 Production of a catalyst and its use for producing phenol
10/23/1991EP0452411A1 Acid catalyzed process
10/23/1991CN1014406B Process for preparing polycarbonate-grade bis phenol a by ion
10/22/1991US5059727 Heating and contacting with an alcohol in a gaseous phase in the presenece of iron oxide, silica, chromium oxide, germanium oxide and an inorganic alkali metal compound catalyst
10/22/1991US5059726 Methanol-water solvent mixture; by-product inhibition
10/22/1991US5059722 Methanol solvent; by-product inhibition
10/22/1991US5059721 Condensation of phenolic compound with carbonyl compound in presence of acidic ion exchange resin catalyst scavenzing acid with carbon absorbent
10/22/1991CA1291171C Process for crystallizing adduct of bisphenol a with phenol
10/22/1991CA1291170C Process for washing and obtaining solids of slurry
10/22/1991CA1291169C Preparation process of 4-(4-hydroxophenyl)- cyclohaxanol
10/22/1991CA1291168C Process for the production of dihydric phenols
10/22/1991CA1291167C Tetrabromobisphenol-a process
10/09/1991EP0450874A2 Overbased calixarates, process for their production, compositions containing them and use as lubricating oil additives
10/09/1991EP0450009A1 Process for manufacturing bisphenols
10/08/1991US5055627 Reacting excess benzene with propylene in distillation column reactor containing fixed bed molecular sieve acidic catalyst; transalkylating polyalkylated benzenes
10/08/1991US5055623 Preparation of phenols by direct N2 O hydroxylation of aromatic substrates
10/02/1991EP0449603A1 Production of 4-hydroxyphenethyl alcohol
10/02/1991CN1054971A Process for refining methyl naphthol at low temp.
10/02/1991CN1014144B Prepn. for bisphenol a
10/01/1991US5053557 Process for preparing 2-chloro-4-fluorophenol
09/1991
09/29/1991CA2036358A1 Production of 4-hydroxyphenethyl alcohol
09/25/1991EP0447977A1 Method for the production of p-alkylcalix[4]arenes
09/24/1991CA1289575C Process for making meta-alkyl phenols
09/10/1991CA1288777C N-fluoropyridinium salt and process for preparing same
09/04/1991EP0445050A1 Method for the production of bisphenol A
09/04/1991EP0444899A2 Catechol derivatives, their physiologically acceptable salts, esters and their use in the treatment of tissue damage induced by lipid peroxidation
08/1991
08/27/1991US5043494 Preparation of methylhydroquinone
08/27/1991US5043483 With acid catalyst and solvent for selective yield of mono-alkylated product
08/27/1991US5043482 New derivatives of 5,6,7,8-tetrahydro-1-naphthalenol, a process for their preparation and cosmetic and pharmaceutical compositions containing them
08/21/1991EP0442122A1 Method for preparing bisphenol A
08/21/1991EP0239643B1 Process for oxidizing 2,6-diisopropylnaphthalene
08/21/1991CN1053918A Purification of 1,1,1-tris (4-hydroxyphenyl) ethane
08/21/1991CN1013552B Process for conducting exothermic reaction
08/20/1991US5041692 Process for alkylation of phenols
08/14/1991EP0441648A1 Purification of 1,1,1-tris(4'-hydroxyphenyl)ethane
08/10/1991CA2034705A1 Purification of 1,1,1-tris(4'-hydroxyphenyl) ethane
08/08/1991WO1991011411A1 Alkylation of aromatics
08/07/1991EP0440390A1 Process for the preparation of bisphenols
07/1991
07/31/1991EP0439083A1 Process for preparing 4,4'-dihydroxybiphenyl
07/31/1991EP0438715A2 1,1-Bicyclo-substituted fluorinated cyclopentanes and method for their production
07/31/1991EP0438641A2 Process for preparing 2,6-di-tert.butylphenol
07/31/1991CN1053423A Method for preparation of phenol
07/31/1991CN1013367B Composition technology of 2-isopropoxy phenol
07/31/1991CN1013366B Process for preparing high purity bisphenol a
07/31/1991CN1013365B Crystal method of bisphenol a/phenol adducts
07/31/1991CN1013364B Preparation method of bisphenol a
07/31/1991CN1013363B Method for bisphenol a prodn
07/31/1991CN1013362B Process for producing hydroxybenzenes
07/30/1991CA2035081A1 Process for the preparation of bisphenols
07/25/1991WO1991010634A1 Nitrogen-containing aromatic heterocyclic ligand-metal complexes and their use for the activation of hydrogen peroxide and dioxygen in the reaction of organic compounds
07/24/1991EP0438329A1 Process for the C-alkylation of hydroquinone and its monoethers
07/24/1991EP0281627B1 Process for reducing aldehydes or ketones
07/20/1991CA2034561A1 Process for the c-alkylation of hydroquinone and its monoesters
07/17/1991EP0332615B1 Process for preparing water clear phenol
07/17/1991CA2034167A1 Nitrogen-containing aromatic heterocyclic ligand-metal complexes and their use for the activation of hydrogen peroxide and dioxygen in the reaction of organic compounds
07/11/1991WO1991009890A1 Resole resins from fractionated fast-pyrolysis oils
07/11/1991WO1991009674A1 Catalyst for hydrogenation, dehydrosilylation or hydrosilylation, and its use
07/10/1991EP0436410A1 Method for the production of substituted hydroxyquinones
07/09/1991US5030770 Process for the preparation of thymol
07/09/1991US5030767 3-(2-hydroperoxy-2-propyl)phenol and method of producing resorcinol using the same
07/03/1991CN1052655A Process and catalyst compostion of alkylating benzene or substituted benzene or transalkylating alkylated benzene
06/1991
06/26/1991EP0434485A1 Method of production of phenol
06/26/1991EP0434140A1 Method for the preparation of a phenol
06/26/1991EP0433932A1 Process of alkylating benzene or substituted benzene or transalkylating alkylated benzene
06/26/1991CN1052478A Lmproved process for preparing vinyl ethers
06/25/1991US5026940 Reacting biphenyl or 4-isopropylbiphenyl with propylene
06/25/1991US5026926 Chlorination of ortho-chlorophenol
06/25/1991US5026925 Hydroxylation of phenol using hydrogen peroxide
06/22/1991CA2032985A1 Process for preparing phenol
06/20/1991CA2032441A1 Method for the preparation of a phenol
06/19/1991EP0432814A1 Process for alkylating benzene
06/19/1991EP0432782A2 Process for preparing 4,4'-dihydroxybiphenyl
06/19/1991EP0432324A1 Isomerization of alkylaromatics
06/15/1991WO1991009002A1 Process for the preparation of vinyl ethers
06/12/1991EP0432006A2 Process for hydroxylating phenols and phenol ethers
06/06/1991CA2031483A1 Process for the preparation of substituted hydroquinones
06/06/1991CA2031482A1 Phenols and phenols esters hydroxylation process
06/05/1991EP0430434A2 Process for the preparation of fluoroaromatic and fluoroheteroaromatic compounds
06/04/1991US5021461 Method of treating diabetes mellitus with bisphenol derivatives
06/04/1991CA1284664C Phenol alkylation process
06/04/1991CA1284663C Phenol alkylation process
06/04/1991CA1284662C Phenol alkylation process
05/1991
05/29/1991EP0429128A2 Olefin polymerization catalysts
05/29/1991DE3939062A1 New aromatic poly:ether-ketone polymers with end gps. - prepd. by reaction of aromatic di:hydroxy cpds. and di:halo cpds. with keto gps.
05/29/1991CN1051736A Olefin polymerization catalysis
05/28/1991US5019670 Alkylation of aromatic compound with olefin hydrocarbon oligomer, porous crystalline acidic alkylation catalyst
05/28/1991US5019669 Alkylation of organic aromatic compounds
05/28/1991US5019657 Process for the preparation of halophenols
05/28/1991US5019656 Process for preparing p-hydroxybenzyl alcohol
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