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)
12/1990
12/13/1990CA2018959A1 Tetrahydro-5,6,7,8 naphtalenol-1 derivatives, process for their preparation and use as antioxidant in cosmetic compositions and pharmaceutical products containing same
12/05/1990EP0400773A2 Condensate of a polyhydric phenol with an aldehyde and the preparation and use thereof
12/05/1990EP0400171A1 Countercurrent multi-stage water crystallization for aromatic compounds
11/1990
11/30/1990CA2017830A1 Preparation of phenylhydroquinone
11/27/1990US4973766 Solvent extraction with alkali metal phenate
11/27/1990US4973764 Using acid catalyst
11/27/1990US4973758 Process for the preparation of 1,5-dihydroxynaphthalene and 1,5-diaminonaphthalene
11/20/1990CA1276652C Phenolic compound chlorination process
11/14/1990EP0397277A2 Modified bisphenols
11/14/1990CN1046891A Technology of extracting cotton phenol
11/13/1990CA1276183C Process for the preparation of di-ortho-substituted di-meta-halogenatedpara-halomethylphenols
11/09/1990CA2016185A1 Modified bisphenols
11/06/1990US4968759 Alkylation polymerization of phenol with bis(hydroxyalkyl)benzene followed by alkylation of ortho or para position
10/1990
10/31/1990EP0394949A2 Process for producing allylsubstituted phenol compound and the product
10/31/1990EP0394682A1 Method of ortho-alkylating phenol
10/23/1990US4965384 Reacting a copper halide and tetramethylenediamine in the presence of an acidic phenol
10/23/1990US4965361 Preparation of 4-substituted aryl olefins
10/18/1990WO1990012776A1 A process for synthesising 9,9-bis(4-hydroxyphenyl) fluorene
10/18/1990CA2030539A1 Process for synthesizing 9,9-bis-(4-hydroxyphenyl)fluorene
10/10/1990EP0390945A1 Process for preparing 4,4'''-dihydroxyquater-phenyl or derivatives thereof
10/10/1990CN1045966A Monomer containing hexafluorisopropyl, processes thereof and application
10/09/1990US4962273 Zeolites
10/09/1990US4962241 Process for producing dihydroxynaphthalenes
10/09/1990US4962240 Method for symmetrically dimerizing phenols and process for producing biphenols
10/09/1990US4962192 Chemiluminescent 1,2-dioxetane compounds
10/09/1990US4961922 Complexes based on anthralin and a sterol, a process for obtaining them and their use in therapeutics and cosmetics
10/03/1990EP0389961A1 Monomerides containing the hexafluoroisopropyl group, process for their preparation and their use
10/02/1990US4960958 Catalysts for catalytic pyrolysis of phenol distillation residue and process for recovering useful substances by pyrolysis the same
10/02/1990US4960957 Preparation of phenylhydroquinone
10/02/1990US4960956 Alkylating in the presence of a friedel crafts catalyst
09/1990
09/26/1990EP0389056A1 Preparation of fluorophenols
09/26/1990EP0203195B1 Fluorine-substituted phenyl benzoates and process for their prep aration
09/25/1990US4959182 Method and compositions providing enhanced chemiluminescence from 1,2-dioxetanes
09/25/1990CA2012918A1 Hexafluoroisopropyl-containing monomers, process for their preparation and their use
09/20/1990CA2011293A1 Preparation of fluorophenols
09/19/1990EP0388322A1 Preparation of 4-substituted aryl olefins
09/18/1990US4957642 Magnesium phenate detergents
09/12/1990EP0387080A1 Alkylation of organic aromatic compounds
09/12/1990EP0386639A1 Process for preparing para-hydroxybenzyl alcohol
09/12/1990CN1045258A Preparation for alpha-methyl benzyl phenol
09/10/1990CA2011858A1 Alkylation of organic aromatic compounds
09/05/1990EP0385882A1 Method for the hydroxylation of phenols and phenol ethers
09/04/1990US4954662 Selective chlorination of ortho-substituted phenols
09/04/1990US4954653 Catalyst on the basis of silicon and titanium having high mechanical strength and a process for its preparation
09/04/1990US4954603 Epoxy resin
09/04/1990US4954475 Zinc-containing ortho-alkylation catalyst precursor and catalyst, and process of use in alkylation of phenols
09/04/1990CA1273630A1 Deprotection of allylic esters and ethers
08/1990
08/31/1990CA2007932A1 Process for hydroxylating phenols and phenol ethers
08/29/1990EP0246272B1 Silica-titania hydrocarbon conversion catalyst
08/28/1990WO1990009973A1 Preparation of 4-substituted aryl olefins
08/28/1990CA2046643A1 Preparation of 4-substituted aryl olefins
08/28/1990CA1273364A1 Process for dimerization of aromatic halide compounds
08/21/1990US4950817 Process for the preparation of 4,4'-dihalobiphenyls
08/21/1990US4950810 Olefin substitutions in presence of phosphorus containing compound
08/21/1990US4950809 Process for preparing hydroxylated aromatic derivatives by the Baeyer-Villiger reaction
08/21/1990US4950808 Process for the preparation of 4,4'-dihydroxybiphenyl
08/21/1990US4950807 Reacting phenol with acetone
08/21/1990US4950806 Controlling concentration of bisphenol a by adjusting phenol
08/21/1990US4950805 Process for washing and obtaining solids of slurry
08/21/1990US4950804 Process for preparing bisphenol A
08/15/1990CN1009196B Process for producing orthoalkylphenols
08/07/1990US4946877 Adding water-containing phenol which recover from dehydrochlorination to reaction mixture containing phenol and acetone
08/07/1990US4946653 Process for the simultaneous classification and regulated, continuous discharge of particulate material from fluidized bed reactors
08/07/1990CA1272489A1 Process for the condensation of carbonyl and aromatic compounds
08/01/1990EP0380363A2 Process for producing tetrabromobisphenol A
08/01/1990EP0379862A2 Method for the purification of crude 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane
08/01/1990EP0379716A1 Chemiluminescent 1,2-dioxetane compounds
08/01/1990EP0305774B1 Ion exchange resin modified by thiazolines
08/01/1990EP0278211B1 Process for the manufacture of p-substituted o-benzylphenols
07/1990
07/25/1990EP0379083A1 Method of extracting phenols from aqueous solutions
07/19/1990CA2006232A1 Extraction of phenols from aqueous solutions
07/18/1990EP0377638A1 Process for the iodination of hydroxyaromatic and aminoaromatic compounds.
07/17/1990US4942269 Process for fractionating fast-pyrolysis oils, and products derived therefrom
07/17/1990US4942265 Washing a phenol adduct of bisphenol a with phenol, deetherification, distillation, steam stripping, washing
07/12/1990WO1990007511A1 Enhanced chemiluminescence from 1,2-dioxetanes through energy transfer to tethered fluorescers
07/12/1990WO1990007480A1 Acid catalyzed process
07/12/1990DE3900629A1 Process for the purification of crude phenol
07/10/1990US4940821 Preparation of fluorophenols
07/10/1990CA1271492A1 Process for producing 2,6-dihydroxynaphthalene
07/03/1990US4939306 Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor
06/1990
06/27/1990EP0374692A2 Use of hydroxycarboxylic acids as stabilizers for bisphenols
06/27/1990EP0374379A1 Process for the simultaneous dealkalization and desulphurization of phenols
06/26/1990US4937392 Process for preparing 4,4'-dihydroxydiphenylmethane
06/22/1990CA2006360A1 Stabilizer for bisphenols and process of using same
06/20/1990EP0373730A1 Process for purifying bisphenols
06/20/1990EP0373728A1 Process for continuous purification of bisphenols
06/20/1990EP0373668A2 A process for the synthesis of ortho-methylated hydroxyaromatic compounds
06/20/1990CN1043120A Preparation of cumene through alkylation of aromatic compound and preparation phenol through cumene
06/20/1990CN1043119A Process for recovering phenols from a rectification purge
06/20/1990CN1043096A Basic metal-zeolite compositions, their preparation and use in base catalyzed reactions
06/19/1990US4935553 Process for preparing bisphenol A
06/19/1990US4935173 Process for producing prills
06/19/1990CA2004601A1 Process for the simultaneous removal of bases and sulphur from phenois
06/13/1990EP0372685A2 Process for recovering phenol
06/13/1990EP0372282A2 Process for the preparation of 1,5-dihydroxy and 1,5 diaminonaphthalene
06/13/1990EP0371995A1 Process for producing phenylhydroquinones.
06/13/1990CN1042897A Alkylation of polycyclic aromatic compounds to alkylates enriched in para-substituted isomers
06/12/1990US4933509 Using surface treated magnesium oxide catalyst
06/12/1990US4933507 Method of dehydrogenating cyclohexenone
06/12/1990US4933506 Process for the production of dihydric phenols
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