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Class Information
Number: 568/755
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Hydroxy containing (h of -oh may be replaced by a group ia or iia light metal) > Benzene ring containing > Phenols (h of -oh may be replaced by a group ia or iia light metal) > Purification or recovery > Of halogen containing phenol
Description: Processes wherein the compound separated contains halogen.

Patents under this class:

Patent Number Title Of Patent Date Issued
8283501 Optically active 2,2'-biphenol derivative and production method of same Oct. 9, 2012
7696389 Method for reducing microcontaminants during synthesis of pentachlorophenol Apr. 13, 2010
7446235 Method for reducing microcontaminants during synthesis of pentachlorophenol Nov. 4, 2008
6586638 Process for removing and recovering of phenolic compounds from aqueous fluids Jul. 1, 2003
5847236 Process for the preparation of 2-chloro-4-methylphenol Dec. 8, 1998
5696302 Highly concentrated aqueous tribromophenolate solution and a method for preparing the same Dec. 9, 1997
5395994 Method for recovering methanol solvent Mar. 7, 1995
5196617 Method of hydrodehalogenating halogenated organic compounds in aqueous environmental sources Mar. 23, 1993
5177268 Hydrodehalogenation of aromatic compounds Jan. 5, 1993
5124490 Removal of acids from phenol using anionic exchange resins Jun. 23, 1992
5118876 Separation of dichlorophenol isomers with zeolite adsorbents Jun. 2, 1992
4864065 Process for removing halogenated hydroxyaromatics from aqueous solutions Sep. 5, 1989
4855053 Extraction of organic compounds from aqueous solutions Aug. 8, 1989
4822922 Stabilization of mixtures of chlorination of phenol/chlorophenols Apr. 18, 1989
4605791 Process for purification of technical grade pentachlorophenol Aug. 12, 1986
4523041 Method of purifying 4-fluorophenol Jun. 11, 1985
4447541 Methods for decontaminating soil May. 8, 1984
4431847 Method for removing brominated phenolic waste Feb. 14, 1984
4429168 Process for separating chlorinated phenols Jan. 31, 1984
4421937 Crystal purification Dec. 20, 1983
4366329 Process for the separation of meta and para isomers of the sodium salt of bromophenol Dec. 28, 1982
4327027 Chemical detoxification of toxic chlorinated aromatic compounds Apr. 27, 1982
4294996 Method of reducing formation of chlorinated dioxins in manufacture of chlorinated phenols Oct. 13, 1981
4288296 Decomposition inhibitors for high temperature storage and distillation of chlorinated phenols Sep. 8, 1981
4280012 Method of removing chlorinated phenol impurities Jul. 21, 1981
4272636 Chlorinated phenol mold release agent Jun. 9, 1981
4228309 Cyclohexane extraction to remove chlorodibenzo-p-dioxins Oct. 14, 1980
4216342 Process for the purification of crude 2,4,5-trichlorophenol Aug. 5, 1980
4160112 Process for the isolation of pentabromophenol Jul. 3, 1979
4147872 3-[2-Hydroxy-4-(substituted)-phenyl]azacycloalkanes and derivatives thereof as analgesic agents and intermediates therefor Apr. 3, 1979
4142943 Method for purifying pentachlorophenol Mar. 6, 1979
4113974 Process for purifying impure diphenols Sep. 12, 1978
4107443 Process for purifying impure diphenols Aug. 15, 1978
4096175 Extraction method Jun. 20, 1978
4067913 Process for the production of 2,5-dichloro-4-bromophenol Jan. 10, 1978
4058457 Recovery of activated carbon Nov. 15, 1977
4016047 Separation and recovery of polychlorinated phenols Apr. 5, 1977
3974084 Process for the manufacture of anhydrous alkali metal arylate solutions and separation of the arylates from alkali metal sulfite Aug. 10, 1976
3931001 Pentachlorophenol recovery with methylene chloride Jan. 6, 1976

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