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Class Information
Number: 568/749
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
Description: Processes which include separating the phenol from impurities or from the reaction mixture.

Sub-classes under this class:

Class Number Class Name Patents
568/760 From ammoniacal liquor 3
568/750 From mixture of phenols 89
568/761 From oil or tar derived from fossil fuel or wood 26
568/759 From substance which includes sulfur or a sulfur containing compound 19
568/757 Nitrogen or phosphorus containing compound utilized 15
568/755 Of halogen containing phenol 39
568/756 Of phenol having acyclic polycarbon hydrocarbyl group bonded directly to the benzene ring 46
568/754 Of phenol prepared by cleavage of hydroperoxide or other peroxide 111
568/753 Of polyhydroxy phenol 69
568/758 Sorbent material utilized 31

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8628849 Method for preparing purified pyrocatechol Jan. 14, 2014
8558031 Method for high efficiency salt removal from phenol process byproducts Oct. 15, 2013
8507732 Purification of tris-hydroxyaryl compounds Aug. 13, 2013
8389776 Treatment of phenol Mar. 5, 2013
8283501 Optically active 2,2'-biphenol derivative and production method of same Oct. 9, 2012
8257557 Dehydration method Sep. 4, 2012
8088956 BPA process improvement Jan. 3, 2012
8044248 Treatment of bisphenol-A residue streams Oct. 25, 2011
7989666 Method for preparing bisphenol A Aug. 2, 2011
7977516 Process of obtainment of trans-resveratrol and/or emodin and nutraceutical compositions containing them Jul. 12, 2011
7902408 BPA process improvement Mar. 8, 2011
7858830 Process for recovering phenol from a BPA waste stream Dec. 28, 2010
7851514 Process for producing regenerated resin, regenerated resin, processing recovered matter from resin composition, regenerated resin composition and method of regenerating resin composition Dec. 14, 2010
7795459 Paricalcitol purification Sep. 14, 2010
7759527 Microwave induced one pot process for the preparation of arylethenes Jul. 20, 2010
7586013 Method for preparing hydroxystyrenes and acetylated derivatives thereof Sep. 8, 2009
7541417 Process for the purification of dihydric phenols Jun. 2, 2009
7528210 Method of purification of dihydric phenols May. 5, 2009
7435319 Process for the mild distillative separation of mixtures Oct. 14, 2008
7371324 Chemical process May. 13, 2008
7355082 Method of purifying long-chain alkyl phenols and Mannich adducts thereof Apr. 8, 2008
7301056 Process for the separation of phenol from phenol-containing streams from the preparation of Bisphenol A Nov. 27, 2007
7244772 Process for preparing polyurethane polyol and rigid foams therefrom Jul. 17, 2007
7205442 Method of making high purity phenol Apr. 17, 2007
7109384 Process to extract phenolic compounds from a residual plant material using a hydrothermal treatment Sep. 19, 2006
7102036 Process and catalyst for purifying phenol Sep. 5, 2006
7067704 Process for purifying bisphenol-a Jun. 27, 2006
7034192 Method for removal of acetol from phenol Apr. 25, 2006
7002047 Biocatalytic synthesis of quinic acid and conversion to hydroquinone Feb. 21, 2006
6984761 Co-production of phenol, acetone, .alpha.-methylstyrene and propylene oxide, and catalyst therefor Jan. 10, 2006
6972345 Extraction of phenol-containing effluent streams Dec. 6, 2005
6964728 Separation process Nov. 15, 2005
6844472 Method and installation for separating and purifying diphenols in the phenol and phenol derivatives industry Jan. 18, 2005
6600004 Method of preparing polyestercarbonates Jul. 29, 2003
6600077 Biocatalytic synthesis of quinic acid and conversion to hydroquinone Jul. 29, 2003
6596908 Process for the recovery of low molecular weight phenols, furfural, furfuryl alcohol and/or cellulose or cellulose-rich residues Jul. 22, 2003
6586638 Process for removing and recovering of phenolic compounds from aqueous fluids Jul. 1, 2003
6586639 Functional alcohol releasing substance Jul. 1, 2003
6576801 Process for the neutralization of residual acid species in crude dihydric phenols Jun. 10, 2003
6489518 Process for reducing the salt content of fractions comprising high boilers obtained in the preparation of phenol from cumene, by extraction Dec. 3, 2002
6489519 Process for removal of impurities from phenol by means of at least one acid catalyst Dec. 3, 2002
6486365 Production and purification of phenol: hydroxyacetone removal by hydrotalcite Nov. 26, 2002
6414106 Process for the neutralization of residual acid species in crude dihydric phenols Jul. 2, 2002
6388144 Method for reducing methylbenzofuran levels in high purity phenol May. 14, 2002
6372021 Extractive removal of methanol from cumene-to-phenol process vent gas Apr. 16, 2002
6307111 Method for continuous production of dihydroxydiarylalkanes Oct. 23, 2001
6294702 Method for continuous production of dihydroxydiphenylalkanes Sep. 25, 2001
6258985 Method for removing metal ions from cresol mixtures Jul. 10, 2001
6258901 Process for producing lightly colored p-vinylphenol polymer Jul. 10, 2001
6184367 Process for the production of 4-aryl-2 butanols from Taxus wallichiana Feb. 6, 2001

1 2 3 4

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