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Class Information
Number: 562/494
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Carboxylic acids and salts thereof > Aromatic > Monocyclic > Purification or recovery per se
Description: Processes directed to the purification, separation, or recovery of aromatic monocyclic monocarboxylic acids.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7569722 |
Process for removal of benzoic acid from an oxidizer purge stream |
Aug. 4, 2009 |
| 7470370 |
Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using pressure filtration |
Dec. 30, 2008 |
| 7402694 |
Process for removal of benzoic acid from an oxidizer purge stream |
Jul. 22, 2008 |
| 7282151 |
Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using pressure filtration |
Oct. 16, 2007 |
| 7253299 |
Process for purifying n2-(1(s)-ethoxycarbonyl-3-phenylpropyl)-n6-thifluoroacetyl-l-lysine |
Aug. 7, 2007 |
| 6777213 |
Isolation of carboxylic acids from fermentation broth |
Aug. 17, 2004 |
| 6660505 |
Isolation of carboxylic acids from fermentation broth |
Dec. 9, 2003 |
| 6642412 |
Process for producing a high purity aromatic polycarboxylic acid |
Nov. 4, 2003 |
| 6639104 |
Process for the recovery of purified terephthalic acid (PTA) |
Oct. 28, 2003 |
| 6548695 |
Process for producing isocoumarins and intermediates for the same |
Apr. 15, 2003 |
| 6491795 |
Process for recovering benzyl benzoate |
Dec. 10, 2002 |
| 6455731 |
Process for producing a high purity aromatic polycarboxylic acid |
Sep. 24, 2002 |
| 6441225 |
Purification of aromatic diacids |
Aug. 27, 2002 |
| 6437179 |
Process for the preparation of fluorogenic phenolic compounds |
Aug. 20, 2002 |
| 6437176 |
Method for preparing aromatic carboxylic acids, aromatic aldehydes, and aromatic alcohols |
Aug. 20, 2002 |
| 6403828 |
Method of refining crystalline material |
Jun. 11, 2002 |
| 6399790 |
Method for oxidation of xylene derivatives |
Jun. 4, 2002 |
| 6344568 |
Catalyst for gas phase partial oxidation |
Feb. 5, 2002 |
| 6342636 |
Process for preparing optically active amines and optically active carboxylic acids, and intermediates for preparation |
Jan. 29, 2002 |
| 6307091 |
Trifluoro-substituted benzoic acid, esters thereof and processes for preparing the same |
Oct. 23, 2001 |
| 6254779 |
Treatment of effluent streams containing organic acids |
Jul. 3, 2001 |
| 6255525 |
Process for preparing purified carboxylic acids |
Jul. 3, 2001 |
| 6248797 |
Supercritical carbon dioxide extraction of contaminants from ion exchange resins |
Jun. 19, 2001 |
| 6211404 |
Method of refining benzoic acid |
Apr. 3, 2001 |
| 6160171 |
Trifluoro-substituted benzoic acid, esters thereof, and process for producing the same |
Dec. 12, 2000 |
| 6093830 |
Enantioselective resolution process for arylpropionic acid drugs from the racemic mixture |
Jul. 25, 2000 |
| 5994560 |
Resolution of racemic mixtures using polymers containing chiral units |
Nov. 30, 1999 |
| 5843863 |
Process for improving flow characteristics of crystalline ibuprofen |
Dec. 1, 1998 |
| 5739383 |
Resolution of racemic mixtures using polymers containing chiral units |
Apr. 14, 1998 |
| 5543564 |
Process for releasing acidic organic compounds from salts thereof by carbon dioxide |
Aug. 6, 1996 |
| 5426215 |
Process for converting [R(-)-2(3-benzoylphenyl)-propionic acid to the S(+) isomer] |
Jun. 20, 1995 |
| 5399707 |
Selective precipitation of .alpha.-aryl carboxylic acid salts |
Mar. 21, 1995 |
| 5384413 |
Process for the preparation of tetrafluorophthalic acid and/or tetrafluorophthalic anhydride |
Jan. 24, 1995 |
| 5364962 |
Method for purification of a benzoic acid |
Nov. 15, 1994 |
| 5352825 |
Recovery of organic acid salts from impure process streams by addition of bases |
Oct. 4, 1994 |
| 5352823 |
Process for improving flow characteristics of crystalline ibuprofen |
Oct. 4, 1994 |
| 5336806 |
Purification of 2,4,5-trifluorobenzoic acid |
Aug. 9, 1994 |
| 5324750 |
Compositions and methods for drug delivery and chromatography |
Jun. 28, 1994 |
| 5254714 |
Hydrogenation of aromatic-substituted olefins using organoruthenium catalyst |
Oct. 19, 1993 |
| 5233085 |
Preparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic acid |
Aug. 3, 1993 |
| 5206430 |
Method for obtaining high-purity cinnamic acid |
Apr. 27, 1993 |
| 5175355 |
Improved process for recovery of purified terephthalic acid |
Dec. 29, 1992 |
| 5151551 |
Method for purification of ibuprofen comprising mixtures |
Sep. 29, 1992 |
| 5104492 |
Recovery of carboxylic acids from water by precipitation from organic solutions |
Apr. 14, 1992 |
| 5037512 |
Process for the purification of benzoic acid by distillation with an amine |
Aug. 6, 1991 |
| 5034509 |
Method for improving the color and the stability of the color of carboxylic acid or a mixture of the same |
Jul. 23, 1991 |
| 5011987 |
Process for manufacturing high-purity o-toluic acid |
Apr. 30, 1991 |
| 4970336 |
Method of purifying .alpha.-substituted acetic acids |
Nov. 13, 1990 |
| 4894482 |
Process for drying hydrogen fluoride-carboxylic acid mixtures |
Jan. 16, 1990 |
| 4855292 |
1-cyclopropyl-6-fluoro-8-alkyl-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid derivatives |
Aug. 8, 1989 |
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