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Class Information
Number: 203/79
Name: Distillation: processes, separatory > Plural distillations performed on same material > One a distillation under positive pressure or vacuum > Including the addition of water or steam
Description: Processes directed to adding water or steam to at least one distillation operation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7601245 |
Process for reducing the aldehyde concentration in a mixture comprising cyclohexanone and one or more aldehydes |
Oct. 13, 2009 |
| 7594979 |
Purification of propylene oxide resulting from epoxidation of propylene with hydrogen peroxide |
Sep. 29, 2009 |
| 7527712 |
Method for the continuous purification by distillation of the solvent methanol, used in the synthesis of propylene oxide |
May. 5, 2009 |
| 7449088 |
Process for obtaining fatty acids with improved odor, color and heat stability |
Nov. 11, 2008 |
| 7416644 |
Method and device for stripping ammonia from liquids |
Aug. 26, 2008 |
| 7416645 |
Continuous process for recovering acetone from a waste stream resulting from acetone purification |
Aug. 26, 2008 |
| 7309403 |
Method for avoiding corrosion |
Dec. 18, 2007 |
| 6982026 |
Azeotropic distillation process for producing organic acids or organic acid amides |
Jan. 3, 2006 |
| 6969446 |
Method for producing concentrated nitric acid and installation for carrying out a method of this type |
Nov. 29, 2005 |
| 6955743 |
Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
Oct. 18, 2005 |
| 6843890 |
Purification and recovery of acetonitrile from waste solvent acetonitrile |
Jan. 18, 2005 |
| 6821382 |
Method and arrangement for cleaning contaminated condensate including a combined stripper/condenser |
Nov. 23, 2004 |
| 6780289 |
Process for the purification and recovery of acetonitrile |
Aug. 24, 2004 |
| 6758946 |
Recycling hydroxylamine-containing stripper solutions |
Jul. 6, 2004 |
| 6706153 |
Process for the separation of a ketoxime or aldoxime from an amide |
Mar. 16, 2004 |
| 6685802 |
Process and apparatus for removing dissolved and undissolved solids from liquids |
Feb. 3, 2004 |
| 6635151 |
Lactam dehydration method |
Oct. 21, 2003 |
| 6623604 |
Method of recovering free fatty acids having low ester content and high acid value |
Sep. 23, 2003 |
| 6605192 |
Method for producing highly pure monoethylene glycol |
Aug. 12, 2003 |
| 6514388 |
Method for producing highly pure monoethylene glycol |
Feb. 4, 2003 |
| 6500311 |
Propylene oxide purification |
Dec. 31, 2002 |
| 6299734 |
Preparation of an aqueous solution of free hydroxylamine |
Oct. 9, 2001 |
| 6258206 |
Process for purifying condensate while evaporating waste liquors |
Jul. 10, 2001 |
| 6217711 |
Method of treating condensates |
Apr. 17, 2001 |
| 6210583 |
Spent caustic pretreatment and enhanced oxidation process |
Apr. 3, 2001 |
| 6139693 |
Method for obtaining hexamethylene diamine from mixtures containing hexamethylene diamine |
Oct. 31, 2000 |
| 5935388 |
Distillation plant with a heat pump |
Aug. 10, 1999 |
| 5885422 |
Spent caustic (pre)treatment process |
Mar. 23, 1999 |
| 5882485 |
Process for the separation of dimethyl ether and chloromethane in mixtures |
Mar. 16, 1999 |
| 5863391 |
Purification of a methanol stream |
Jan. 26, 1999 |
| 5843286 |
Process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with water as extractant |
Dec. 1, 1998 |
| 5837107 |
Process for production of aqueous solutions of free hydroxylamine |
Nov. 17, 1998 |
| 5639355 |
Method for enhancing the yield of tertiary butyl alcohol in a tertiary butyl alcohol recovery process |
Jun. 17, 1997 |
| 5626724 |
Recovery of N-ethylpiperazine by distillation |
May. 6, 1997 |
| 5587047 |
Method for separating boric acid |
Dec. 24, 1996 |
| 5500097 |
Method for removing organic compound in water |
Mar. 19, 1996 |
| 5478443 |
Apparatus for separating biochemical compounds from biological substances |
Dec. 26, 1995 |
| 5468347 |
Method for separating boric acid |
Nov. 21, 1995 |
| 5399244 |
Process to recover benzene from mixed hydrocarbons by extractive distillation |
Mar. 21, 1995 |
| 5374337 |
Halohydrocarbon recovery process |
Dec. 20, 1994 |
| 5348624 |
Process for separating ethyl tert-butyl ether and ethanol |
Sep. 20, 1994 |
| 5264117 |
Distillation of hydrocarbons |
Nov. 23, 1993 |
| 5240566 |
Separation process |
Aug. 31, 1993 |
| 5209826 |
Method of separating sesamin and episesamin |
May. 11, 1993 |
| 5207874 |
Process for the purification of glycidyl (meth)acrylate |
May. 4, 1993 |
| 5122234 |
Preparation of phenol having improved clarity when dispersed in water |
Jun. 16, 1992 |
| 5092964 |
Production of low cholesterol butter oil by vapor sparging |
Mar. 3, 1992 |
| 5004829 |
Method of preparing trifluoromethanesulfonic acid anhydride |
Apr. 2, 1991 |
| 4971661 |
Purification of propylene oxide using an aqueous acetone extractive distillatin agent |
Nov. 20, 1990 |
| 4892624 |
Workup of distillation residues from the purification of caprolactam |
Jan. 9, 1990 |
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