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Class Information
Number: 203/76
Name: Distillation: processes, separatory > Plural distillations performed on same material > One a distillation under positive pressure or vacuum > Distillation of initial distillate > 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 |
| 7594979 |
Purification of propylene oxide resulting from epoxidation of propylene with hydrogen peroxide |
Sep. 29, 2009 |
| 7074971 |
Recovery of ethylene and propylene from a methanol to olefin reaction system |
Jul. 11, 2006 |
| 6500311 |
Propylene oxide purification |
Dec. 31, 2002 |
| 6299734 |
Preparation of an aqueous solution of free hydroxylamine |
Oct. 9, 2001 |
| 6214172 |
Preparation of methylglyoxal dimethyl acetal |
Apr. 10, 2001 |
| 6210583 |
Spent caustic pretreatment and enhanced oxidation process |
Apr. 3, 2001 |
| 5885422 |
Spent caustic (pre)treatment process |
Mar. 23, 1999 |
| 5866721 |
Process for separating the product gas mixture from the catalytic synthesis of methyl mercaptan |
Feb. 2, 1999 |
| 5779861 |
Method for treating process condensate |
Jul. 14, 1998 |
| 5718810 |
Methanol recovery using extractive distillation |
Feb. 17, 1998 |
| 5643420 |
Method for treating process condensate |
Jul. 1, 1997 |
| 5626724 |
Recovery of N-ethylpiperazine by distillation |
May. 6, 1997 |
| 5587047 |
Method for separating boric acid |
Dec. 24, 1996 |
| 5529667 |
Process for recovering ethylene oxide |
Jun. 25, 1996 |
| 5468347 |
Method for separating boric acid |
Nov. 21, 1995 |
| 5385646 |
Method of treating chemical process effluent |
Jan. 31, 1995 |
| 5348624 |
Process for separating ethyl tert-butyl ether and ethanol |
Sep. 20, 1994 |
| 5264117 |
Distillation of hydrocarbons |
Nov. 23, 1993 |
| 5250156 |
Method of separating ethyl tertiobutyl ether from mixtures with ethanol |
Oct. 5, 1993 |
| 5167773 |
Distillation tower and sidestream stripper therefor |
Dec. 1, 1992 |
| 5131984 |
High quality phenol rectification with energy recovery |
Jul. 21, 1992 |
| 5028735 |
Purification and preparation processes for methyl methacrylate |
Jul. 2, 1991 |
| 4966657 |
Process for separating ethylene oxide from aldehyde impurities by distillation |
Oct. 30, 1990 |
| 4652343 |
Process for the separation of mixtures of paraffin or respectively paraffins of 6-14 carbon atoms and alcohol or respectively alcohols of 4-8 |
Mar. 24, 1987 |
| 4595461 |
Process for the non-degenerative distillation of fatty acids |
Jun. 17, 1986 |
| 4566947 |
Method of separating a mixed liquid into light and heavy fractions by distillation |
Jan. 28, 1986 |
| 4522920 |
Production of ethanol |
Jun. 11, 1985 |
| 4468257 |
Washing and removal method of high molecular substances |
Aug. 28, 1984 |
| 4448644 |
Method of producing ethanol-water azeotrope from crude ethanol |
May. 15, 1984 |
| 4436902 |
Removal of contaminants in liquid purification |
Mar. 13, 1984 |
| 4360406 |
Process for the preparation of tertiary butyl alcohol |
Nov. 23, 1982 |
| 4358536 |
Production of ethanol |
Nov. 9, 1982 |
| 4347385 |
Process for the separation of sulfur compounds from water |
Aug. 31, 1982 |
| 4309254 |
Alcohol recovery process |
Jan. 5, 1982 |
| 4308109 |
Method of producing ethanol-water azeotrope from crude ethanol |
Dec. 29, 1981 |
| 4302298 |
Process for isolating methyl tert-butyl ether from the reaction products of methanol with a C.sub.4 hydrocarbon cut containing isobutene |
Nov. 24, 1981 |
| 4269667 |
Acrylonitrile purification by extractive distillation |
May. 26, 1981 |
| 4233281 |
Recovery of hydrogen fluoride from metallic fluoride salts |
Nov. 11, 1980 |
| 4009230 |
Device for vacuum treatment of liquids by means of a gaseous strip-medium |
Feb. 22, 1977 |
| 3956074 |
Recovery of methylglyoxal acetal by plural stage distillation with intermediate phase separation |
May. 11, 1976 |
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