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Class Information
Number: 203/DIG.19
Name: Distillation: processes, separatory > Sidestream
Description:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7449088 |
Process for obtaining fatty acids with improved odor, color and heat stability |
Nov. 11, 2008 |
| 7416645 |
Continuous process for recovering acetone from a waste stream resulting from acetone purification |
Aug. 26, 2008 |
| 7351311 |
Method for purifying tetrahydrofuran by distillation |
Apr. 1, 2008 |
| 7338579 |
Dewatering process |
Mar. 4, 2008 |
| 7329330 |
Method and device for the distillative processing of 1,6-hexanediol, 1,5-pentanediol and caprolactone |
Feb. 12, 2008 |
| 7311807 |
Process for the separation of mixtures containing m-and p-dichlorobenzene |
Dec. 25, 2007 |
| 7309403 |
Method for avoiding corrosion |
Dec. 18, 2007 |
| 7294240 |
Method for producing (meth)acrylic acid esters |
Nov. 13, 2007 |
| 7267746 |
Dividing wall distillation column control apparatus |
Sep. 11, 2007 |
| 7264696 |
Dividing-wall column with feed in whole or in part in the vaporous state and/or side stream take off in whole or in part in the vaporous state |
Sep. 4, 2007 |
| 7238260 |
Purification of N-(2-hydroxyethyl)-2-pyrrolidone |
Jul. 3, 2007 |
| 7189311 |
Purification of difluoromethane |
Mar. 13, 2007 |
| 7169267 |
Method and device for carrying out the distillative separation of C.sub.5+ cuts |
Jan. 30, 2007 |
| 7132038 |
Method and device for obtaining 1,3 pure butadiene from 1,3 raw butadiene by distillation |
Nov. 7, 2006 |
| 7128813 |
Process for manufacturing high purity methacrylic acid |
Oct. 31, 2006 |
| 7105078 |
Method for producing an aqueous hydroxylamine solution devoid of salt |
Sep. 12, 2006 |
| 7090748 |
Dividing-wall column with feed in whole or in part in the vaporous state and/or side stream take off in whole or in part in the vaporous state |
Aug. 15, 2006 |
| 7001490 |
Purification of ammonia by distillation |
Feb. 21, 2006 |
| 6986833 |
Process for fractionating water-containing crude amine mixtures from amine synthesis |
Jan. 17, 2006 |
| 6972075 |
Method for removing 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine |
Dec. 6, 2005 |
| 6942762 |
Method for the production of a salt-free aqueous hydroxylamine solution |
Sep. 13, 2005 |
| 6913674 |
Process for fractionating water-containing crude amine mixtures from amine synthesis |
Jul. 5, 2005 |
| 6863778 |
Separation of tertiary butyl alcohol from diisobutylene |
Mar. 8, 2005 |
| 6860971 |
Process for recovery of olefinically unsaturated nitriles |
Mar. 1, 2005 |
| 6846389 |
Method for distillative separation of mixtures containing tetrahydrofuran, .gamma.-butyrolactone and/or 1,4-butanediol |
Jan. 25, 2005 |
| 6833057 |
Pure ethylene oxide distillation process |
Dec. 21, 2004 |
| 6821396 |
Process for fractionating water-containing crude amine mixtures from amine synthesis |
Nov. 23, 2004 |
| 6793776 |
Operation of heads column |
Sep. 21, 2004 |
| 6793777 |
Method for separating and purifying an aqueous mixture that mainly consists of acetic acid and formic acid |
Sep. 21, 2004 |
| 6780289 |
Process for the purification and recovery of acetonitrile |
Aug. 24, 2004 |
| 6733637 |
Process for producing ultra-high purity isopropanol |
May. 11, 2004 |
| 6726811 |
Method of purifying N-(2-hydroxyethy)-2-pyrrolidone |
Apr. 27, 2004 |
| 6695952 |
Method for the separation of and purification of an aqueous mixture consisting of the main components acetic acid and formic acid |
Feb. 24, 2004 |
| 6685802 |
Process and apparatus for removing dissolved and undissolved solids from liquids |
Feb. 3, 2004 |
| 6627046 |
Separation of the products of polyamide ammonolysis |
Sep. 30, 2003 |
| 6605192 |
Method for producing highly pure monoethylene glycol |
Aug. 12, 2003 |
| 6599398 |
Recovery of adiponitrile from a mixture of adiponitrile, aminocapronitrile and hexamethylenediamine |
Jul. 29, 2003 |
| 6551465 |
Dividing wall column control system |
Apr. 22, 2003 |
| 6547933 |
Process for the purification of aromatic polyamines |
Apr. 15, 2003 |
| 6511583 |
Method for separating a liquid crude aldehyde mixture by distillation |
Jan. 28, 2003 |
| 6488818 |
Removal of impurities from 3-(2'-acetoxyethyl)-dihydro-2(3H)furanone |
Dec. 3, 2002 |
| 6478929 |
Dewatering process |
Nov. 12, 2002 |
| 6472568 |
Reaction and distillation device and etherification process |
Oct. 29, 2002 |
| 6395140 |
Method for producing (meth)acrylic acid |
May. 28, 2002 |
| 6387222 |
Continuous isolation of a high-melting material by distillation |
May. 14, 2002 |
| 6387223 |
Alkylene carbonate process |
May. 14, 2002 |
| 6315868 |
Method of separating dimethyl carbonate and methanol |
Nov. 13, 2001 |
| 6264799 |
Process for isolating cyclopentane and/or cyclopentene |
Jul. 24, 2001 |
| 6254735 |
Process for separating medium boiling substances from a mixture of low, medium and high boiling substances |
Jul. 3, 2001 |
| 6228226 |
Process for working up crude, liquid vinyl acetate |
May. 8, 2001 |
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