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Class Information
Number: 203/80
Name: Distillation: processes, separatory > Plural distillations performed on same material > One a distillation under positive pressure or vacuum > Initial distillation under positive pressure or vacuum
Description: Processes in which the initial distillation is carried out under a pressure greater than atmospheric or under a vacuum.
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 |
| 7592468 |
Production of .DELTA. 9 tetrahydrocannabinol |
Sep. 22, 2009 |
| 7575660 |
Process for the distillative separation of aqueous amine solutions |
Aug. 18, 2009 |
| 7553397 |
Process |
Jun. 30, 2009 |
| 7524405 |
Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent |
Apr. 28, 2009 |
| 7481908 |
System and a process for obtaining high purity phenanthrene from phenanthrene enriched coal tar fraction |
Jan. 27, 2009 |
| 7468119 |
Separation of 6-aminocapronitrile and hexamethylenediamine from a mixture comprising hexamethylenediamine, 6-aminocapronitrile and tetrahydroazepine |
Dec. 23, 2008 |
| 7449088 |
Process for obtaining fatty acids with improved odor, color and heat stability |
Nov. 11, 2008 |
| 7431805 |
Method and apparatus for simultaneous heat and mass transfer utilizing a carrier-gas at various absolute pressures |
Oct. 7, 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 |
| 7384501 |
Method for improved turpentine recovery from modern cooking plants |
Jun. 10, 2008 |
| 7361795 |
Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride |
Apr. 22, 2008 |
| 7329330 |
Method and device for the distillative processing of 1,6-hexanediol, 1,5-pentanediol and caprolactone |
Feb. 12, 2008 |
| 7241928 |
Process for the manufacture of halocarbons and selected compounds and azeotropes with HF |
Jul. 10, 2007 |
| 7238260 |
Purification of N-(2-hydroxyethyl)-2-pyrrolidone |
Jul. 3, 2007 |
| 7169267 |
Method and device for carrying out the distillative separation of C.sub.5+ cuts |
Jan. 30, 2007 |
| 7157610 |
Process for recovering methanol |
Jan. 2, 2007 |
| 7147757 |
Method for separating an azepine derivative out of a mixture containing an amine an azepine derivative |
Dec. 12, 2006 |
| 7128814 |
Process for separating 2-butanol from tert-butanol/water mixtures |
Oct. 31, 2006 |
| 7128813 |
Process for manufacturing high purity methacrylic acid |
Oct. 31, 2006 |
| 7125474 |
Process for removing 2-butanol from tert-butanol/water mixtures |
Oct. 24, 2006 |
| 7074434 |
Process for the separation of a mixture comprising at least one hydrofluoroalkane and hydrogen fluoride, processes for the preparation of a hydrofluoroalkane and azeotropic compositions |
Jul. 11, 2006 |
| 7005544 |
Method for preventing polymerization in an acrylic acid manufacturing process |
Feb. 28, 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 |
| 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 |
| 6946055 |
Method for recovering an organic solvent from a waste stream containing supercritical CO2 |
Sep. 20, 2005 |
| 6913674 |
Process for fractionating water-containing crude amine mixtures from amine synthesis |
Jul. 5, 2005 |
| 6896772 |
Method for separating ammonia from solutions containing caprolactam and ammonia |
May. 24, 2005 |
| 6884324 |
Column for concentrating phthalic anhydride |
Apr. 26, 2005 |
| 6863778 |
Separation of tertiary butyl alcohol from diisobutylene |
Mar. 8, 2005 |
| 6863780 |
Process of separating/purifying pentafluoropropane |
Mar. 8, 2005 |
| 6849772 |
Process for producing and purifying 1,1-difluoroethane, and product thus obtained |
Feb. 1, 2005 |
| 6849162 |
Method for the production of propylene oxide |
Feb. 1, 2005 |
| 6849161 |
Process for the production of anhydrous hydrazine and device for its implementation |
Feb. 1, 2005 |
| 6846389 |
Method for distillative separation of mixtures containing tetrahydrofuran, .gamma.-butyrolactone and/or 1,4-butanediol |
Jan. 25, 2005 |
| 6843890 |
Purification and recovery of acetonitrile from waste solvent acetonitrile |
Jan. 18, 2005 |
| 6838104 |
Process for the production of tocotrienols |
Jan. 4, 2005 |
| 6821396 |
Process for fractionating water-containing crude amine mixtures from amine synthesis |
Nov. 23, 2004 |
| 6797125 |
Method of treating condensates |
Sep. 28, 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 |
| 6726811 |
Method of purifying N-(2-hydroxyethy)-2-pyrrolidone |
Apr. 27, 2004 |
| 6706153 |
Process for the separation of a ketoxime or aldoxime from an amide |
Mar. 16, 2004 |
| 6692616 |
Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation |
Feb. 17, 2004 |
| 6685802 |
Process and apparatus for removing dissolved and undissolved solids from liquids |
Feb. 3, 2004 |
| 6673264 |
Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride |
Jan. 6, 2004 |
| 6635151 |
Lactam dehydration method |
Oct. 21, 2003 |
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