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Class Information
Number: 203/73
Name: Distillation: processes, separatory > Plural distillations performed on same material > One a distillation under positive pressure or vacuum
Description: Processes in which at least one distillation operation is carried out under a pressure greater than atmospheric or under a vacuum.

Sub-classes under this class:

Class Number Class Name Patents
203/78 And returning distillation product to a previous distillation zone 252
203/74 Distillation of initial distillate 133
203/79 Including the addition of water or steam 86
203/80 Initial distillation under positive pressure or vacuum 299

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8574406 Process to remove product alcohol from a fermentation by vaporization under vacuum Nov. 5, 2013
8551296 Process for preparing high-purity hexachlorodisilane Oct. 8, 2013
8530679 Delta 9--tetrahydrocannabinol processing Sep. 10, 2013
8518219 Process for the treatment of organic waste and product obtained thereof Aug. 27, 2013
8317982 FGEPSC (flared, gas exhaust, pneumatic, saturation and condensation) process and system Nov. 27, 2012
8192589 Purification of aqueous solutions of organic acids Jun. 5, 2012
8163138 Method for processing effluent from chloromethylation of vinyl aromatic polymers Apr. 24, 2012
7976818 Method for recovering titanium tetrachloride from a waste liquid Jul. 12, 2011
7846304 Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole Dec. 7, 2010
7670464 Method for the distillative separation of a mixture containing vinyl ether and alchol Mar. 2, 2010
7666282 Process for providing ethanol Feb. 23, 2010
7592468 Production of .DELTA. 9 tetrahydrocannabinol Sep. 22, 2009
7572353 Ethanol distillation process Aug. 11, 2009
7497931 Distillative preparation of IPDA having a high cis/trans isomer ratio Mar. 3, 2009
7473338 Distillation apparatus for readily polymerizable compound Jan. 6, 2009
7449088 Process for obtaining fatty acids with improved odor, color and heat stability Nov. 11, 2008
7052582 Wave powered evaporation desalination system May. 30, 2006
7005544 Method for preventing polymerization in an acrylic acid manufacturing process Feb. 28, 2006
6982026 Azeotropic distillation process for producing organic acids or organic acid amides Jan. 3, 2006
6946055 Method for recovering an organic solvent from a waste stream containing supercritical CO2 Sep. 20, 2005
6905576 Method and system for producing silane Jun. 14, 2005
6821394 Process of extracting from haw-pit by dry distillation and its device Nov. 23, 2004
6821382 Method and arrangement for cleaning contaminated condensate including a combined stripper/condenser Nov. 23, 2004
6793777 Method for separating and purifying an aqueous mixture that mainly consists of acetic acid and formic acid Sep. 21, 2004
6780288 Process for the manufacture of concentrated solutions Aug. 24, 2004
6635150 Method for distilling a fluid with horizontal vapor transfer into a condensation zone and modular device for implementing said method Oct. 21, 2003
6605191 Method for reprocessing reaction mixtures containing diaryl carbonate Aug. 12, 2003
6514388 Method for producing highly pure monoethylene glycol Feb. 4, 2003
6464839 Beta-elemene, method to prepare the same and uses thereof Oct. 15, 2002
6391162 Desalination apparatus and method of operating the same May. 21, 2002
6334935 Distillation of (meth) acryloxy-bearing alkoxysilane Jan. 1, 2002
6211398 Process for the preparation of dialkyl esters of naphthalenedicarboxylic acids Apr. 3, 2001
6171449 Cascade reboiling of ethylbenzene/styrene columns Jan. 9, 2001
6120654 Process for the purification of maleic anhydride Sep. 19, 2000
6096941 Distillation of vinylaromatic monomer Aug. 1, 2000
6096171 Process for the distillation of crude ester in the DMT/PTA process Aug. 1, 2000
6045661 Process and apparatus for recovering diluent, monomer, and comonomer from a polymerization reactor effluent Apr. 4, 2000
6045808 Method for removing high boiling solvents from drug formulations by vacuum drying Apr. 4, 2000
6030505 Process for the continuous preparation of pure 5-formyl valeric acid esters Feb. 29, 2000
5993607 Process for the purification of chlorinated aromatic hydrocarbons Nov. 30, 1999
5993608 Process for recovering processing liquids Nov. 30, 1999
5948212 Titanium separation process Sep. 7, 1999
5935388 Distillation plant with a heat pump Aug. 10, 1999
5916422 Method of purifying acetic acid Jun. 29, 1999
5874575 Preparation of caprolactam Feb. 23, 1999
5858178 Process and device for preparing and/or extracting samples using a vaporizable agent at high temperature Jan. 12, 1999
5853549 Desalination of seawater by evaporation in a multi-stack array of vertical tube bundles, with waste heat. Dec. 29, 1998
5833813 Method of recovering and dehydrating ethylene sulfide Nov. 10, 1998
5830325 Separating and removing 1, 1, 1-trifluoroethane by using azeotropic distillation Nov. 3, 1998
5811597 Method for the manufacture of methyl tertiary butyl ether from tertiary butyl alcohol and methanol Sep. 22, 1998

1 2 3 4

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