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Class Information
Number: 203/DIG.16
Name: Distillation: processes, separatory > Combination
Description:










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8618334 Cyclohexanone production process with modified post-distillation Dec. 31, 2013
8586788 Method for producing of ultra-clean and high-purity electronic grade acetic acid Nov. 19, 2013
8506766 Method for recovery of acetic acid from an aqueous solution thereof Aug. 13, 2013
8444830 Desalination May. 21, 2013
8337672 Method and device for producing vacuum in a petroleum distillation column Dec. 25, 2012
8197645 Process for separating propylene glycol from aqueous compositions Jun. 12, 2012
8075740 Method and system for treating feedwater Dec. 13, 2011
7744727 Distillation method Jun. 29, 2010
7438129 Water treatment method for heavy oil production using calcium sulfate seed slurry evaporation Oct. 21, 2008
7428926 Water treatment method for heavy oil production Sep. 30, 2008
7297181 Purification and transfilling of ammonia Nov. 20, 2007
7150320 Water treatment method for heavy oil production Dec. 19, 2006
7077201 Water treatment method for heavy oil production Jul. 18, 2006
6733636 Water treatment method for heavy oil production May. 11, 2004
6491795 Process for recovering benzyl benzoate Dec. 10, 2002
6485613 Batch-continuous countercurrent mass transfer process Nov. 26, 2002
6398917 Apparatus for the purification of commercially available diphenyl-p-phenylenediamine (DPPD) Jun. 4, 2002
RE36527 Apparatus for removing solid and volatile contaminants Jan. 25, 2000
5874575 Preparation of caprolactam Feb. 23, 1999
5868906 Dehydration and purification of isopropyl alcohol to an ultradry and ultrapure level Feb. 9, 1999
5744010 Process for the preparation of the non-toxic salts of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide and arrangement for carrying out this process Apr. 28, 1998
5681433 Membrane dehydration of vaporous feeds by countercurrent condensable sweep Oct. 28, 1997
5676801 Radial inflow compressor for large volumetric flows Oct. 14, 1997
5637777 Process and apparatus for preparing tertiary alkyl ether Jun. 10, 1997
5612007 Apparatus for preparing aromatic carboxylic acids with efficient energy recovery Mar. 18, 1997
5609733 System and method for converting toxic washwater to distilled water Mar. 11, 1997
5607557 Ethyl tertio-butyl ether purification process combining a membrane method and distillation Mar. 4, 1997
5591311 Process for purifying a 2,6-dialkylphenol Jan. 7, 1997
5582692 Method for the purification of vitamin E Dec. 10, 1996
5582691 Ocean thermal energy conversion (OTEC) system Dec. 10, 1996
5552023 Recovery of spent deicing fluid Sep. 3, 1996
5552024 Process for recovering dipropylene glycol tert-butyl ethers Sep. 3, 1996
5549794 Continuous linear-toroidal extraction-distillation apparatus Aug. 27, 1996
5538599 Phenol separation Jul. 23, 1996
5538599 Phenol separation Jul. 23, 1996
5536376 Method for production of 2-chloropyridine and 2,6-dichloropyridine Jul. 16, 1996
5496778 Point-of-use ammonia purification for electronic component manufacture Mar. 5, 1996
5487817 Process for tocopherols and sterols from natural sources Jan. 30, 1996
5478443 Apparatus for separating biochemical compounds from biological substances Dec. 26, 1995
5468350 Apparatus for manufacturing ultrapure water Nov. 21, 1995
5466344 Method and apparatus for controlling water-based liquid waste Nov. 14, 1995
5464531 Portable water purification system Nov. 7, 1995
5454913 Internals for distillation columns including those for use in catalytic reactions Oct. 3, 1995
5454878 Method for removing hydrocarbon contaminants from solid materials Oct. 3, 1995
5453165 System and method for reducing hydrocarbons in wastewater Sep. 26, 1995
5447609 Catalytic reaction and mass transfer process Sep. 5, 1995
5447607 Ether recovery Sep. 5, 1995
5445731 Pervaporation vessel Aug. 29, 1995
5413681 Process for the recovery of terephthalic acid and ethylene glycol from poly(ethylene terephthalate) May. 9, 1995
5397440 Isolation of dimethyl 4,4'-biphenyldicarboxylate Mar. 14, 1995

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