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Class Information
Number: 568/699
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Ethers > Acyclic > Purification or recovery
Description: Processes which include separating the compound from impurities or from the reaction mixture.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8404904 Process for reducing color of a polyglycerol Mar. 26, 2013
8398728 Process for making a composition comprising at least two different dialkyl ethers Mar. 19, 2013
8378150 Process for the production of dimethyl ether Feb. 19, 2013
8367876 Method for producing polyether Feb. 5, 2013
8354559 Process for purifying polyether Jan. 15, 2013
8350095 Method for the production of dimethyl ether Jan. 8, 2013
8326474 Method for operating a navigation system and navigation system for a motor vehicle Dec. 4, 2012
8269049 Method of producing diethylene-glycol tert-butyl ether using isobutylene and diethylene glycol Sep. 18, 2012
7759528 Acetonitrile removal from the olefinic feed of ether production processes using ionic liquids Jul. 20, 2010
7732648 Multistage catalytic process for olefin etherification Jun. 8, 2010
7553994 Method for producing ditrimethylolpropane Jun. 30, 2009
7439405 Purification of propylene glycol monoalkyl ether Oct. 21, 2008
7414159 Separation of liquid mixtures in a film evaporator Aug. 19, 2008
7335801 Polyglycerols and production thereof Feb. 26, 2008
7332634 Method for the continuous purification by distillation of 1,2-propylene glycol that accumulates during the synthesis of propylene oxide without coupling products Feb. 19, 2008
7304188 Preparation of highly pure methyl tert-butyl ether Dec. 4, 2007
7141705 Etherification process Nov. 28, 2006
7074971 Recovery of ethylene and propylene from a methanol to olefin reaction system Jul. 11, 2006
7060865 Recovery of C4 olefins from a product stream comprising C4 olefins, dimethyl ether and C5+ hydrocarbons Jun. 13, 2006
7022885 Purification on methyl tertiary butyl ether Apr. 4, 2006
6984765 Separation of methanol, ethanol and/or dimethyl ether from hydrocarbon mixtures Jan. 10, 2006
6977290 Process for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and prepolymers thereof Dec. 20, 2005
6927310 Tripropylene glycol production Aug. 9, 2005
6924399 Method of manufacturing dimethyl ether Aug. 2, 2005
6822125 Method for preparing dimethylether using a membrane reactor for separation and reaction Nov. 23, 2004
6613197 Method for isolation of barely volatile organic compounds Sep. 2, 2003
6472568 Reaction and distillation device and etherification process Oct. 29, 2002
6458856 Separation process for one-step production of dimethyl ether from synthesis gas Oct. 1, 2002
6417408 Production process for (poly)alkylene glycol monoalkyl ether Jul. 9, 2002
6387222 Continuous isolation of a high-melting material by distillation May. 14, 2002
6278029 Process for eliminating polar compounds on an etherification unit Aug. 21, 2001
6264800 Purification process Jul. 24, 2001
6232508 Process for manufacturing ether and high purity butene-1 May. 15, 2001
6232509 Etherification process May. 15, 2001
6218582 Method for the reduced formation of tertiary butyl alcohol in a finishing reactor in the manufacture of methyl tertiary butyl ether Apr. 17, 2001
6214172 Preparation of methylglyoxal dimethyl acetal Apr. 10, 2001
6197163 Process for removing impurities from petroleum products Mar. 6, 2001
6159344 Reaction and distillation device Dec. 12, 2000
6107526 Process for producing ethyl tertiary butyl ether Aug. 22, 2000
6087539 Process for producing an ether compound Jul. 11, 2000
6069284 Process for separating diisopropyl ether from isopropyl alcohol and water May. 30, 2000
6037502 Etherification process Mar. 14, 2000
5998675 Process for preparing tertiary alkyl ethers Dec. 7, 1999
5990361 Process for producing ethyl tertiary butyl ether by catalytic distillation Nov. 23, 1999
5985100 Process for separating butanol and dibutyl ether by means of dual-pressure distillation Nov. 16, 1999
5973096 Process for purifying a polyether Oct. 26, 1999
5908964 Process for preparing alkyl ethers and mixtures thereof Jun. 1, 1999
5882485 Process for the separation of dimethyl ether and chloromethane in mixtures Mar. 16, 1999
5847224 Method for improving the color of MTBE, ETBE and TAME Dec. 8, 1998
5847230 Nitrile removal in an etherification process Dec. 8, 1998

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