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Class Information
Number: 568/621
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Ethers > Plural oxyalkylene groups bonded directly to each other > 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

Patent Number Title Of Patent Date Issued
8501998 Method for producing polyoxyalkylene derivative and polyoxyalkylene derivative Aug. 6, 2013
8431672 Method for manufacturing an isocyanate-terminated prepolymer, prepolymer obtained thereby, and polyurethane resin Apr. 30, 2013
8362304 Process for making glycol ether compositions useful for metal recovery Jan. 29, 2013
8114957 Process for preparing poly(trimethylene ether) glycol and copolymers thereof Feb. 14, 2012
8092682 Matrix for separation of polyethers and method of separation Jan. 10, 2012
8053607 Method for producing polyether-polyol having narrow molecular weight distribution Nov. 8, 2011
8034980 Method for producing polyether polyols Oct. 11, 2011
8017814 Process for the preparation of polyether polyols Sep. 13, 2011
7919575 Starter feed stream acidification in DMC-catalyzed process Apr. 5, 2011
7745668 Processes for reducing color in polytrimethylene ether glycol polymers Jun. 29, 2010
7678944 Process for production of polyethers and polymers Mar. 16, 2010
7553921 Polyether polyol composition and use thereof Jun. 30, 2009
7528288 Method for production of polyether alcohols May. 5, 2009
7414159 Separation of liquid mixtures in a film evaporator Aug. 19, 2008
7342142 Hydrogenation of polytrimethylene ether glycol Mar. 11, 2008
7294746 Processes for removal of color bodies from polytrimethylene ether glycol polymers Nov. 13, 2007
7288682 Separation of bifunctional perfluoropolyethers (PFPEs) having -CH.sub.2OH termination from their mixtures with -CH.sub.2OH monofunctional PFPEs Oct. 30, 2007
7214833 Process for preparing perfluoropolyethers May. 8, 2007
7186867 Process for preparing reactive polyether polyols having an ethylene oxide end block Mar. 6, 2007
7074969 Process for preparation of polytrimethylene ether glycols Jul. 11, 2006
7009082 Removal of color bodies from polytrimethylene ether glycol polymers Mar. 7, 2006
7005552 Single reactor synthesis of KOH-capped polyols based on DMC-synthesized intermediates Feb. 28, 2006
6987201 Acetic anhydride, method of purifying crude acetic anhydride, and method of producing polyoxytetramethylene glycol using acetic anhydride Jan. 17, 2006
6977045 Process for the fractionation of polymers Dec. 20, 2005
6939993 Method for separation of reaction products from catalysts Sep. 6, 2005
6930210 Process to produce polyether polyols Aug. 16, 2005
6858761 Process for preserving resin catalyst for addition reaction of alkylene oxide and utilization of this process Feb. 22, 2005
6835686 Catalyst system and process for rearrangement of epoxides to allylic alcohols Dec. 28, 2004
6818587 Double-metal cyanide catalysts for preparing polyether polyols Nov. 16, 2004
6812367 Polyethylene glycol and process for producing the same Nov. 2, 2004
6780813 Process for producing DMC catalysts Aug. 24, 2004
6776925 Process for the preparation of polyether polyols Aug. 17, 2004
6761824 Process for the fractionation of polymers Jul. 13, 2004
6734151 Process for producing a high-purity oxygenic compound and lubricating oil May. 11, 2004
6670406 Process for producing polyether polyols Dec. 30, 2003
6620976 Polyethylene glycol and process for producing the same Sep. 16, 2003
6515036 Method of decomposing a polyurethane Feb. 4, 2003
6504062 Process for the preparation of odor-lean polyether polyols Jan. 7, 2003
6486354 Solid phase supports Nov. 26, 2002
6455639 Oxirane derivative and process for the preparation thereof Sep. 24, 2002
6448371 Process for the purification of aldehyde impurities Sep. 10, 2002
6444858 Method of reducing flock during alkoxylation Sep. 3, 2002
6437195 Preparation of polyoxymethylene dimethyl ethers by acid-activated catalytic conversion of methanol with formaldehyde formed by dehydrogenation of methanol Aug. 20, 2002
6410676 Method for producing polyoxyalkylene polyol and derivatives thereof Jun. 25, 2002
6403842 Processes for producing poly(alkylene ether) glycol Jun. 11, 2002
6392102 Preparation of polyoxymethylene dimethyl ethers by catalytic conversion of formaldehyde formed by oxidation of dimethyl ether May. 21, 2002
6384216 Purification of alkenyl compounds May. 7, 2002
6372923 Process for preparing alcohol derivatives Apr. 16, 2002
6362126 Supported double metal cyanide catalysts, method for producing them, and their use for producing polyether alcohols Mar. 26, 2002
6350919 Preparation of polyoxymethylene dialkane ethers, by catalytic conversion of formaldehyde formed by dehydrogenation of methanol or dimethyl ether Feb. 26, 2002

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