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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6350920 |
Method for preparing polyether polyols |
Feb. 26, 2002 |
| 6350919 |
Preparation of polyoxymethylene dialkane ethers, by catalytic conversion of formaldehyde formed by dehydrogenation of methanol or dimethyl ether |
Feb. 26, 2002 |
| 6306263 |
Impurities separation by distillation |
Oct. 23, 2001 |
| 6211415 |
Process for thermal decomposition of hexafluoropropylene oxide oligomers |
Apr. 3, 2001 |
| 6191315 |
Haze free polyether polyol compositions and a method for their preparation |
Feb. 20, 2001 |
| 6166266 |
Preparation of polyoxymethylene dimethyl ethers by catalytic conversion of dimethyl ether with formaldehyde formed by oxidation of methanol |
Dec. 26, 2000 |
| 6160186 |
Preparation of polyoxymethylene dimethyl ethers by catalytic conversion of dimethyl ether with formaldehyde formed by dehydrogenation of dimethyl ether |
Dec. 12, 2000 |
| 6160174 |
Preparation of polyoxymethylene dimethyl ethers by catalytic conversion of dimethyl ether with formaldehyde formed by oxy-dehydrogenation of methanol |
Dec. 12, 2000 |
| 6093855 |
Separation of the divinyl ether of diethylene glycol or triethylene glycol from the monovinyl ether of the corresponding oliogethylene glycol |
Jul. 25, 2000 |
| 6087539 |
Process for producing an ether compound |
Jul. 11, 2000 |
| 6034281 |
Purification of diethylene glycol monoethyl ether |
Mar. 7, 2000 |
| 5962748 |
Process for preparing low unsaturation polyether polyols |
Oct. 5, 1999 |
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