Method for fractioning poly (ethylene oxide) formed using a metallic cyanide catalyst
This invention relates to methods for purifying poly(ethylene oxide) polymers. A poly(ethylene oxide) polymer having low and high molecular weight fractions is fractionated by dissolving the polymer in a solvent for the low molecular weight fraction. A good separation of the low and high molecular w...
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| creator | Clement, Katherine S Walker, Louis L |
| description | This invention relates to methods for purifying poly(ethylene oxide) polymers.
A poly(ethylene oxide) polymer having low and high molecular weight fractions is fractionated by dissolving the polymer in a solvent for the low molecular weight fraction. A good separation of the low and high molecular weight fractions can be obtained. When the poly(ethylene oxide) polymer contains a metal cyanide catalyst, this process also provides a good separation of the catalyst from the low molecular weight fraction. In this instance, the catalyst remains active and the high molecular weight fraction containing the catalyst can be recycled into subsequent polymerization processes. |
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A poly(ethylene oxide) polymer having low and high molecular weight fractions is fractionated by dissolving the polymer in a solvent for the low molecular weight fraction. A good separation of the low and high molecular weight fractions can be obtained. When the poly(ethylene oxide) polymer contains a metal cyanide catalyst, this process also provides a good separation of the catalyst from the low molecular weight fraction. In this instance, the catalyst remains active and the high molecular weight fraction containing the catalyst can be recycled into subsequent polymerization processes.</description><language>eng</language><creationdate>2003</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6552163$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,780,802,885,64038</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6552163$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Clement, Katherine S</creatorcontrib><creatorcontrib>Walker, Louis L</creatorcontrib><creatorcontrib>The Dow Chemical Company</creatorcontrib><title>Method for fractioning poly (ethylene oxide) formed using a metallic cyanide catalyst</title><description>This invention relates to methods for purifying poly(ethylene oxide) polymers.
A poly(ethylene oxide) polymer having low and high molecular weight fractions is fractionated by dissolving the polymer in a solvent for the low molecular weight fraction. A good separation of the low and high molecular weight fractions can be obtained. When the poly(ethylene oxide) polymer contains a metal cyanide catalyst, this process also provides a good separation of the catalyst from the low molecular weight fraction. In this instance, the catalyst remains active and the high molecular weight fraction containing the catalyst can be recycled into subsequent polymerization processes.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2003</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNrjZAj1TS3JyE9RSMsvUkgrSkwuyczPy8xLVyjIz6lU0ADKVeak5qUq5FdkpqRqglTlpqYolBaDlCQq5KaWJObkZCYrJFcm5gEVKCQnAgUqi0t4GFjTEnOKU3mhNDeDgptriLOHbmlxQWJJal5JcXx6USKIMjAzNTUyNDM2JkIJAHUUOds</recordid><startdate>20030422</startdate><enddate>20030422</enddate><creator>Clement, Katherine S</creator><creator>Walker, Louis L</creator><scope>EFH</scope></search><sort><creationdate>20030422</creationdate><title>Method for fractioning poly (ethylene oxide) formed using a metallic cyanide catalyst</title><author>Clement, Katherine S ; Walker, Louis L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_065521633</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2003</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Clement, Katherine S</creatorcontrib><creatorcontrib>Walker, Louis L</creatorcontrib><creatorcontrib>The Dow Chemical Company</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Clement, Katherine S</au><au>Walker, Louis L</au><aucorp>The Dow Chemical Company</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method for fractioning poly (ethylene oxide) formed using a metallic cyanide catalyst</title><date>2003-04-22</date><risdate>2003</risdate><abstract>This invention relates to methods for purifying poly(ethylene oxide) polymers.
A poly(ethylene oxide) polymer having low and high molecular weight fractions is fractionated by dissolving the polymer in a solvent for the low molecular weight fraction. A good separation of the low and high molecular weight fractions can be obtained. When the poly(ethylene oxide) polymer contains a metal cyanide catalyst, this process also provides a good separation of the catalyst from the low molecular weight fraction. In this instance, the catalyst remains active and the high molecular weight fraction containing the catalyst can be recycled into subsequent polymerization processes.</abstract><oa>free_for_read</oa></addata></record> |
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| title | Method for fractioning poly (ethylene oxide) formed using a metallic cyanide catalyst |
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