Removal of color bodies from polytrimethylene ether glycol...

Details Removal of color bodies from polytrimethylene ether glycol... Removal of color bodies from polytrimethylene ether glycol...

C - Chemistry, Metallurgy

07

C

C07C 41/36 (2006.01)

Patent

CA 2522772

A process is described for reducing the discoloration of PO3G. The discolored polymer is contacted with adsorbent and separated therefrom, for instance, by filtration. The treated polytrimethylene, preferably, has an APHA color of less than about 50 and a molecular weight of about 250 to about 5000.

La présente invention concerne un procédé pour réduire la décoloration du PO3G. En l'occurrence, on prend le polymère décoloré, et on le met en contact avec un adsorbant, et on l'en sépare, notamment par filtration. De préférence, le polytriméthylène ainsi traité présente, au test APHA, une coloration n'excédant pas environ 50 pour une masse moléculaire comprise entre environ 250 et environ 5000.

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