Direct polyoxyalkylation of glycerine with double metal cyanide

Details Direct polyoxyalkylation of glycerine with double metal cyanide Direct polyoxyalkylation of glycerine with double metal cyanide

1997-09-17

2000-06-20

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 4311

Patent

active

060779780

ABSTRACT:
Acidification, neutralization, or removal of basic impurities from acid sensitive low molecular weight starter or acidification of a reactor heel prior to addition of acid sensitive low molecular weight starter allows direct oxyalkylation of continuously added acid sensitive low molecular weight starter to produce polyoxyalkylene acid sensitive low molecular weight starter-initiated or co-initiated polyols in the presence of a double metal cyanide catalyst. The preferred acid sensitive low molecular weight starter is glycerine.

REFERENCES:
patent: 2578816 (1951-12-01), Lofdahl
patent: 5391722 (1995-02-01), Chandalia
patent: 5689012 (1997-11-01), Pazos
patent: 5777177 (1998-07-01), Pazos
"Kirk-Othmer Encyclopedia of Chemical Technology," 4th Ed., vol. 12, pp.681-594, 1994.

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