Preparation of amino polyols

Details Preparation of amino polyols Preparation of amino polyols

C - Chemistry, Metallurgy

08

G

400/107, 260/233

C08G 59/64 (2006.01) C08G 18/50 (2006.01) C08G 18/66 (2006.01) C08G 65/26 (2006.01) C08G 65/30 (2006.01)

Patent

CA 1210761

PREPARATION OF AMINO POLYOLS ABSTRACT An improved method is disclosed for producing amino polyols useful in preparing polyurethane foams. The improvement concerns charging ammonia, a primary amine or a secondary amine to the reaction vessel at the end of the oxide digestion step. The amine or ammonia scavenges the residual oxide and the resulting alkanol amine becomes one of the components of the polyol mixture. Alkanol amines are beneficial components of urethane polyols. In prior art industrial practice, residual oxide is vented to a scrubber system and then stripped to a low concentration.

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