Preparation of amino polyols

Details Preparation of amino polyols Preparation of amino polyols

1983-06-27

1985-02-12

Welsh, Maurice J.

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

Organic compounds

Carbohydrates or derivatives

527300, 527312, 536 55, 536 552, 536111, 536120, 544401, 564367, 564388, 564389, 564475, 564505, C08G 5964

Patent

active

044992645

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.

REFERENCES:
patent: 3297597 (1967-01-01), Edwards et al.

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