Process for the removal of catalysts for polyether polyols

Details Process for the removal of catalysts for polyether polyols Process for the removal of catalysts for polyether polyols

1990-03-02

1992-04-14

Mars, Howard T.

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

Organic compounds

Oxygen containing

C07C 4134

Patent

active

051050196

ABSTRACT:
The present invention relates to a process for removing a basic catalyst from a polyether polyol having a hydroxyl number of from 4 to 250 comprising adding from 0.7 to 7 percent by weight of water, based on the polyether polyol, to an alkaline reaction medium containing the polyether polyol at a temperature of from 20.degree. to 120.degree. C.; introducing 1 to 2 times the stoichiometric amount of gaseous carbon dioxide at a temperature of from 75.degree. to 120.degree. C., thereby forming a carbonate salt; and removing the carbonate salt by filtration.

REFERENCES:
patent: 3715402 (1973-02-01), Louvar et al.
patent: 3833669 (1974-09-01), Gehm et al.
patent: 4029879 (1977-06-01), Muzzio
patent: 4129718 (1978-12-01), Muzzio
patent: 4137396 (1979-01-01), Louvar et al.
patent: 4137398 (1979-01-01), Muzzio

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