Preparation of a pure dialkylaminoethanol stable against discolo

Details Preparation of a pure dialkylaminoethanol stable against discolo Preparation of a pure dialkylaminoethanol stable against discolo

1995-06-30

1997-09-02

Burn, Brian M.

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

Organic compounds

Amino nitrogen containing

C07C20902

Patent

active

056634447

ABSTRACT:
A process for the preparation of a color-stable dialkylaminoethanol of the formula ##STR1## in which R.sup.1 and R.sup.2 independently are C.sub.1 -C.sub.20 -alkyl, by reacting ethylene oxide with a dialkylamine of the formula HNR.sup.1 R.sup.2, in which R.sup.1 and R.sup.2 have the same meaning, in the presence of from 2.5 to 50% by weight of water, based on the reaction mixture, at a temperature of from 95.degree. to 170.degree. C., and separating off the water and high-boiling constituents by distillation under a reduced pressure and at a temperature of from 40.degree. to 90.degree. C. at the column bottom.

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patent: 4223138 (1980-09-01), Schubart
patent: 4379024 (1983-04-01), Gardner
Houben/weyl, Methoden der organischen Chemie, vol. 11/1, pp. 311-350 (1957).
Helvetica Chimica Acta, vol. 52, pp. 408-418 (1969).

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