Process for the production of methyl-blocked ethoxylates

Details Process for the production of methyl-blocked ethoxylates Process for the production of methyl-blocked ethoxylates

1981-07-02

1983-08-02

Doll, John

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

Organic compounds

Amino nitrogen containing

564505, 568608, 568613, 568621, C07C 9140, C07C 9142, C07C 4311, C07C 4318

Patent

active

043967760

ABSTRACT:
A process for preparing a methyl-blocked ethoxylate comprises heating at 180.degree.-320.degree. C., in the presence of a catalytically effective amount of a noble metal catalyst, an unsubstituted ethoxylate of 3 or more ethoxy units, or a monoalkyl-, monoaryl-, mono- or di-alkylamino- or mono- or di-arylamino ethoxylate of 2 or more ethoxy units, or a monoalkyl- or monoaryl-N,N-bis(ethoxylate) of 2 or more ethoxy units, all of which are derived from vicinal glycols, whereby there is prepared a corresponding methyl-blocked ethoxylate product which, for an unsubstituted ethoxylate starting material is a dimethylethoxylate having two fewer ethoxy units than the starting ethoxylate, and for the other ethoxylate starting materials, is a methylethoxylate having one less ethoxy unit in each ethoxylate group of the starting material.

REFERENCES:
patent: 3428692 (1969-02-01), Starks et al.

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