Process for obtaining pure 2-(perfluoroalkyl)-ethanols from thei

Details Process for obtaining pure 2-(perfluoroalkyl)-ethanols from thei Process for obtaining pure 2-(perfluoroalkyl)-ethanols from thei

1979-07-25

1980-08-26

Mars, Howard T.

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

Organic compounds

Oxygen containing

203 63, 203 64, 203DIG6, 2606535, 560236, C07C 3139

Patent

active

042196809

ABSTRACT:
2-(perfluoroalkyl)-ethanols of the formula R.sub.f CH.sub.2 CH.sub.2 OH are obtained from 2-(perfluoroalkyl)-ethyl iodides of the formula R.sub.f CH.sub.2 CH.sub.2 I as a mixture with 2-(perfluoroalkyl)-ethylenes of the formula R.sub.f CH.dbd.CH.sub.2 and possibly also with 2-(perfluoroalkyl)-ethylcarboxylic acid esters of the formula R.sub.f CH.sub.2 CH.sub.2 OCOR. From these mixtures, the 2-(perfluoroalkyl)-ethanols are obtained with a high purity degree when adding during the distillation separation as entrainer an alkanol having from 1 to 8 carbon atoms or a monoalkyl ether of ethyleneglycol the alkyl radical of which contains 1 to 4 carbon atoms, or a mixture of such alkanols and/or alkylglycols, and in the presence of 2-(perfluoroalkyl)-ethylcarboxylic acid esters, furthermore an acidic ester interchange catalyst.

REFERENCES:
patent: 3283012 (1966-11-01), Day

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