申请人:ASAHI GLASS COMPANY LIMITED
公开号:US20020115893A1
公开(公告)日:2002-08-22
The present invention has an object to provide a method for purifying a fluorinated hydroxyl compound of the formula 1 safely in a high yield under industrially practical conditions. Namely, a mixture containing a fluorinated hydroxyl compound of R
f
—CR
1
R
2
—OH (Formula 1, wherein R
f
is a C
1-20
polyfluoroalkyl group, and each of R
1
and R
2
is a hydrogen atom or a C
1-3
alkyl group) such as 2,2,3,3-tetrafluoropropanol, and a compound having an unshared electron pair, is distilled by heating in the presence of a solid acid catalyst such as a cation exchange resin catalyst, or by adding a proton source such as water.
本发明的目的是在工业实际条件下以高收率安全地提供一种用于纯化式1的氟代羟基化合物的方法。即,在存在固体酸催化剂(如阳离子交换树脂催化剂)或加入质子源(如水)的情况下,通过加热蒸馏含有Rf-CR1R2-OH(式1,其中Rf是C1-20多氟烷基,R1和R2中的每一个是氢原子或C1-3烷基)的氟代羟基化合物混合物(如2,2,3,3-四氟丙醇)来纯化。