Improved Method for Synthesis of Difunctional Fluoroalcohols.
Abstract
A series of fluorinated diacids were prepared by the direct fluorination of hydrocarbon acid derivitives with fluorine gas. These diacids were then reduced to fluorinated alcohols with sodium borohydride. A miniplant capable of producing fluorinated diols at a rate of five pounds per day was constructed to demonstrate the technology. The resulting diols wer obtained in much better yields than by conventional synthetic fluorocarbon chemistry. In addition, diols of perfluoropolyether acids were made that are not available using other synthetic methods. The compounds prepared for this contract were 2, 2,3,3,4,4-hexafluoropentane-1,5-diol, 2,2,3,3,4,4,5,5-octofluorohexane-1,6-diol, 2,2,4,4,5,5,7,7-octofluoro-3,6-dioxaoctane-1,8-diol, and 2,2,3,3,4,4,6,6,7,7,8, 8,9,9,11,11,12,12,13,13,14,14,16,16,17,17,18,18-octacosafluoro-5,10,15- trioxanonadecane-1,19-diol.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 03, 1991
- Accession Number
- ADA245070
Entities
People
- Hajimu Kawa
- Richard J. Lagow
- Thomas R. Bierschenk
- Timothy J. Juhlke