Perfluoroalkyl sulfonates, their preparation and use

US5773637A · kind A · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Walter Vladimir Cicha · Pittsburgh, US
• Andreas Josef Kornath · Kamen, DE
• Ronald J. McKinney · Wilmington, US
• V. N. Mallikarjuna Rao · Wilmington, US
• Joseph Stuart Thrasher · Tuscaloosa, US
• Alfred Waterfeld · Freren, DE

Key dates

• Filing date: Sep 6, 1996
• Grant date: Jun 30, 1998
• Expiry date: Sep 6, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F11/005
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is disclosed for preparing a perfluoroalkyl sulfonate of the formula R.sub.a MX.sub.b-c O.sub.g (SO.sub.3).sub.d (R.sub.f).sub.e !.sub.c. This process involves reacting a reagent of the fonnula R.sub.a MX.sub.b O.sub.g and a second reagent of the formula R'.sub.x E(SO.sub.3).sub.d (R.sub.f).sub.e !.sub.y, where PA1 R is selected from the group consisting of C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 perfluoroalkyl, cyclopentadienyl (i.e., C.sub.5 H.sub.5), phenyl and perfluorophenyl; PA1 M is selected from the group consisting of transistion metals of groups 3 to 12, main group elements of group 13 to 16 and lanthanide metals; PA1 X is selected from the group consisting of F, Cl and Br; PA1 R.sub.f is selected from the group consisting of C.sub.h F.sub.2h+1, C.sub.h F.sub.2h, wherein h is an integer from 0 to 10, perfluorophenyl, C.sub.6 F.sub.4 (CF.sub.2).sub.2 i, wherein i is an integer from 0 to 6, provided that when E is boron, R.sub.f is selected from the group consisting of C.sub.h' F.sub.2h'+1, wherein h' is an integer from 1 to 10, perfluorophenyl; PA1 R' is selected from the group consisting of C.sub.j H.sub.2j+1, wherein j is an integer from 1 to 4, and phenyl…