Patent · US Expired

Preparation of perfluoropolyethers having at least one —CH2OH or —CH(CF3)OH end group

US7132574B2 · kind B2 · utility

4Cited by

6References

10Claims

0Family size

Assignee

SOLVAY SOLEXIS S.P.A. · IT

Inventors

Rosaldo Picozzi · Cesate, IT
Claudio Adolfo Pietro Tonelli · Sesto San Giovanni, IT

Key dates

Filing date	May 7, 2004
Grant date	Nov 7, 2006
Priority date	—
Expiry date	Jan 28, 2025

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J23/464
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for preparing perfluoropolyethers having at least one —CH2OH or —CH(CF3)OH end group by reaction of the corresponding pefluoropolyethers having at least one carboxylic —COOH or ketonic —(CF3)C═O end group with gaseous hydrogen, between 80° C. and 140° C., in the presence of hydrogenation catalysts.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.