Patent · US Expired

Process for the preparation of weakly acid cation exchange resins

US5175193A · kind A · utility

8Cited by

2References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Harold Heller · Narberth, US
Friedrich Werner · Cologne, DE
Alfred Mitschker · Odenthal, DE
Herbert Diehl · Leverkusen, DE
Axel Schafer · Bad Soden, DE

Key dates

Filing date	Jan 7, 1991
Grant date	Dec 29, 1992
Priority date	—
Expiry date	Jan 7, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2810/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to an environment-friendly process for the preparation of weakly acid cation exchange resins by hydrolysis of crosslinked acrylonitrile bead polymers with an alkaline hydrolizing agent at elevated temperature, according to which the bead polymer and alkaline hydrolizing agent are brought together at elevated temperature only.

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