Patent · US Expired

Process for preparing gel-type cation exchangers

US6750259B2 · kind B2 · utility

2Cited by

11References

3Claims

0Family size

Assignees

BAYER HEALTHCARE LLC · DE
Sybron Chemicals, Inc. · US

Inventors

George Dimotsis · Woodbury, US
Wolfgang Podszun · Neunburg vorm Wald, DE
Reinhold Klipper · Neunburg vorm Wald, DE

Key dates

Filing date	Jul 8, 2002
Grant date	Jun 15, 2004
Priority date	—
Expiry date	Jul 8, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2800/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a process for preparing gel-type cation exchangers of high stability by sulfonation of crosslinked (meth)acrylic ester-containing bead polymers with sulfuric acid having a concentration of 90 to 95% in the absence of a swelling agent.

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