Patent · US Active

Method for improved removal of cations by means of chelating resins

US8440730B2 · kind B2 · utility

0Cited by

9References

9Claims

0Family size

Assignee

LANXESS Deutschland GmbH · DE

Inventors

Reinhold Klipper · Neunburg vorm Wald, DE
Stefan Neumann · Berlin, DE
Jens Stoll · Leverkusen, DE
Michael Schelhaas
Pierre Vanhoorne · Monheim, DE

Key dates

Filing date	Sep 27, 2010
Grant date	May 14, 2013
Priority date	—
Expiry date	Sep 3, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F212/36
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having aminomethylphosphonic acid groups and iminodimethylphosphonic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, and a markedly lengthened loading duration of the chelating resin, to the chelating exchangers themselves, and also to uses thereof.

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