Patent · US Expired

Process for removing heavy metal sulphides from aqueous systems

US4217209A · kind A · utility

6Cited by

9References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Guido Steffan · Odenthal, DE
Ernst Borgmann · Alsdorf, DE
Peter A. Buchel, deceased · Cologne, DE
Wolfgang Harms · Leverkusen, DE

Key dates

Filing date	Sep 27, 1978
Grant date	Aug 12, 1980
Priority date	—
Expiry date	Sep 27, 1998

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/914
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The invention relates to a method for removing heavy metal sulphides from dilute aqueous systems as they are present in numerous chemical processes. The method is characterized in that water-soluble polymers such as polyethyleneimines, homopolymers or copolymers of derivatives of acrylic acid or methacrylic acid or homopolymers or copolymers of styrenesulphonic acids are added to said systems and the systems are then filtered.

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