Patent · US Active

Method of scale inhibition

US8461088B2 · kind B2 · utility

1Cited by

9References

9Claims

0Family size

Assignee

Dequest AG · CH

Inventors

Patrick Notte · Wavre, BE
Albert Devaux · Mont-Saint-Guibert, BE
Jan Van Bree · Ottenburg, BE
Tessa Johnson · Gijzegem, BE

Key dates

Filing date	May 25, 2007
Grant date	Jun 11, 2013
Priority date	—
Expiry date	Feb 28, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F2209/06
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method is disclosed to inhibit scale formation in aqueous systems whereby a threshold amount of a scale inhibiting agent, represented by an aminoacid alkylphosphonic acid, is added to the aqueous system. The aminoacid moiety can be represented by α-species or by species having, at least, two or more carbon atoms between the carboxylic moiety and the amine group. These aminoacid based inhibitors exhibit unusually superior performance and system acceptability compared to leading state-of-the-art inhibitors.

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