Patent · US Active

Process for the preparation of a powder comprising one or more complexing agent salts

US9540597B2 · kind B2 · utility

1Cited by

24References

15Claims

0Family size

Assignee

BASF SE

Inventors

Frank Mrzena · Mutterstadt, DE
Ullrich Menge · Weil am Rhein, DE
Michael Schoenherr · Wausau, US
Thomas Heidenfelder · Münstermaifeld, DE

Key dates

Filing date	Oct 11, 2010
Grant date	Jan 10, 2017
Priority date	—
Expiry date	Oct 11, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D17/06
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of a powder comprising one or more complexing agent salts of the general formulacomprises atomizing an aqueous solution comprising the one or more complexing agent salts in the presence of a crystalline fine dust of the same complexing agent salts and a drying step, wherein the concentration of the one or more complexing agent salt is from 10 to 80% by weight, based on the total weight of the aqueous solution, with an upper limit for the average particle diameter of the crystalline fine dust which is lower by at least a factor of 2 than the lower limit of the average particle diameter of the powder obtained after the process, and the fraction of the crystalline fine dust is from 0.1 to 20% by weight, based on the weight of the powder obtained after the process.

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