Method for producing encapsulated sodium percarbonate particles

US8945671B2 · kind B2 · utility

Assignee

• Evonik Treibacher GmbH · AT

Inventors

• Stefan Leininger · Langenselbold, DE
• Michael Scheibe · Hanau, DE
• Harald Jakob · Hasselroth, DE

Key dates

• Filing date: Nov 20, 2008
• Grant date: Feb 3, 2015
• Expiry date: Apr 16, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D17/0039
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing coated sodium percarbonate particles by spray application of a sodium sulfate-containing aqueous solution onto sodium percarbonate particles in a fluidized bed and simultaneous evaporation of water, wherein sodium sulfate and sodium percarbonate-containing dust is used to prepare the sodium sulfate-containing aqueous solution.