Granulation method

US6468957B1 · kind B1 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Bernd Larson · Erkelenz, DE
• Josef Markiefka · Goldkronach, DE
• Wilfried Raehse · Goldkronach, DE
• Wieland Schulze · Langenfeld, DE
• Matthias Sunder · Goldkronach, DE

Key dates

• Filing date: Mar 28, 2001
• Grant date: Oct 22, 2002
• Expiry date: Mar 28, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D17/065
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a neutralization and granulation method wherein a neutralizing foam is used as granulation adjuvant. The neutralizing foam was previously obtained by mixing an anionic surfactant in its acid form, which was expanded using a gaseous medium, and a highly concentrated, aqueous alkaline component, which was expanded using a gaseous medium. The neutralizing foam has an average pore size of less than 10 mm, preferably less than 5 mm and especially less than 2 mm.