Process for the preparation of low-dust granules

US6066365A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Frank Jaekel · Ludwigshafen, DE
• Gerd Reinhardt · Kelkheim, DE
• Gerhard Noltner · Frankfurt am Main, DE

Key dates

• Filing date: May 19, 1993
• Grant date: May 23, 2000
• Expiry date: May 19, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D17/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of low-dust granules, which comprises applying an aqueous solution or suspension of a hydrate-forming compound to a particulate starting material, the particulate starting material being at a temperature below the transition temperature of the hydrate-forming compound during the application of the aqueous solution or suspension and the aqueous solution being at a temperature above the transition temperature, effecting granulation subsequently or simultaneously and, if desired, drying the granules obtained.