Process for the formation of shaped agglomerates from particulate solids

US4920090A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Wolfgang Ritter · Düsseldorf, DE
• Hans-Peter Handwerk · Goldkronach, DE
• Franz-Josef Carduck · Haan, DE

Key dates

• Filing date: Dec 5, 1988
• Grant date: Apr 24, 1990
• Expiry date: Dec 5, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J37/0009
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A new method of forming agglomerates of fine powdered solids comprises dispersing the powder in a chemically inert carrier liquid that also contains a dissolved binder precursor polymer with cyclic dicarboxylic acid anhydride groups on the polymer chain. The dispersion is shaped and then brought into contact with a second carrier liquid that contains polyamines. The polyamines react with the anhydride groups on the other polymer to form an insoluble binder polymer that hardens the shaped dispersion. The hardened shape can then be separated from the liquids and/or further reacted if desired to produce amide bonds in the final agglomerates. The method is useful for forming mechanically and thermally stable agglomerates of such materials as activated carbon, metals dispersed on catalyst carriers, etc.