Continuous granulation process

US5188786A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Elmar Wilms · Dormagen, DE
• Frank Wiemer · Erkrath, DE

Key dates

• Filing date: Jun 27, 1991
• Grant date: Feb 23, 1993
• Expiry date: Jun 27, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention concerns a process for the continuation granulation of a mixture containing at least one solid material and at least one liquid exhibiting a tendency to gel formation. In order to make it possible to work with a gel-like intermediate phase and yet continue to granulate, it is proposed that a mixture containing liquid raw materials which, by themselves, do not show any tendency to gel be used as the liquid exhibiting a tendency to gel, this mixture being produced in a static mixer, its average dwell time in the mixer being shorter than the gel time. The liquid is subsequently allowed to gel in a stirrer vessel, the dwell time in the stirrer vessel being longer than the gel time. Only then is the highly viscous mass thus obtained granulated together with the solid material.