Reduction of encrustation of crystallization processes

US6444181B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Udo Setzer · Hirschberg, DE
• Bernhard Otto · Schifferstadt, DE
• Siegfried Bechtel · Lampertheim, DE
• Richard van Gelder · Heerlen, NL
• Thomas Fetzer · Speyer, DE
• Joachim Borgwart · Ludwigshafen, DE
• Matthias Rauls · Ludwigshafen, DE
• Christoph Gahn · Speyer, DE

Key dates

• Filing date: Sep 26, 2000
• Grant date: Sep 3, 2002
• Expiry date: Sep 26, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/0025
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process and an apparatus for avoiding encrustations in reactors or crystallizers (13), such as industrial crystallizers for suspensions (11), points of incidence (4) for the excitation of ultrasonic oscillations by sonotrodes (3) which are connected to electromechanical converters (2) are provided on the walls (6, 21) and on the base (7) of the crystallizer (13). The ultrasonic frequency is generated at high-frequency generators (1).