Method for performing the purifying separation of crystals out their suspension in a mother liquor

US7540884B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ulrich Hammon · Mannheim, DE
• Dieter Baumann · Greven, DE
• Joerg Heilek · Bammental, DE
• Klaus Joachim Mueller-Engel · Blankenloch, DE
• Bernd Eck · Viernheim, DE

Key dates

• Filing date: Nov 8, 2002
• Grant date: Jun 2, 2009
• Expiry date: Nov 10, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D9/0045
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for purifying removal of crystals from their suspension in mother liquor by means of a washing column having forced transport in which the process chamber is encased by a metal wall which, on its side facing away from the process chamber, is heated at least along the length of the pure melt zone.