Process for the treatment of wastewater from aldolization processes

US7943047B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Siegmar Maassen · Ludwigshafen, DE
• Roland Krokoszinski · Bad Dürkheim, DE
• Detlef Kratz · Heidelberg, DE

Key dates

• Filing date: Sep 25, 2006
• Grant date: May 17, 2011
• Expiry date: Feb 8, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/908
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for the treatment of wastewater from an aldolization process which is contaminated with water-soluble and/or dispersed organic impurities by means of single-stage or multistage extraction with an organic liquid of the aldolization process wastewater which has been set to a pH of from 0 to 6, in which an organic liquid obtained by stripping of the acidified aldolization process wastewater or of the acidified and extracted aldolization process wastewater, condensation of the stripped compounds and phase separation of the condensate is used as extractant for the extraction of organic impurities from the acidified aldolization process wastewater and wastewater having a lower content of organic impurities than the aldolization process wastewater fed to the extraction is taken off from the stripping apparatus.