Process for the extraction of caffeine from super-critical solutions

US4411923A · kind A · utility

Assignee

• HAG Aktiengesellschaft · DE

Inventors

• Peter Hubert · Lemwerder, DE
• Otto Vitzthum · Bremen, DE

Key dates

• Filing date: Feb 9, 1981
• Grant date: Oct 25, 1983
• Expiry date: Feb 9, 2001

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D11/0292
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for extracting caffeine from raw coffee, roast coffee, tea and the like. Super-critical carbon dioxide is used as extracting agent, and ion-exchangers are used to absorb the caffeine, and are subsequently regenerated by use of aqueous regenerating agents.