Method for the selective extraction of caffeine from vegetable materials

US4255458A · kind A · utility

Assignee

• HAG Aktiengesellschaft · DE

Inventors

• Ludwig Roselius · Bremen, DE
• Hans-Albert Kurzhals · Hambergen, DE
• Peter Hubert · Lemwerder, DE

Key dates

• Filing date: Jun 12, 1978
• Grant date: Mar 10, 1981
• Expiry date: Jun 12, 1998

Classification

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

Abstract

Method of removing caffeine from vegetable materials using a solvent containing two components: PA1 (a) a first component which is inherently gaseous under operational conditions, and (b) a second component which, by itself, has physical properties such that a mixture of (a) and (b) is liquid at the operating temperature.