Patent · US Active

Method for producing a carnosic acid-rich plant extract

US8513456B2 · kind B2 · utility

1Cited by

2References

20Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Johann Wiesmueller · Garching bei München, DE
Franz Michlbauer · Kirchweidach, DE
Ralf Kahleyss · Trostberg, DE
Helmut Hausner · Trostberg, DE

Key dates

Filing date	Oct 12, 2010
Grant date	Aug 20, 2013
Priority date	—
Expiry date	Oct 12, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D11/0288
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A carnosic acid-rich plant extract can be produced by extracting a dried and comminuted plant material containing carnosic acid with supercritical CO2 at a pressure of at least 200 bar and at a temperature of at most 100° C. In a first step, supercritical CO2 in a quantity of 10 to 50 kg of CO2 per kg of plant material is passed through the plant material to obtain a first CO2 extract. In a second step, additional supercritical CO2 is passed through the plant material to obtain a second CO2 extract, and a carnosic acid-rich plant extract is separated from the second CO2 extract by lowering the pressure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.