Evonik Degussa Gmbh

Evonik Operations Gmbh

Helmut Hausner

Franz Michlbauer

Johann Wiesmueller

Roland Wursche

Ralf Kahleyss

Florian Schwager

Claudius Neumann

Guenther Oberbauer

Harald Kaiser

A process for producing cycloalkenamer-containing compositions involves converting at least one cycloalkene by ring-opening metathetic polymerization to obtain a polyalkenamer-containing product mixture. The product mixture is worked up to remove monomers and oligomers of the cycloalkenes to obtain the polyalkenamer-containing composition by extraction with CO. The extraction involves at least two stages: an extraction with liquid COunder the supercritical conditions, and then an extraction with supercritical CO. Such cycloalkenamer-containing compositions can be used, for example, in the field of packaging materials, especially for food and drink.

Process for preparing polyalkenamers for packaging applications

The present invention relates to a process for continuous extraction of an aqueous and/or fat-containing liquid phase F comprising aroma chemicals with a gas G in the liquid or supercritical state.

Process for extraction of aroma chemicals from fat-containing and/or aqueous liquid phases

A carnosic acid-rich plant extract can be produced by extracting a dried and comminuted plant material containing carnosic acid with supercritical COat a pressure of at least 200 bar and at a temperature of at most 100&#xb0; C. In a first step, supercritical COin a quantity of 10 to 50 kg of COper kg of plant material is passed through the plant material to obtain a first COextract. In a second step, additional supercritical COis passed through the plant material to obtain a second COextract, and a carnosic acid-rich plant extract is separated from the second COextract by lowering the pressure.

Method for producing a carnosic acid-rich plant extract

Growing community of inventors

Trostberg, Germany

Helmut Hausner