Studiengesellschaft Kohle Mbh

Hag Aktiengesellschaft

Other

Otto Vitzthum

Peter Hubert

Wilhelm Roselius

Peter Werkhoff

Manfred Barthels

Wolfgang Sirtl

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.

Process for the extraction of caffeine from super-critical solutions

A method of extracting coffee oil containing aromatic constituents in high yield and in stable form by extracting solid, roasted coffee with dry carbon dioxide under super-critical conditions of temperature and pressure.

Method of extracting coffee oil containing aroma constituents from

Process for the preparation of spice extracts by extraction of the natural spice with a supercritical gas such as carbon dioxide in which the aroma contents are first extracted with a dry gas, the flavor contents are then extracted with a moist gas and the extracted materials recovered and mixed.

Process for the production of spice extracts

A caffeine free black tea product is produced by an extraction procedure with a supercritical gas such as carbon dioxide in which first the aromatic content of the tea is extracted with dry gas, then the caffeine content is extracted with wet gas, and finally the decaffeinated tea is reimpregnated with the aromatic content.

Method for the manufacture of caffeine free black tea

Process for extracting nicotine is disclosed in which tobacco is exposed to an extracting solvent in either liquid or gaseous state at temperatures below about 100.degree. C. and at high pressures. The aroma generating substances can be removed by conducting the extraction with the tobacco in dry condition. Thereafter the tobacco can be moistened, and on further contacting the nicotine is removed. The aroma generating substances can then be recombined with nicotine free tobacco.

Process for the extraction of nicotine from tobacco

A pressure relief valve for packages in which the valve element comprises a liquid impregnated porous element covering outlet openings in the package, with the liquid layer in the porous element being torn open by package contents pressures in excess of a predetermined value to permit gas outflow from the package.

Pressure relief valve for packing containers

Process for the preparation of spice extracts by extraction of the natural spice with a supercritical gas such as carbon dioxide in which the aroma contents are first extracted with a dry gas; the flavor contents are then extracted with a moist gas and the extracted materials recovered and mixed.

Process for extraction of hops utilizing supercritical gases such as carbon dioxide.

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Bremen, Germany

Otto Vitzthum