Studiengesellschaft Kohle Mbh

Hag Aktiengesellschaft

Other

Peter Hubert

Otto Vitzthum

Hans-Albert Kurzhals

Ludwig Roselius

Wilhelm Roselius

Klaus F Sylla

Peter Werkhoff

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

A process for decaffeinating green coffee comprising treating green coffee with at least one acetal of the general formula ##STR1## wherein R.sup.1 is a hydrogen atom or a methyl group and R.sup.2 and R.sup.3 are each a methyl group or an ethyl group, as an organic solvent, and removing solvent residues by steaming the treated green coffee.

Process for decaffeinating green coffee

Method of removing caffeine from vegetable materials using a solvent containing two components:

Method for the selective extraction of caffeine from vegetable materials

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 method of producing coffee low in undesired stimulants by removing coffee wax from unroasted coffee by the use of a supercritical fluid and absorbing the coffee wax in an absorbent precharged with pure caffeine.

Process of extracting stimulants from coffee

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

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.

Growing community of inventors

Bremen-Lesum, Germany

Peter Hubert