Abstract: 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.
Abstract: 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.
Abstract: Method of removing caffeine from vegetable materials using a solvent containing two components:(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.
Type:
Grant
Filed:
June 12, 1978
Date of Patent:
March 10, 1981
Assignee:
Hag Aktiengesellschaft
Inventors:
Ludwig Roselius, Hans-Albert Kurzhals, Peter Hubert
Abstract: 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.
Type:
Grant
Filed:
February 25, 1977
Date of Patent:
September 18, 1979
Assignee:
HAG Aktiengesellschaft
Inventors:
Ludwig Roselius, Hans-Albert Kurzhals, Klaus F. Sylla, Peter Hubert
Abstract: 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.
Type:
Grant
Filed:
February 10, 1978
Date of Patent:
January 16, 1979
Assignee:
HAG Aktiengesellschaft
Inventors:
Manfred Barthels, Peter Werkhoff, Otto Vitzthum
Abstract: A bottom closure for a chemical reactor having a cylinder extension whose attachment opening is closed by a closing part with said closing part bearing upon the conical counter-surface of the attachment opening and protruding a sufficient distance into the interior of the reactor that solid bridges or arches formed from solid material within the reactor are destroyed during the opening of the closure.
Type:
Grant
Filed:
March 18, 1976
Date of Patent:
November 29, 1977
Assignee:
HAG Aktiengesellschaft
Inventors:
Herbert Grebe, Wolfgang Hartwig, Johann Kohler, Rudolf Rothe, Karl-Friedrich Schroder
Abstract: A method for transferring a highly compressed gas from a reactor into a storage tank with condensation of the gas is disclosed in which the gas is at first liquefied and cooled to a temperature below the storage temperature, then the liquefied gas is expanded and transferred into the storage tank, and after the pressure in the reactor has dropped to about the pressure in the storage tank, the remaining gas in the reactor is transferred by a compressor from the reactor into the storage tank.