Patents Assigned to HAG Aktiengesellschaft
  • Process for the extraction of caffeine from super-critical solutions
    Patent number: 4411923
    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.
    Type: Grant
    Filed: February 9, 1981
    Date of Patent: October 25, 1983
    Assignee: HAG Aktiengesellschaft
    Inventors: Peter Hubert, Otto Vitzthum
  • Process for decaffeinating green coffee
    Patent number: 4308291
    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.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: December 29, 1981
    Assignee: Hag Aktiengesellschaft
    Inventors: Peter Werkhoff, Peter Hubert
  • Method for the selective extraction of caffeine from vegetable materials
    Patent number: 4255458
    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
  • Process of extracting stimulants from coffee
    Patent number: 4168324
    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
  • Pressure relief valve for packing containers
    Patent number: 4134535
    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
  • Bottom closure for a chemical reactor
    Patent number: 4060394
    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
  • Method for transferring a highly compressed gas from a reactor to a storage tank with condensation of the gas
    Patent number: 4049409
    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.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: September 20, 1977
    Assignee: HAG Aktiengesellschaft
    Inventors: Rudolf Rothe, Johann Kohler