Utilizing Organic Liquid Patents (Class 426/428)
  • Patent number: 4315036
    Abstract: An aqueous extract of tea, containing native tea tannins and caffeine, is cooled to provide an aqueous solubles phase containing cold-water soluble components of the extract, including a minor portion of the caffeine, and an insolubles phase containing tea tannins complexed with a major portion of the caffeine. The aqueous solubles phase is separated from the insolubles phase, and the latter is subjected to decaffeination to provide decaffeinated tannins which may then be recombined with the aqueous solubles phase. The resulting treated extract from which the major portion of the caffeine has been removed can be dried or, if desired, subjected to further decaffeination and thereafter dried to provide a cold-water-soluble decaffeinated tea. Further features of the invention are set forth in the following description.
    Type: Grant
    Filed: January 12, 1978
    Date of Patent: February 9, 1982
    Assignee: Societe d'Assistance Technique pour Produits Nestle S.A.
    Inventors: Saeed A. Husaini, Richard T. Liu
  • 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
  • Patent number: 4279937
    Abstract: Liquid coffee extracts are decaffeinated using a solvent system which comprises benzyl alcohol.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: July 21, 1981
    Assignee: The Procter & Gamble Co.
    Inventors: Rudolf G. K. Strobel, Richard A. Eich
  • Patent number: 4276315
    Abstract: Liquid propane, liquid butane or mixtures thereof at a temperature of from 30.degree. C. to 95.degree. C. is employed to selectively remove caffeine from moistened green coffee. The resulting decaffeinated coffee is then roasted and processed to ground or soluble coffee products which will possess the flavor and aroma of comparable non-decaffeinated coffee products.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: June 30, 1981
    Assignee: General Foods Corporation
    Inventors: Saul N. Katz, Martin Gottesman
  • Patent number: 4256774
    Abstract: Coffee beans are decaffeinated using a solvent system which comprises benzyl alcohol.
    Type: Grant
    Filed: May 24, 1978
    Date of Patent: March 17, 1981
    Assignee: The Procter & Gamble Company
    Inventors: Rudolf G. K. Strobel, Richard A. Eich
  • 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
  • Patent number: 4237288
    Abstract: A process is disclosed wherein the decaffeination of solutions of caffeine in fatty media is effected with hydrophilic, phenol/formaldehyde polymeric resins having phenolic functional groups. In particular, the solutions are contacted with resin to effect decaffeination and the solvent medium is recovered, whereas the exhausted resin containing adherent caffeine and any non-caffeine solids may be regenerated for re-use. Other features of the invention are described in the specification.
    Type: Grant
    Filed: May 17, 1979
    Date of Patent: December 2, 1980
    Assignee: Societe d'Assistance Technique pour Produits Nestle S.A.
    Inventor: Dean F. Rushmore
  • Patent number: 4228196
    Abstract: Precooked potato products are prepared by a process wherein the potatoes are washed, peeled, and treated whole or cut into pieces. The so-prepared potatoes are cooked at a temperature below the temperature at which sloughing of the potato surface would occur if the whole potato were cooked to its center at that temperature. Then, the potatoes are heated in air and cooked again at a temperature of about 50.degree. to 100.degree. C. Following the last cooking procedure the potatoes are frozen, chilled, or retorted to preserve them in the absence of starch suspensions. To prepare them for consumption the potatoes can be fried or boiled.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: October 14, 1980
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Merle L. Weaver, Keng C. Ng
  • Patent number: 4207352
    Abstract: A process for the decaffeination of raw coffee beans. Coffee beans containing 15 to 55 percent water are treated with the ester of an organic acid, in combination with a ketone.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: June 10, 1980
    Assignee: decofa Kaffee-Bearbeitungs-GmbH, Fabrikenufer
    Inventors: Hans-Albert Kurzhals, Klaus F. Sylla
  • Patent number: 4167589
    Abstract: 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.
    Type: Grant
    Filed: April 26, 1977
    Date of Patent: September 11, 1979
    Inventors: Otto Vitzthum, Peter Hubert
  • Patent number: 4113886
    Abstract: Aqueous vegetable extracts such as extracts of tea or green or roasted coffee are decaffeinated by permitting caffeine to diffuse through at least one porous, hydrophilic membrane and a water-immiscible solvent phase and into a water phase. The solvent may be either internal to a single membrane or positioned between two spaced-apart membranes.
    Type: Grant
    Filed: September 28, 1977
    Date of Patent: September 12, 1978
    Assignee: General Foods Corporation
    Inventor: Saul Norman Katz
  • Patent number: 4087562
    Abstract: Decaffeination of green coffee is achieved by extracting caffeine from either green coffee beans or an aqueous extract of green coffee beans by means of diethyl succinate.
    Type: Grant
    Filed: September 18, 1975
    Date of Patent: May 2, 1978
    Assignee: General Foods Corporation
    Inventors: Gary Victor Jones, Joseph Francis Coogan, III
  • Patent number: 4081563
    Abstract: A water extract of green coffee beans is dried and this dried powder is extracted with a solvent for caffeine such as ethanol. The decaffeinated solids are rehydrated and either reincorporated into the water-extracted green coffee which is then roasted and ground or used as a caffeine-deficient extraction medium for decaffeinating green coffee.
    Type: Grant
    Filed: January 28, 1976
    Date of Patent: March 28, 1978
    Assignee: General Foods Corporation
    Inventors: Stephen F. Hudak, James P. Mahlmann
  • Patent number: 4044162
    Abstract: The flavor and aroma of decaffeinated coffee is made to more closely resemble that of undecaffeinated coffee by virtue of a process involving contacting green coffee with sucrose.
    Type: Grant
    Filed: November 14, 1973
    Date of Patent: August 23, 1977
    Assignee: General Foods Corporation
    Inventors: Frank Lando, Charles Leonard Teitelbaum
  • Patent number: 3989849
    Abstract: Improved flavor of commercially decaffeinated coffee is accomplished by rapidly drying the wet decaffeinated beans with radio frequency heating the thermal and radio frequency energies required and the wavelength and duration of exposure to the same being sufficient to impart a porous structure to the bean without rupturing the same.
    Type: Grant
    Filed: March 23, 1973
    Date of Patent: November 2, 1976
    Assignee: General Foods Corporation
    Inventors: Harvey P. Fogel, Irving Holzberg