Patents Assigned to Atlantic Research Institute Limited
  • Method of isomerizing humulone to isohumulone by catalytic acceleration with metal salts
    Patent number: 4234516
    Abstract: The isomerization of humulone or a humulone-containing material is carried out by isomerization at elevated temperature and a pH below 9 in a liquid medium containing at least one salt of a bi-valent metal or of cerium.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: November 18, 1980
    Assignee: Atlantic Research Institute Limited
    Inventors: Horst Koller, Alfons E. Hartl, Gerhard Kirchner
  • Method of acylation of phloroglucinol
    Patent number: 4053517
    Abstract: A method of acylation of phloroglucinol in the presence of a Friedel Crafts catalyst which is effected in the presence of nitromethane and dichloromethane so as to produce an acylphloroglucinol. The acylphloroglucinol is reacted with a compound selected from .gamma.,.gamma.-dimethyl allyl bromide and 2-methyl-but-3-ene-2-ol in the presence of a weak Lewis acid and in an organic solvent to produce a 4-desoxyhumulone which is then oxidized to produce a corresponding humulone.
    Type: Grant
    Filed: May 5, 1976
    Date of Patent: October 11, 1977
    Assignee: Atlantic Research Institute Limited
    Inventors: Wolfgang Reininger, Alfons Hartl
  • Process of catalytic oxidation of lupulones to hulupones
    Patent number: 4013721
    Abstract: A method for the production of hulupones by oxidizing lupulones with oxygen in the presence of a catalyst in a polar alkaline medium. The catalysts used include noble metals, oxides of transition metals and particularly oxide metals of Groups IB and VII B, and bismuth oxide on a carrier of kieselguhr, activated carbon, calcium phosphate, magnesium oxide, dolomite, fired clay and strongly acid cation exchangers.
    Type: Grant
    Filed: September 13, 1973
    Date of Patent: March 22, 1977
    Assignee: Atlantic Research Institute Limited
    Inventors: Wolfgang Reininger, Alfons Hartl
  • Method of isomerizing humulone to isohumulone by catalytic acceleration with metal salts
    Patent number: 3952061
    Abstract: The isomerization of humulone or a humulone-containing material is carried out by isomerization at elevated temperatures and a pH below 9 in a liquid medium containing at least one salt of a bi-valent metal or of cerium.
    Type: Grant
    Filed: May 30, 1973
    Date of Patent: April 20, 1976
    Assignee: Atlantic Research Institute Limited
    Inventors: Horst Koller, Alfons E. Hartl, Gerhard Kirchner