| abstract |
The present invention relates to process of preparing tetrahydro isohumulon from hop extractum or lupulone oil. The process includes separating lupulone from hop extractum or lupulone oil, hydrogenating lupulone to obtain tetrahydro humulon, and final fast oxidation and isomerization with air or pure oxygen in alkaline alcohol solution in the presence of palladium-containing carbon powder or active carbon as catalyst to obtain tetrahydro isohumulon. The process with catalyst action has high speed and high yield. The product is applied in beer or other food, and has enhanced foaming function, bacteriostasis function, light resistance and bitter taste over one time higher than that of isohumulon. |