Method of hydrogenating iso-alpha acids in a buffered solution

Details Method of hydrogenating iso-alpha acids in a buffered solution Method of hydrogenating iso-alpha acids in a buffered solution

C - Chemistry, Metallurgy

12

C

C12C 5/02 (2006.01) C07C 45/00 (2006.01) C12C 3/00 (2006.01) C12C 11/00 (2006.01)

Patent

CA 2390532

A method of preparing tetrahydroiso-.alpha.-acids from iso-.alpha.-acids is disclosed wherein the reaction medium is a buffered, aqueous alcoholic solution. The method can also employ up to 85 % w/w spent hydrogenation catalyst. The method advantageously avoids the formation of undesirable side products.

L'invention concerne une méthode de préparation d'acides tétrahydroiso-.alpha. à partir d'acides iso-.alpha. dans laquelle le milieu de réaction est une solution tamponnée aqueuse alcoolique. La méthode peut également utiliser jusqu'à 85 % en poids d'un catalyseur d'hydrogénation usé. La méthode évite avantageusement la formation de produits secondaires indésirables.

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