Preparation of tetrahydroiso-.alpha.-acids by the hydrogenation

Details Preparation of tetrahydroiso-.alpha.-acids by the hydrogenation Preparation of tetrahydroiso-.alpha.-acids by the hydrogenation

1996-10-30

1998-06-16

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568350, 426600, C07C 4562

Patent

active

057673195

ABSTRACT:
Tetrahydroiso-.alpha.-acids are prepared from iso-.alpha.-acids metal salts by hydrogenating the salts in a reaction solvent of a lower alkanol containing about 5% to about 20% w/w water and in the presence of up to about 5-50 psig hydrogen and a hydrogenation catalyst at about 30.degree.-50.degree. C. to form tetrahydroiso-.alpha.-acids.

REFERENCES:
patent: 3765903 (1973-10-01), Clarke et al.
patent: 4644084 (1987-02-01), Cowles et al.
patent: 4666731 (1987-05-01), Todd, Jr.
patent: 5013571 (1991-05-01), Hay
patent: 5200227 (1993-04-01), Guzinski et al.
patent: 5600012 (1997-02-01), Poyner et al.

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