Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1995-04-06
1997-02-04
Reamer, James H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568350, 426600, C07C 4567
Patent
active
056000120
ABSTRACT:
Tetrahydro-iso-.alpha.-acids ("THIAA") are prepared directly from iso-.alpha.-acids ("IAA") by hydrogenation. Free IAA are first dissolved in ethanol. The solution is then hydrogenated in the presence of a particular type of noble metal catalyst. Hydrogenation is controlled naturally by the reaction between the catalyst and the IAA so that the IAA will be selectively converted to THIAA without unacceptable perhydrogenation into other forms.
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Hysert David W.
Poyner William R.
Smith Geoffrey
Westwood Keith T.
John I. Haas, Inc.
Reamer James H.
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