Hydrogenation of hop soft resins using CO.sub.2
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United States of America Patent
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Feb 1, 2000
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N/A
app pub date -
Mar 26, 1996
filing date -
Mar 26, 1996
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Expired
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Abstract
Carbon dioxide is used as a reaction solvent in the hydrogenation of organic compounds. The carbon dioxide is preferably a liquid or a supercritical fluid. The hydrogenation method can be used advantageously in methods for making tetrahydroiso-alpha-acids from alpha-acids, iso-alpha-acids, or beta-acids. If beta-acids are used to make tetrahydroiso-alpha-acids, an acidic lower alcohol is preferably added to the carbon dioxide reaction medium to act as a promoter.
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