Preparation of tetrahydroiso-alpha-acids by the hydrogenation of the metal salts of iso-alpha-acids

摘要

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 DEG -50 DEG C. to form tetrahydroiso- alpha -acids.