| 摘要 |
PURPOSE:To obtain glycine useful as a brewing chemical, and an additive in the processing of foods such as meat, refreshing drink, instant food, etc., easily and economically, by heating an oxamic acid and hydrogen gas in liquid phase in the presence of a Ru catalyst. CONSTITUTION:The objective compound can be produced by dissolving oxamic acid and/or its derivative in a solvent such as water, lower alcohol, etc., and heating the solution at 10-170 deg.C, preferably at 50 deg.C for 3-4hr, in the presence a Ru catalyst while contacting hydrogen gas to the solution at room temperature under a pressure between atmospheric pressure and 100kg/cm<2>. The Ru catalyst is prepared by supporting Ru to activated carbon, CaCO3, etc., and the amount is 0.01-20wt%, preferably 1-10wt% based on the oxamic acid used as the raw material. The reaction is preferably carried out by adding an acid, especially HCl to the reaction system. |
