| 摘要 |
PURPOSE:To prepare a sugar alcohol useful as a food additive, industriual raw material, and raw material of pharmaceuticals, in high purity, by the thermal reaction of an aqueous solution of saccharides using a highly durable catalyst composed of ruthenium and nickel supported on activated charcoal, under hydrogen pressure. CONSTITUTION:A sugar alcohol is prepared by heating an aqueous solution of saccharides using a catalyst composed of ruthenium and nickel supported on activated charcoal, under hydrogen pressure. The amount of nickel on the activated charcoal is 0.05-0.5pt.wt. per 1pt.wt. of ruthenium. The sugar alcohol obtained has a purity of as high as >=99%. There is little isomerization, decomposition and polymerization of saccharide even by increasing the amount of catalyst in the catalytic hydrogenation of the saccharides. |
