反应详情

Using the method described in Example 1(b), 1.4 parts per hour of a 60 percent strength by weight solution of 1-hydroxymethyl-hexahydro-benzaldehyde in a 1:1 water-methanol mixture are hydrogenated, over the catalyst prepared as described in Example 1(a), at 130° C. and 30 bar, with a throughput of 0.42 part of 1-hydroxymethyl-hexahydrobenzaldehyde per liter of catalyst per hour. The conversion is 99 percent. The hydrogenated material is fractionated through a packed column. After first runnings of water, methanol and small amounts of hexahydrobenzyl alcohol and 1-hydroxymethyl-hexahydrobenzaldehyde, 1,1-di-hydroxymethylcyclohexane, of boiling point 120°-122° C./3 mbar (melting point 90°-92° C.), is obtained in an amount corresponding to 0.8314 part per hour. This is equivalent to a yield of 97.6% of theory, based on starting material.

1. customprepared
2. customas described in Example 1(a), at 130° C.