Decolorization of polyhydric alcohol, especially trimethylolpropane useful as cross-linker for polyester or polyurethane, involves hydrogenating distilled alcohol over macroporous supported heterogeneous transition metal catalyst

摘要

A process for improving the color number of polyhydric alcohols (I), especially trimethylolpropane (TMP), involves catalytic hydrogenation of (I), which is purified by distillation after production. Hydrogenation is carried out in the presence of a macroporous, supported heterogeneous catalyst containing sub-group VII-X metal(s) as the active metal.