The present disclosure pertains to processes for the simultaneous co-production of 2,2,4,4-tetramethylcyclobutane-1,3-diol and 1,4-cyclohexanedimethanol by hydrogenation 2,2,4,4-tetramethylcyclobutane-1,3-dione and dimethylcyclohexane-1,4-dicarboxylate, respectively, under hydrogenation conditions of temperature and pressure.