Synthesis of Dicyclohexyl phthalate with a New Polymer-supported Titanate as Catalyst

A stable polymer supported titanate PVAC-1 was synthesized by reaction of titanium tetrachloride with polyvinyl alcohol in dimethyl sulfoxide and ethyl alcohol solutions.The relations between amount of catalyst,reuse times and yield of dicyclohexyl phthalate(DCHP),the relations between reaction temperature and reaction time were studied.The results showed that the catalyst has the same catalytic activity as Ti(OBu)_4,and the yield of dicyclohexyl phthalate reachs 86.5 % under reaction temperature 120～200 ℃,reaction time 7 h,catalyst amount 0.9 %～1.1 % of total raw materials,and remains yield is over 80 % after reusing 5 times.It is proved that the catalyst can be separated easily from products and can be recovered and reused.