关键词: 邻苯二甲酸二(2-乙基己)酯, 加氢, 环己烷1, 2-二甲酸二(2-乙基己)酯, 环保增塑剂

Abstract: Di(2-ethylhexyl)1,2-cyclohexane dicarboxylate was prepared，by using bis(2-ethylhexyl) phthalate (DEHP，industrial grade) as raw material，and with fixed-bed hydrogenation process and noble metal Ru-Pd catalyst. The influence of temperature，pressure，space velocity and volumetric ratio of hydrogen to oil on catalytic activity were investigated. Under process conditions of reaction temperature 190℃，pressure 15MPa，space velocity 0.5h?1 and volumetric ratio of hydrogen to oil 800∶1，DEHP conversion was above 99.99% and selectivity was higher than 99.7%. Moreover，the catalyst kept excellent hydrogenation activity during 8000h test running.

Key words: bis(2-ethylhexyl) phthalate, hydrogenation, di(2-ethylhexyl)1,2-cyclohexane dicarboxylate, environmentally-friendly plasticizer