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Preparation of di(2-ethylhexyl)1,2-cyclohexane dicarboxylate by hydrogenation

FEI Yanan,ZHAO Jia,LI Xiaoguo,SUN Guofang,GAO Peng,ZHENG Xiuxin,LIU Youpeng,YU Haibin   

  1. CNOOC Tianjin Chemical Research & Design Institute,Tianjin 300131,China
  • Online:2014-11-01 Published:2014-11-05

加氢法生产环己烷1,2-二甲酸二(2-乙基己)酯工艺

费亚南,赵甲,李孝国,孙国方,高鹏,郑修新,刘有鹏,于海斌   

  1. 中海油天津化工研究设计院,天津 300131

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

摘要: 以邻苯二甲酸二(2-乙基己)酯(DEHP,工业级)为原料,采用固定床加氢工艺和贵金属Ru-Pd催化剂,制备环己烷1,2-二甲酸二(2-乙基己)酯。分别考察了温度、压力、空速、氢气与原料的体积比对反应活性的影响。试验结果表明:在反应温度190℃、压力15MPa、体积空速0.5h?1、氢气与原料的体积比为800∶1的条件下,原料DEHP转化率保持在99.99%以上,目标产物选择性高于99.7%。连续运行1000h,催化剂仍具有优异的加氢活性。

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