高效液相加氢直接提高煤或合成气制乙二醇产品质量的工艺研发

Process development and research of high-efficiency liquid phase hydrogenation for directly improving quality of ethylene glycol product made from coal or syngas

介绍了传统的合格品乙二醇液相加氢与树脂吸附结合来提高煤或合成气制乙二醇产品质量的工艺流程,针对传统工艺树脂成本高且再生吸附环保压力大、聚酯级乙二酸收率低等问题,开发了高效液相加氢直接提高乙二醇产品塔侧采产品质量的工艺流程,并对高效液相加氢技术使用的催化剂性能进行了实验研究。结果表明:反应压力0.8 MPa(G),反应温度120℃~130℃,体积空速8 h-1是催化剂较为适宜的工艺参数;通过高效液相加氢技术,可以将乙二醇产品塔侧采产品指标提高至聚酯级指标。

The traditional process of liquid phase hydrogenation of industrial grade ethylene glycol combined with resin adsorption to improve the quality of ethylene glycol product made from coal or syngas was introduced.Aiming at the problems of high cost of resin,high environmental pressure of regeneration and adsorption,low yield of polyester grade ethylene glycol of the existing traditional process,a new process of high-efficiency liquid phase hydrogenation to directly improve the quality of side-drawn product from the ethylene glycol product tower was developed,and the experimental study was made on the performance of the catalyst for the high-efficiency liquid phase hydrogenation technology.The results showed that the optimized process parameters of the catalyst were reaction pressure of 0.8 MPa(G),reaction temperature of 120℃~130℃and volume space velocity of 8 h-1;and through the high-efficiency liquid phase hydrogenation technology,the side-drawn product from the ethylene glycol product tower could have its index improved to the polyester grade index.