加氢裂化尾油异构脱蜡-补充精制产品探索研究

Exploration research on products by isomeric dewaxing-supplementary refining of hydrocracking tail oil

以中海油某炼厂加氢裂化装置尾油为原料,采用该炼厂石蜡基润滑油加氢装置异构脱蜡-补充精制段反应器现用催化剂,进行异构脱蜡-补充精制试验,考察了不同反应温度下生产高档润滑油基础油、化妆品级白油、食品级白油的可行性。结果表明,不同反应温度下均无法制备出高黏度指数(>100)且倾点合格的润滑油基础油;在反应压力15 MPa、空速1.0 h^(-1)、氢油体积比800∶1、异构脱蜡和补充精制段反应温度分别为330、240℃条件下,加氢生成油300~380℃馏分段(收率18.48%)和>380℃馏分段(收率36.79%)分别可以达到食品级白油(GB 1886.215—2016)、化妆品级白油(NB/SH 0007—2015)产品指标要求。

Taking hydrocracking tail oil from a refinery of CNOOC as raw material,isomerization dewaxing and supplementary refining test are performed over the catalyst in service to investigate the feasibility of producing high-grade lubricating base oil,cosmetic-grade white oil and food-grade white oil at different reaction temperatures.The results show that the base oil with high viscosity index(>100)and qualified pour point cannot be prepared at any reaction temperatures.The distillate at 300-380℃(a yield of 18.48%)and the distillate exceeding 380℃(a yield of 36.79%)can respectively meet the product index requirements of food-grade white oil(GB 1886.215—2016)and cosmetics-grade white oil(NB/SH 0007—2015)when reaction pressure is 15 MPa,space velocity is 1.0 h^(-1),the ratio hydrogen to oil is 800∶1 and the temperatures of isomerization dewaxing and supplementary refining sections are 330℃and 240℃,respectively.