加氢裂化尾油临氢降凝催化剂及工艺研究

以ZSM-5分子筛为载体制备了Ni/Ca/ZSM-5临氢降凝催化剂，研究了催化剂中Ni、Ca改性对润滑油基础油凝点、收率和黏度指数的影响。结果表明，Ni、Ca改性后，催化剂的裂化活性降低，润滑油基础油的收率和黏度指数升高。以加氢裂化尾油为原料，对Ni-Ca/ZSM-5催化剂进行加氢工艺考察，最佳反应条件为：反应温度310 ℃、体积空速3.0 h-1、反应压力15 MPa、氢油体积比500，在此条件下，润滑油基础油凝点为－17 ℃，黏度指数为93，收率为72%。

PREPARATION OF HYDRODEWAXING CATALYST AND PERFORMANCE EVALUATION FOR HYDROCRACKING TAIL OIL

A Ni/Ca /ZSM-5 catalyst which used ZSM-5 molecular sieve as support was prepared. The performance of Ni and Ca modified ZSM-5 as hydrodewaxing catalyst in the melting point, yield and viscosity index of lube base oil was studied using hydrocracking tail oil as feedstock. The results showed that the cracking activity of the hydrodewaxing catalyst decreased and the yield and viscosity index of the lube base oil increased. For hydrocracking tail oil, the optimal reaction conditions were reaction temperature of 310 ℃, LHSV of 3.0 h-1, hydrogen pressure of 15 MPa and hydrogen to oil ratio of 500. Under the optimal conditions, the melting point of the produced lube base oil was －17 ℃, the viscosity index and the yield were 93 and 72%, respectively