煤基加氢裂化尾油抽余油制备环保橡胶填充油的研究

PREPARATION OF ENVIRONMENTAL-FRIEDLY RUBBER PROCESSING OIL FROM RAFFINATE OF COAL-BASED HYDROCRACKING TAIL OIL

以煤基加氢裂化尾油溶剂抽余油为原料,采用临氢降凝-溶剂抽提组合工艺,开展了降低抽余油凝点和降低抽余油多环芳烃含量、制备煤基环保橡胶填充油的研究。结果表明:在压力为5.0 MPa、温度为350℃、质量空速为1.0 h-1、氢油体积比为800∶1的条件下,抽余油的凝点由26℃降低为-6℃;以糠醛为溶剂,在抽提温度为60℃、剂油质量比为2∶1的条件下,对降凝油中大于300℃馏分开展了二级逆流抽提试验,制备了多环芳烃质量分数为1.88%、芳碳率C A为12.0%的环保橡胶填充油,其主要性质满足国家标准GB T 33322—2016中环保橡胶填充油A0709的质量要求。

The coal-based environmental-friendly rubber oil was prepared using the raffinate oil of coal tar hydrocracking tail oil.The combined process of hydrodewaxing and solvent extraction was adopted to reduce the pour point and remove the polycyclic aromatic hydrocarbons in the raffinate.The results showed that the pour point of the raffinate was decreased from 26℃to-6℃at 5.0 MPa,350℃,mass space velocity of 1.0 h-1 and volume ratio of hydrogen to oil of 800∶1.Two-stage countercurrent extraction test was carried out for the fraction with boiling point higher than 300℃in the oil after hydrodewaxing by two-stage counter-current extraction with furfural as the solvent at extraction temperature of 60℃and the mass ratio of the agent to oil of 2∶1.The eco-friendly rubber oil with a polycyclic aromatic hydrocarbons content of 1.88%and a value of aromaticity(C A)of 12.0%was prepared.The main properties meet the requirement of environmental-friendly rubber oil A0709 in the national standard GB T 33322—2016.