高芳烃含量重质馏分油加工方案的技术探讨

以中海油高芳烃含量减三线馏分油为原料，进行橡胶增塑剂生产方案比较。结果表明:采用中压加氢和糠醛抽提组合工艺可以生产CA为12.9%的芳烃橡胶增塑剂产品；采用单段高压加氢处理工艺可以生产CA为13.4%的芳烃橡胶增塑剂产品，副产品为轻质燃料；采用高压加氢和糠醛抽提组合工艺可以生产CA为18.2%的芳烃橡胶增塑剂产品，副产的抽余油采用高压加氢降凝工艺可以生产CN为40%以上的环烷基橡胶增塑剂产品；采用三段高压加氢组合工艺技术可以生产CN为40%以上环烷基橡胶增塑剂产品。根据4种工艺技术评价的结果，推荐高压加氢处理+糠醛抽提、抽余油三段串联高压加氢组合工艺为较优的工艺路线。

DISCUSSION ON PROCESSING SCHEME FOR HEAVY DISTILLATE WITH HIGH AROMATIC CONTENT

The comparative studies of schemes were introduced for processing CNOOC SZ36-1 vacuum No.3 cut with high aromatic content to produce rubber plasticizer. The results showed that the rubber plasticizer with CA value of 12.9% was produced by a combined process of medium pressure hydrotreating and furfural extraction; the rubber plasticizer with CA of 13.4% could be obtained by one stage high pressure hydrotreating process with a light fuel as by-products. While the rubber plasticizer with CA 18.2% was gained by the combined process of high pressure hydrotreating and one stage furfural extraction, then the furfural raffinate oil could be used to produce naphthene-base rubber plasticizer having CN above 40% by hydro-dewaxing. The 3 stage all hydro-processing technology, consisting of high pressure hydrotreating-hydrodewaxing-hydrofinishing can produce naphthene-base rubber plasticizer having CN above 40%. Among these schemes, the combined process of high pressure hydrotreating process-one stage furfural extraction -raffinate oil hydrodewaxing is recommended as the best process.