Studies on pretreatment of catalytic cracking slurry oil with added furfural

In the experiment, the furfural added compound agent was applied to treat catalytic cracking slurry oil in order to utilize the saturated hydrocarbon and condensed-nuclei aromatics reasonably and soundly. The added agent could improve the dissolubility and selectivity of furfural and enhance the recovery and quality of treated oil. The optimum condition was as follows: compound ratio was 0.5:1 the added quantities were 8% relative to furfural volume; the temperature was 50 degrees C; the solvent/oil ratio was 0.5:1. Under the condition, compared with that of furfural extraction, the recovery of treated oil was increased 14.8 wt%, the quality of treated oil also had been improved to some extent, and thus, the treated oil could be used as good stockfeed of catalytic cracking. The extract oil contained abundant condensed-nuclei aromatics, which could be used as good stockfeed to produce a high value-added chemical engineering product.