HIGH-V. I. LUBRICATING OIL PRODUCED BY ADSORPTIVE TREATMENT OF HEAVY CATALYTIC GAS OIL.

In recent years, major attention has been directed toward the utilization of heavy catalytically cracked gas oil (CGO) as a raw material for lube oil production. Studies in this area have demonstrated the feasibility of using such raw material to produce lube oils with high viscosity indices and good thermal-oxidative stability. The work reported in this paper was devoted to the production of lube oils from CGO by adsorptive treatment with a moving bed of adsorbent, this process having been commercialized. The aluminosilicate adsorbent is a highly active agent for the removal of undesirable resinous and sulfur compounds from the CGO, along with polycyclic aromatic hydrocarbons. The feedstocks used in this work were gas oils produced by cracking a heavy distillate feedstock (from mixed Eastern medium-sulfur crudes) over amorphous and zeolitic microbead aluminosilicate catalysts at moderate cracking temperatures (fuel regime). The physicochemical properties and chemcal group composition of the CGO samples are listed. The adsorption treatment was performed in laboratory and pilot units using a commercial aluminosilicate microbead adsorbent. The desorbed oils can be used as heat transfer fluids, plasticizers, and softening agents for compounded rubbers, as well as in the production of carbon black and petrochemicals.