Petroleum gas (complex hydrocarbons from fractionation of catalytic cracked gas oil stream, treated to remove hydrogen sulfide); Petroleum gases, C4-rich, acid free
Gases (petroleum), crude distn. and catalytic cracking; Refinery gas (complex combination produced by crude distillation and catalytic cracking processes, consisting of hydrogen, hydrogen sulfide, nitrogen, carbon monoxide and paraffinic and olefinic hydrocarbons)