An analysis on the compositions of the catalytic cracking stocks from SHENBEI oil

Six catalytic cracking stocks from SHENBEI oil, which include recycle stock , coker gatch, sweat oil, residual oil and mixed feed, were analyzed by mea ns of vacuum distillation, n-d-m, E-d-m, mass spectrum and elemental analys is. The fraction compositions, hydrocarbon compositions and element content s of the six catalytic cracking stocks were determined. The effect of compo sitions of various catalytic stocks on catalytic cracking reaction was disc ussed. Results show that the gum and asphaltene in the six stocks were lowe r except residual oil,but saturated hydrocarbon were all high; aromatics in the six stocks except slurry oil and sweat oil were lower, which are suita ble for catalytic cracking units. There will be a big potential uses for th e residual oil as catalytic stocks.