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 means of vacuum distillation, n-d-m, E-d-m, mass spectrum and elemental analysis. The fraction compositions, hydrocarbon compositions and element contents of the six catalytic cracking stocks were determined. The effect of compositions of various catalytic stocks on catalytic cracking reaction was discussed. Results show that the gum and asphaltene in the six stocks were lower except residual oil, but saturated hydrocarbon were all high; aromatics in the six stocks except slurry oil and sweat oil were lower, which are suitable for catalytic cracking units. There will be a big potential uses for the residual oil as catalytic stocks.