Production of diesel fuel from Mangyshlak petroleum

Summary

• 1. The DL and DS grades of diesel oil, with boiling ranges 180–350°C, cannot be obtained from Mangyshlak petroleum owing to the high setting point. The setting point is conveniently reduced to the standard value by deparaffination of the end 250–350°C fraction and mixing with the 180–250°C undeparaffinized initial fraction.

• 2. The 250–350° fraction can be deparaffinized in a solution of dichloroethane. By cooling to −20°C we obtain a diesel fuel component with setting point −14°C.

  Diesel fuel of DS grade with boiling range 180–350°C, obtained by mixing the head fraction with the deparaffinized end fraction, has a setting point of −18°C.

• 3. By a single repulping in dichloroethane of the slack wax obtained by deparaffinization of the 250–350° fraction, followed by filtration at −20°C, we obtain paraffin with setting point 28°C and 0.2% aromatic compounds, without finishing.