Catalytic cracking of the 280–350°C fraction of Upper Cretaceous oil of the Checheno-Ingush autonomous Republic on a zeolite catalyst

Conclusions

• 1. Cracking of the 280–350°C fraction of Upper Cretaceous Checheno-Ingush petroleum on a zeolite catalyst is characterized by an increased degree of conversion of the feedstock and a higher yield of the naphtha fraction in comparison with cracking on an aluminosilicate catalyst.

• 2. At 400–500°C and a volumetric flow rate of 0.7 h⁻¹, a zeolite catalyst is 6–10 wt.% more active and 11–15 wt.% more selective than an aluminosilicate catalyst at a degree of conversion equal to 65–75 wt.%.

• 3. Stable gases obtained by cracking on a zeolite catalyst contain 6.0–7.3 wt. % of the ethane-ethylene fraction (56–64 wt.% of ethylene), 27.5–29.0 wt.% of the propane-propylene fraction (60–68 wt.% of propylene), 60–62 wt.% of the butane-butylene fraction (59–62% of isobutane, 13.5–15.6% of n-butane, and 22–28% of butylenes).

• 4. The C₅-150°C naphtha fraction, obtained at 450°C and a volumetric flow rate of 1.2 h⁻¹ on a zeolite catalyst, contains 41.0 wt. % of isoparaffins, 28.0 wt. % of aromatic hydrocarbons, 13.3 wt.% of naphthenes, 10.4 wt.% of unsaturated hydrocarbons, and 7.0 wt. % of normal paraffins.

• 5. The diesel fractions obtained contain 40–58 wt.% of aromatic hydrocarbons.