Conversion of Fischer-Tropsch heavy product to high quality jet fuel

A process for producing a high-quality jet fuel which comprises hydrotreating a wide boiling range hydrocarbon fraction of Fischer-Tropsch synthesis comprising olefins and oxygenates and boiling in the range of about 350.degree. to 850.degree. F;

• separating the product of hydrotreating to produce a 650.degree. F minus overhead fraction and a 650.degree. F plus bottoms fraction;
• separating the overhead 650 minus fraction to produce a first overhead naphtha fraction comprising 350.degree. F minus material from a 350.degree. F plus bottoms fraction;
• admixing at least a portion of said 350.degree. F plus bottom fraction with said 650.degree. F plus bottoms above recovered;
• contacting the mixture thus formed with a catalyst comprising a special zeolite having a silica to alumina ratio of at least 12, and a constraint index of 1 to 12 at a temperature in the range of about 500.degree. to 800.degree. F, under hydrogen pressure in the range of about 100 to 800 psig and at a space velocity in the range of about 0.5 to 5 LHSV, to produce a product comprising a C.sub.5 to 350 naphtha boiling range hydrocarbon fraction and a higher boiling distillate boiling range fraction;
• and
• separating said higher boiling distillate fraction into a jet fuel boiling fraction and a higher boiling diesel fuel fraction.