A new catalyst hydroisomerizes C18 paraffins from fatty acids to a high degree to produce a composition with acceptable freeze point which retains 18 carbon atoms in the hydrocarbon molecule for jet fuel. We have discovered a fuel composition comprising at least 14 wt % hydrocarbon molecules having at least 18 carbon atoms and a freeze point not higher than 40 C. The composition also may exhibit a exhibiting a final boiling point of no more than 300 C. The hydroisomerization process can be once through or a portion of the product diesel stream may be selectively hydrocracked or recycled to hydroisomerization to obtain a fuel composition that meets jet fuel specifications.

A new catalyst hydroisomerizes C18 paraffins from fatty acids to a high degree to produce a composition with acceptable freeze point which retains 18 carbon atoms in the hydrocarbon molecule for jet fuel. We have discovered a fuel composition comprising at least 14 wt % hydrocarbon molecules having at least 18 carbon atoms and a freeze point not higher than 40 C. The composition also may exhibit a exhibiting a final boiling point of no more than 300 C. The hydroisomerization process can be once through or a portion of the product diesel stream may be selectively hydrocracked or recycled to hydroisomerization to obtain a fuel composition that meets jet fuel specifications.

Specific embodiments of the present invention provide a hydrocracking process for converting low value-added heavy hydrocarbon distillates into high value-added hydrocarbon distillates using a supercritical solvent as a medium.

Specific embodiments of the present invention provide a hydrocracking process for converting low value-added heavy hydrocarbon distillates into high value-added hydrocarbon distillates using a supercritical solvent as a medium.

Provided is a continuous process for converting waste plastic into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery hydrocracking unit. A liquid petroleum gas C.sub.3 olefin/paraffin mixture is recovered from the hydrocracking unit. The C.sub.3 paraffins and C.sub.3 olefins are separated into different fractions with the C.sub.3 olefin fraction passed to a propylene polymerization reactor, and the C.sub.3 paraffin fraction passed optionally to a dehydrogenation unit to produce additional propylene. A heavy fraction can also be recovered from the hydrocracking unit and passed to an isomerization dewaxing unit to prepare base oil.

Provided is a continuous process for converting waste plastic into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery hydrocracking unit. A liquid petroleum gas C.sub.3 olefin/paraffin mixture is recovered from the hydrocracking unit. The C.sub.3 paraffins and C.sub.3 olefins are separated into different fractions with the C.sub.3 olefin fraction passed to a propylene polymerization reactor, and the C.sub.3 paraffin fraction passed optionally to a dehydrogenation unit to produce additional propylene. A heavy fraction can also be recovered from the hydrocracking unit and passed to an isomerization dewaxing unit to prepare base oil.

The present disclosure refers to systems and methods for efficiently converting a C.sub.1-C.sub.3 alkane such as natural gas to a liquid C.sub.2-C.sub.10 product and hydrogen. Generally, the process comprises flowing the C.sub.1-C.sub.3 alkane through a plurality of tubes within a vessel wherein the tubes house a catalyst for converting the C.sub.1-C.sub.3 alkane to the liquid C.sub.2-C.sub.10 product and hydrogen. The C.sub.1-C.sub.3 alkane is heated under suitable conditions to produce the liquid C.sub.2-C.sub.10 product and hydrogen. Advantageously, the C.sub.1-C.sub.3 alkane is heated by burning a fuel outside the tubes in fuel burning nozzles configured to transfer heat from the burning through the tubes.

The present disclosure refers to systems and methods for efficiently converting a C.sub.1-C.sub.3 alkane such as natural gas to a liquid C.sub.2-C.sub.10 product and hydrogen. Generally, the process comprises flowing the C.sub.1-C.sub.3 alkane through a plurality of tubes within a vessel wherein the tubes house a catalyst for converting the C.sub.1-C.sub.3 alkane to the liquid C.sub.2-C.sub.10 product and hydrogen. The C.sub.1-C.sub.3 alkane is heated under suitable conditions to produce the liquid C.sub.2-C.sub.10 product and hydrogen. Advantageously, the C.sub.1-C.sub.3 alkane is heated by burning a fuel outside the tubes in fuel burning nozzles configured to transfer heat from the burning through the tubes.