Conversion of Fischer-Tropsch heavy end products with platinum/boron-zeolite beta catalyst having a low alpha value
AssigneeMobil Oil Corporation
InventorsWilliam S. Borghard, Robert T. Hanlon, Suzanne E. Schramm
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Abstract
The use of high silica to alumina ratio large pore zeolites, in combination with a hydrogenation/dehydrogenation component, to convert Fischer-Tropsch heavy end products which may contain paraffins, olefins and oxygenates into low pour point distillates with high cetane number and extra high VI lube is described. The lube can be dewaxed by a conventional solvent process, by a catalytic process, or by increasing the severity of the hydroisomerization step.
Claims28
A process for upgrading a waxy heavy oil fraction produced by a Fischer-Tropsch synthesis comprising:
- contacting said feed and hydrogen gas under isomerization conversion conditions including a temperature of from about 500.degree. F. to about 700.degree. F, a pressure of about 200 psig to about 2,000 psig, and a liquid hourly space velocity (LHSV) of about 0.1 to about 2, with a catalyst comprising zeolite beta having an alpha value less than about 10 modified with a metal selected from a member of the group consisting of boron, tin, lead, or indium composited with a hydrogenation metal for a time sufficient to convert the heavy oil fraction to form a product that contains a hydrocarbon distillate fraction and a heavy hydrocarbon fraction suitable for conversion to a lubricating oil with a substantially improved viscosity index (VI).
A process for upgrading a waxy heavy oil fraction feed having a boiling point of at least 650.degree. F and which is comprised of a substantially paraffinic material comprising:
- contacting said feed and hydrogen gas under isomerization conversion conditions in the presence of hydrogen at a hydrogen partial pressure of at least 200 psig and in the presence of a low acidity zeolite isomerization catalyst having an alpha value of not more than about 10 and comprising a noble metal hydrogenation component on a porous, zeolite support material, thereby isomerizing said feed so as to form a product containing a hydrocarbon distillate fraction and a heavy hydrocarbon fraction suitable for conversion to a lubricating oil with a substantially improved viscosity index.
A process for upgrading a waxy heavy oil fraction produced by a Fischer-Tropsch synthesis comprising:
- contacting said feed and hydrogen gas under isomerization conversion conditions including a temperature of from about 500.degree.-700.degree. F, a pressure of about 200 psig to about 2,000 psig, and a liquid hourly space velocity (LHSV) of about 0.1 to about 2, with a catalyst comprising zeolite beta having an alpha value of not more than about 10 composited with a hydrogenation metal for a time sufficient to convert the heavy oil fraction to form a product that contains a hydrocarbon distillate fraction and a heavy hydrocarbon fraction suitable for conversion to a lubricating oil with a substantially improved viscosity index.
Dependencies are inferred from the claim text.