Process for producing gasolines and jet fuel from n-butane
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United States of America Patent
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Mar 12, 1996
Grant Date -
N/A
app pub date -
Apr 8, 1994
filing date -
Apr 8, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Polymeric fuels are produced from saturated C.sub.4 hydrocarbons by a process comprising: (A) dehydroisomerizing a gas mixture comprising predominantly of n-butane and hydrogen in a catalytic reactor containing a catalyst (a) of platinum supported on alumina, whose surface is coated with silica, and, optionally, a solid acidic catalyst (b) selected from the group consisting of alumina, whose surface is coated with silica, and Boralite B, with an effluent being obtained which comprises a mixture of predominantly of unreacted n-butane, butenes and isobutene, all of which components of the mixture have a carbon atom content less than 5; (B) separating the mixture of olefins and parafins from hydrogen and aromatic byproducts; and (C) oligomerizing said mixture in the presence of a catalyst consisting of amorphous silica-alumina gel, as determined by X-rays, having a silica:alumina molar ratio within the range of 30:1 to 500:1, with a surface area of from 500 to 1000 m.sup.2 /g, and a pore diameter substantially within the range of from 1 to 3 nm, thereby producing a gasoline material boiling within the range of 80.degree. to 175.degree. C., a jet fuel boiling within the range of 175.degree.-300.degree. C. and a gas oil boiling at temperatures greater than 300.degree. C.
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