Para-xylene selective reforming/aromatization
AssigneeChevron Chemical Company
InventorRobert G. Wall
Life of this patent
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Abstract
An intermediate pore size molecular sieve supported catalyst includes a platinum group component and a gallium, zinc, indium, iron, tin or boron component. It is used for reforming and aromatization during which it produces a para-xylene enriched product. It comprises an intermediate pore size molecular sieve support, a platinum group component and a component selected from the group consisting of gallium, zinc, indium, iron, tin or boron. One form of the catalyst is first coked and is then contacted with hydrogen. The catalyst is useful in reforming and aromatizing operations.
Claims18
A method of reforming or aromatizing a C.sub.5 -C.sub.9 predominantly paraffinic or olefinic hydrocarbon feedstock to produce a reformate which is enriched in para-xylene, comprising:
- contacting the feedstock under reforming or aromatization conditions with a para-modified catalyst comprising an intermediate pore size molecular sieve support, a platinum group component and a component selected from the group consisting of gallium, zinc, indium, iron, tin and boron to produce a hydrocarbon product, the para-modified catalyst having an activity sufficient to produce a yield of at least about 30%, on a hydrogen free basis, based on a C.sub.6 -C.sub.8 non-aromatics portion of the feedstock, of benzene-toluene-xylenes-ethyl benzene (BTX) from a C.sub.5 -C.sub.9 predominantly paraffinic or olefinic hydrocarbon feedstock, the C.sub.6 -C.sub.8 non-aromatics portion comprising at least about 30% of the feedstock, at least about 15% of the BTX consisting of xylenes, with the xylenes being at least about 30% para-xylene.
Dependencies are inferred from the claim text.