Chemical process and catalyst
AssigneeThe British Petroleum Company p.l.c.
InventorsSami A. I. Barri, Rabaab Tahir
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Abstract
A catalyst which comprises zinc, together with an effective amount of a platinum group metal on a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms or of silicon, zinc and oxygen atoms. There is also provided a process for the dehydrogenation of a C.sub.2 to C.sub.10 paraffin to yield an alkene product which process comprises contacting the paraffin under dehydrogenation conditions with a catalyst according to the invention.
Claims19
A catalyst which comprises zinc, together with an effective amount of a platinum group metal on a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms or silicon, zinc and oxygen atoms;
- provided that if the framework of said material consists essentially of silicon and oxygen atoms, said platinum group metal is other than palladium;
- and provided that if the framework of said material consists essentially of silicon, zinc and oxygen atoms, said platinum group metal is other than platinum.
A process for the preparation of a catalyst which comprises zinc, together with an effective amount of a platinum group metal on a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms or of silicon, zinc and oxygen atoms, which comprises either:
- (a) impregnating a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms, with a soluble thermally decomposable compound of zinc and with a soluble thermally decomposable compound of a platinum group metal other than palladium;
- or impregnating a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon, zinc and oxygen atoms, with a soluble thermally decomposable compound of a platinum group metal other than platinum and optionally with a soluble thermally decomposable compound of zinc;
- or (b) forming a hydrogel comprising water, a soluble source of zinc, a source of silica and an organic nitrogen-containing compound and thereafter crystallising the hydrogel at elevated temperature;
- the process also comprising incorporating a source of a platinum group metal other than platinum before or after crystallisation of the hydrogel.
A process for the preparation of a catalyst which comprises zinc, together with an effective amount of a platinum group metal on a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms or of silicon, zinc and oxygen atoms, which comprises impregnating a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms, with a soluble thermally decomposable compound of zinc and with a soluble thermally decomposable compound of a platinum group metal other than palladium;
- or impregnating a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon, zinc and oxygen atoms, with a soluble thermally decomposable compound of a platinum group metal other than platinum and optionally with a soluble thermally decomposable compound of zinc.
Dependencies are inferred from the claim text.