Composite copper/tin/alkali metal catalysts for the direct...

Details Composite copper/tin/alkali metal catalysts for the direct... Composite copper/tin/alkali metal catalysts for the direct...

2007-07-03

2007-07-03

Lorengo, J. A. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

C502S344000, C502S345000, C502S352000, C556S472000, C556S473000, C556S477000

Reexamination Certificate

active

11148323

ABSTRACT:
The alkylhalosilanes are directly synthesized while diminishing the formation of coke by reacting an alkyl halide with silicon in the presence of a catalytically effective amount of (α) a copper metal or a copper-based compound catalyst and (β) a catalyst promoter intermixture therefor which comprises an effective minor amount of an additive β1 selected from the group consisting of tin, a tin-based compound and mixture thereof, optionally, an effective minor amount of an additive β2 selected from the group consisting of zinc metal, a zinc-based compound and mixture thereof, an effective minor amount of an additive β3 selected from the group consisting of cesium, potassium and rubidium, and compound and mixture thereof, and, optionally, an effective minor amount of an additive β4 selected from the group consisting of the element phosphorus, a phosphorus-based compound and mixture thereof.

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patent: 4962220 (1990-10-01), Halm et al.
patent: 4966986 (1990-10-01), Halm et al.
patent: 5312948 (1994-05-01), Freeburne et al.
patent: 5596119 (1997-01-01), Halm et al.

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