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US 5,514,632 AGranted
Use of an alumina containing bed for silicon species capture in the manufacture of silicone treated catalysts
AssigneeMobil Oil Corporation
InventorsArthur W. Chester, Jocelyn A. Kowalski
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Abstract
Silicon-containing species which evolve from the calcination of silicone treated catalysts may be removed by the use of an alumina-containing guard bed. The method is particularly useful for the production of silicone treated ZSM-5 catalysts.
Claims14
A method for the manufacture of a silica coated catalyst comprising the steps of:
- (a) contacting a catalytic molecular sieve with a silicone compound and drying to form a silicone treated catalyst;
- (b) calcining the silicone treated catalyst in an inert atmosphere, followed by calcining in an oxygen-containing atmosphere, and discharging an effluent stream comprising volatile silicon-containing species;
- (c) passing all effluent from step (b) through a bed comprising alumina to remove and convert the volatile silicon-containing species to silica;
- (d) recovering a significantly reduced silicon containing gas stream from step (c).
1 more element
Dependencies are inferred from the claim text.