Catalyst and process for making said catalyst
AssigneeMobil Oil Corporation
InventorsDavid H. Olson, Paul G. Rodewald
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Abstract
Disclosed is a zeolite base catalyst useful particularly for the selective production of para-dialkylsubstituted benzene. The catalyst comprises a porous crystalline zeolite having silica deposited thereon and having incorporated therein phosphorous. Described also in the process for making the catalyst and the parameters for the use of the catalyst in dialkylation processes.
Claims25
A catalyst composition comprising a porous crystalline zeolite, having silica deposited thereon as a result of contact with a silicone compound of a molecular size incapable of entering the pores of the zeolite and subsequent heating in an oxygen-containing atmosphere to a temperature in excess of 300.degree. C. but below a temperature at which crystallinity of the zeolite is adversely affected at a rate such that the silicone compound does not volatilize prior to undergoing oxidation to silica, said zeolite being characterized by an activity, in terms of alpha value, of between about 2 and about 5000, a xylene sorption capacity greater than 1 gram/100 grams of zeolite and an ortho xylene sorption time for 30 percent of said capacity greater than 10 minutes, said sorption capacity and sorption time being measured at 120.degree. C. and a pressure of 4.5.+-.0.8 mm. of mercury and modified by the addition thereto of phosphorus.
Dependencies are inferred from the claim text.