Shape selective hydrocarbon conversions over modified catalyst
AssigneeMobil Oil Corporation
InventorsRudolph M. Lago, David O. Marler, Sharon B. McCullen
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Abstract
A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedsteam under conversion conditions with a modified catalytic molecular sieve which has been modified by being pre-selectivated with a first silicon source, then steamed. The feedstream may also contain a second silicon source which is a high efficiency para-xylene selectivating agent. The method for modifying the molecular sieve is also described.
Claims24
A process for a shape selective hydrocarbon conversion comprises contacting a reaction stream comprising hydrocarbon to be converted, under conversion conditions, with a catalytic molecular sieve comprising ZSM-5 which has been modified by being (i) pre-selectivated with a first silicon-containing compound selected from the group consisting of silicones and propylamine silane polymers and (ii) subsequently steamed at about 280.degree. C. to 400.degree. C.
A process for toluene disproportionation comprising:
- contacting a reaction stream which comprises toluene, under conversion conditions, with a modified catalytic molecular sieve comprising ZSM-5 wherein the catalytic molecular sieve has been modified by being (i) pre-selectivated with a first silicon source selected from the group consisting of silicones and propylamine silane polymers and (ii) subsequently steamed at about 280.degree. C. to 400.degree..
Dependencies are inferred from the claim text.