Ethylbenzene production process with ex situ selectivated zeolite catalyst
AssigneeMobil Oil Corporation
InventorsJeevan S. Abichandani, Jeffrey S. Beck, Sharon B. McCullen, David H. Olson
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Abstract
A process for ethylbenzene production that involves contacting a hydrocarbon feedstream including benzene and ethylene, under alkylation conditions, with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two selectivation sequences, each selectivation sequence comprising contacting the catalyst with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.
Claims21
A process for improved shape selective alkylation of benzene comprising:
- contacting a reaction stream comprising ethylene and benzene, under alkylation conditions sufficient to produce ethylbenzene, with a catalytic molecular sieve which comprises a zeolite having a constraint index of from about 1 to about 12 and which has been modified by being exposed to at least two ex-situ selectivation sequences;
- wherein each ex-situ selectivation sequence includes the steps of contacting the catalytic molecular sieve with a selectivating agent dissolved in an organic carrier and subsequently calcining the catalytic molecular sieve.
Dependencies are inferred from the claim text.