Interior surface modifications of molecular sieves with organometallic reagents and the use thereof for the conversion of oxygenates to olefins
AssigneeExxonMobil Chemical Patents Inc.
InventorsKun Wang, Guang Cao, Michael Joseph Brennan, Karl G. Strohmaier, Richard B. Hall
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Abstract
A method for the post synthesis modification of molecular sieves with organometallic reagents. The method may be used for large pore molecular sieves and small pore molecular sieves, such as SAPO-34. SAPO-34 is a useful catalyst for the conversion of oxygenates, such as methanol, to olefins. Post synthesis organometallic modification improves catalyst performance and increases light olefin selectivity in the conversion of methanol to olefins.
Claims29
A method of making an olefin product comprising contacting a feedstock comprising at least one organic compound that contains at least one oxygen atom (oxygenate) in the presence of a catalyst comprising a calcined, organometallic treated molecular sieve under conditions suitable to convert the oxygenate into olefins;
- wherein said calcined, organometallic treated molecular sieve is prepared by a process comprising:
- a) providing a molecular sieve having at least one hydroxyl group;
- b) contacting said molecular sieve with a solution comprising an organometallic compound and a non-proton donating solvent, wherein said organometallic compound comprises at least one metal bound to at least one alkyl group;
- and,
- c) separating the organometallic treated molecular sieve from said solution.
Dependencies are inferred from the claim text.