Selective production of olefins
AssigneeMobil Oil Corporation
InventorLouis D. Rollmann
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Abstract
A lower alcohol and/or ether feed is selectively converted to a mixture of light olefins, including ethylene and propylene, by catalytic contact of the feed material with a catalyst comprising one or more zeolites characterized by a silica to alumina mole ratio of at least 12 and a constraint index in the approximate range of 1 to 12. The catalytic conversion is carried out in the presence of bulky heterocyclic organic nitrogen compounds to suppress the formation of mononuclear aromatics. The process of this invention is particularly useful in the production of C.sub.2 -C.sub.3 olefins from methanol or dimethyl ether.
Claims21
In a process for converting lower alcohols and/or ethers to lower olefins under conversion conditions in the presence of a catalyst comprising one or more zeolites having a silica to alumina mole ratio of at least 12 and a constrain index of 1 to 12, the improvement comprising contacting said catalyst with one or more bulky heterocyclic organic nitrogen compounds having an effective critical dimension of greater than 6.2 Angstroms and having a pKa of between about 3 and 9.
Dependencies are inferred from the claim text.