Skeletal isomerization of n-butylenes to isobutylene on zeolites
AssigneeTexaco Inc.
InventorsChi-Lin O'Young, Regis J. Pellet, Alison E. Hadowanetz, John Hazen, James E. Browne
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Abstract
The conversion of normal olefins such as n-butylenes can be converted to branched olefin species such as isobutylene by skeletal isomerization over zeolite-based catalysts having pore sizes of at least about 4.5 Angstroms and a pore structure characterized by intersecting 10-MR and 8 MR channels. The zeolite-based catalysts have sufficient acidity to catalyze the skeletal isomerization of normal olefins. The catalysts can be used to produce isoolefins for reaction with alcohols in integrated processes to produce alkyl tertiary alkyl ethers such as MTBE.
Claims8
A method of converting n-butylenes to isobutylene by a skeletal isomerization reaction wherein said reaction is carried out at a temperature of between 300.degree. C. and 650.degree. C., under a pressure of between 0.1 and 100 atmospheres and a space velocity of said n-butylenes of between 0.1 and 40 Weight Hourly Space Velocity (WHSV) using a catalyst consisting essentially of a zeolite having a pore size of at least about 4.5 angstroms and the pore size structure is characterized by intersecting 10-member ring and 8-member ring channels.
Dependencies are inferred from the claim text.