Double bond isomerization of 1-olefin containing feeds using ZSM-22, ZSM-23 or ZSM-35
AssigneeMobil Oil Corporation
InventorsWerner O. Haag, Jose G. Santiesteban
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Abstract
A method for isomerizing a 1-olefin-containing organic feedstock having an average carbon number of about 4 to 5, e.g., 1-butene, to convert 1-olefin to 2-olefin at temperatures less than 200.degree. C., with a double bond isomerization catalyst comprising a zeolite sorbing 30 to 55 mg n-hexane at 90.degree. C., 83 torr, and 15 to 40 mg 3-methylpentane at 90.degree. C., 90 torr, per g dry zeolite in the hydrogen form, e.g., ZSM-22, ZSM-23, or ZSM-35. Catalyst aging is minimal despite operation at low temperatures and high pressures.
Claims21
A method for isomerizing a 1-olefin-containing organic feedstock to provide a 2-olefin rich product which comprises contacting said feedstock under double bond isomerization conditions which include temperatures less than 200.degree. C., with a double bond isomerization catalyst comprising a zeolite;
- said method being characterized by reduced catalyst aging by selecting as said zeolite one sorbing 30 to 55 mg n-hexane at 90.degree. C., 83 torr, and 15 to 40 mg 3-methylpentane at 90 C, 90 torr, per g dry zeolite in the hydrogen form;
- and selecting as said feedstock one having an average carbon number of about 4 to 5.
A method for isomerizing a 1-olefin-containing organic feedstock to convert a substantial portion of said 1-olefin to 2-olefin which comprises contacting said feedstock under double bond isomerization conditions, at temperatures less than 200.degree. C., with a double bond isomerization catalyst comprising a zeolite;
- said method being characterized by reduced catalyst aging by selecting as said zeolite one having a Pore Size Index of 20 to 26, and selecting as said feedstock one having an average carbon number of about 4 to 5.
Dependencies are inferred from the claim text.