Process for isomerization of normal olefin
AssigneeChevron U.S.A. Inc.
InventorsHarris E. Kluksdahl, Lawrence W. Jossens, Thomas V. Harris, Stacey I. Zones
Life of this patent
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Abstract
A process for skeletal isomerization of light normal C.sub.4-6 olefins to iso-olefins by contacting a hydrocarbon stream containing C.sub.4-6 normal olefins under isomerization conditions with a SSZ-32 zeolite catalyst.
Claims20
A process for skeletal isomerization of normal butene to iso-butene said process comprising:
- a. contacting a hydrocarbon stream containing at least 40 weight percent normal butene at a temperature of from about 700.degree. F. to about 900.degree. F., a pressure of from about 1 psig to about 150 psig, and a liquid hourly space velocity from about 0.1 to about 5 hr.sup.-1 with a catalyst comprising a zeolite having a mole ratio of silicon oxide to aluminum oxide greater than about 20:1 to less than 40:1, having a crystallite size not greater than about 0.5 microns, having at least a portion of its acid sites ion-exchanged with an alkali metal cation, and having the following X-ray diffraction lines:
- ______________________________________ d/n Int. I/I.sub.o ______________________________________ 11.05 26 10.05 10 7.83 17 4.545 71 4.277 71 3.915 100 3.726 98 ______________________________________
- thereby producing an isomerization effluent containing iso-butene;
- b. passing said isomerization effluent containing iso-butene to an etherification zone containing an alcohol and an etherification catalyst to form a reaction product comprising methyl-tert-butyl-ether;
- and
- c. recovering said methyl-tert-butyl-ether reaction product.
A process for skeletal isomerization of a C.sub.4-6 normal olefin to its corresponding methyl branched iso-olefin, said process comprising contacting a hydrocarbon stream containing at least one C.sub.4-6 normal olefin under isomerization conditions with a catalyst comprising a zeolite having a mole ratio of silicon oxide to aluminum oxide greater than about 20:1 to less than 40:1, and having the following X-ray diffraction lines:
- ______________________________________ d/n Int. I/I.sub.o ______________________________________ 11.05 26 10.05 10 7.83 17 4.545 71 4.277 71 3.915 100 3.726 98. ______________________________________
A process for skeletal isomerization of a C.sub.4-6 normal olefin to its corresponding methyl branched iso-olefin, said process comprising:
- a) contacting a hydrocarbon stream containing at least one C.sub.4-6 normal olefin under isomerization conditions with a catalyst comprising a zeolite having a mole ratio of silicon oxide to aluminum oxide greater than about 20:1 to less than 40:1, and having the following X-ray diffraction lines:
- ______________________________________ d/n Int. I/I.sub.o ______________________________________ 11.05 26 10.05 10 7.83 17 4.545 71 4.277 71 3.915 100 3.726 98 ______________________________________
- thereby producing an isomerization effluent containing a C.sub.4-6 iso-olefin;
- b) passing said isomerization effluent containing a C.sub.4-6 iso-olefin to an etherification zone containing an alcohol and an etherification catalyst to form a reaction product comprising an alkyl-tert-alkyl-ether;
- and
- c) recovering said alkyl-tert-alkyl-ether reaction product.
Dependencies are inferred from the claim text.