| US 7,576,251 B2 | ||
| Process for the double bond hydroisomerization of butenes | ||
| Robert J. Gartside, Summit, N.J. (US); Thomas P. Skourlis, Basking Ridge, N.J. (US); and Hassan Kaleem, Franklin Park, N.J. (US) | ||
| Assigned to ABB Lummus Global Inc., Bloomfield, N.J. (US) | ||
| Filed on Apr. 15, 2005, as Appl. No. 11/107,649. | ||
| Prior Publication US 2006/0235253 A1, Oct. 19, 2006 | ||
| Int. Cl. C07C 5/25 (2006.01); C07C 5/27 (2006.01) | ||
| U.S. Cl. 585—670 [585/664; 585/646; 585/647; 585/324] | 21 Claims |
| 1. A process for the preferential conversion to 2-butene of a C4 stream containing 1-butene and 2-butene, comprising:
mixing said C4 stream with a first hydrogen stream to form a feed stream,
hydroisomerizing said feed stream in the presence of a hydroisomerization catalyst in order to convert at least a portion
of said 1-butene to 2-butene, thereby producing a hydroisomerization effluent,
passing said hydroisomerization effluent through a fractionation column to form a top stream comprising isobutane and isobutylene
and a bottoms stream comprising 2-butene,
withdrawing a recycle stream from said fractionation column at a location above the feed point at which the weight ratio of
1-butene to 2-butene is high, and
combining said recycle stream with at least one of said C4 stream and said feed stream upstream from said hydroisomerization
catalyst.
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