| US 7,550,644 B2 | ||
| Isobutane alkylation | ||
| William C. Pfefferle, Madison, Conn. (US) | ||
| Assigned to Precision Combustion, Inc., North Haven, Conn. (US) | ||
| Filed on May 10, 2005, as Appl. No. 11/126,859. | ||
| Application 11/126859 is a continuation in part of application No. 11/115512, filed on Apr. 27, 2005. | ||
| Claims priority of provisional application 60/569599, filed on May 10, 2004. | ||
| Prior Publication US 2005/0250972 A1, Nov. 10, 2005 | ||
| Int. Cl. C07C 2/54 (2006.01); C07C 2/58 (2006.01) | ||
| U.S. Cl. 585—720 [585/722; 585/714; 585/716] | 5 Claims |
| 1. A method of operating a fixed-bed alkylation reactor with reduced polymerization of olefin comprising:
a) obtaining a feed stream containing isobutane;
b) passing the feed stream into a flow channel wherein the flow channel defines a flow channel entrance region having no active
alkylation catalyst positioned thereon, and a flow channel downstream region, the flow channel downstream region further defining
a flow channel inner surface with an alkylation catalyst positioned on at least a portion of the flow channel inner surface
thereby defining a transition point between the flow channel entrance region and the flow channel downstream region;
c) injecting an olefin into said feed stream at a point beyond the transition point into the flow channel downstream region,
whereby the olefin contacts the alkylation catalyst by diffusion to the flow channel inner surface thereby reacting isobutane
with the olefin; and
d) producing an alkylate product, wherein the reactor comprises a structural configuration monolith.
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