| US 7,501,547 B2 | ||
| Alkylaromatics production | ||
| Michael C. Clark, Pasadena, Tex. (US); and Brian Maerz, Chelmsford, Mass. (US) | ||
| Assigned to ExxonMobil Chemical Patents Inc., Houston, Tex. (US); and Badger Licensing, LLC, Cambridge, Mass. (US) | ||
| Filed on May 10, 2006, as Appl. No. 11/431,677. | ||
| Prior Publication US 2007/0265481 A1, Nov. 15, 2007 | ||
| Int. Cl. C07C 2/68 (2006.01) | ||
| U.S. Cl. 585—449 [585/467] | 24 Claims |
| 1. A process for producing an alkylaromatic compound in a multistage reaction system comprising at least first and second
series-connected alkylation reaction zones each containing an alkylation catalyst, the process comprising the steps of:
(a) introducing a first feed comprising an alkylatable aromatic compound and a second feed comprising an alkene and one or
more alkanes into said first alkylation reaction zone;
(b) operating said first alkylation reaction zone under conditions effective to cause alkylation of said alkylatable aromatic
compound by said alkene, said conditions being such that part of said alkylatable aromatic compound is in the vapor phase
and part is in the liquid phase;
(c) withdrawing from said first alkylation reaction zone an effluent comprising said alkylaromatic compound, unreacted alkylatable
aromatic compound, any unreacted alkene and said alkane; and
(d) without removing said alkane from said effluent, supplying said effluent and said alkene to the second alkylation reaction
zone; and
(e) operating said second alkylation reaction zone under conditions effective to cause alkylation of said alkylatable aromatic
compound by said alkene, said conditions being such that part of said alkylatable aromatic compound is in the vapor phase
and part is in the liquid phase;
wherein the operating conditions in (b) and (e) are such that the ratio of the volume of liquid to the volume of vapor in
each of said first and second reaction zones is from about 0.5 to about 10, and wherein said alkylation catalysts in each
of said first and second alkylation reaction zones comprise at least one of MCM-22, MCM-36, MCM-49 and MCM-56.
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