METHOD FOR TRANSALKYLATION OF BENZENE WITH POLYALKYL BENZENES Russian patent published in 2013 - IPC C07C15/73 C07C15/85 C07C6/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for transalkylation of benzene with polyalkyl benzenes on a zeolite-containing catalyst to obtain ethylbenzene or isopropylbenzene. The method is characterised by that the polyalkyl benzenes used are diethyl benzenes or diisopropyl benzenes; the process is carried out in a section reactor. The main benzene stream is fed into the first section of the reactor with the ratio of benzene to diethyl benzene in the first section of the reactor equal to 9:1 or 10.5:1, or 15:1 or 16.5:1 or 18:1 or the ratio of benzene to diisopropyl benzene in the first section of the reactor equal to 7.2:1 or 9.6:1. Polyalkyl benzenes are fed into each section of the reactor having a zeolite catalyst bed, and an amount of benzene, which is such that the total weight ratio of benzene to polyalkyl benzene in the reactor is equal to 1:1-6:1, is fed into each section of the reactor having a zeolite catalyst bed, except the first section.

EFFECT: use of the present invention prolongs catalyst life, increases conversion of polyalkyl benzene and selectivity with respect to the end product.

4 cl, 14 ex, 2 tbl, 6 dwg