No abstract

The commercial clay modified with zeolite and La 2 O 3 was characterized by thermoprogrammed desorption (t.p.d.) of NH 3 and pyridine adsorption followed by Fourier transform infrared spectroscopy (FTIR). The result showed that the weak Lewis acid plays an important role in the alkylation reaction between olefin and aromatics which obeyed the carbonium ion mechanism. The industrial test was conducted in the 450kt/a industrial PX device at Sinopec Zhenhai Company for removing trace olefins from aromatics. It has been proved that the life cycle of the catalyst was 5.3 times that of the commercial clay. The kinetics formula for deactivation rates was explored and the result showed that the rate of clay was much higher than the catalyst deactivation rate.