Patent ID: 7199070

Claim:
A conversion catalyst for ethylbenzene containing xylenes which includes MFI-type zeolite at 15 to 80 weight parts and alumina at 20 to 85 weight parts, wherein Xray diffraction intensity ratio of the crystal lattice plane spacing d-value of 0.196±0.002 nm assigned to alumina to the crystal lattice plane spacing d-value of 0.386±0.008 nm assigned to MFI-type zeolite is in a range from 7:100 to 35:100, wherein a silica/alumina mole ratio of the MFI-type zeolite is less than or equal to 45, and wherein the catalyst contains rhenium, silver and at least any one of alkaline-earth metals selected from calcium, strontium or barium at 0.005 to 1.5 weight %, 0 to 5 weight % and 0.05 to 5 weight %, respectively, in relation to the catalyst.