Heavy aromatic hydrocarbon light catalyst, preparation method and application thereof

Abstract

The invention relates to a heavy aromatic hydrocarbon light catalyst, a preparation method and application thereof. In a composite carrier, H type MCM-56 zeolite is between 50 and 80 wt percent, Al2O3 is between 20 and 50 wt percent, metals or oxides thereof of tin, bismuth, lanthanum, molybdenum, nickel, chrome and cobalt are 3 to 20 wt percent, or platinum, palladium, rhenium or oxide thereof are 0.1 to 2wt percent. The catalyst is applicable to the light preparation of benzene, methylbenzene and dimethylbenzene by heavy aromatic hydrocarbon; and the catalyst has good catalytic effect on a hydrodealkylation light reaction of C9 heavy aromatic hydrocarbon, the transformation ratio of C9 aromatic hydrocarbon is 76.89 wt percent, the yield of BTX is 48.37 wt percent, the selectivity of the BTX is 80.50 mol percent, no phenylethane is generated in a product, and the dimethylbenzene has high content.

Description

technical field

[0001] The present invention relates to a kind of aluminosilicate zeolite and IVA group, VA group, IIIB group, VIB group, VIIB group or VIII group metal component suitable for the C 9 + A catalyst for lightening heavy aromatics to produce benzene, toluene and xylene (BTX), a preparation method and application thereof. Background technique

[0002] Heavy aromatics generally refer to C by-products in petroleum and coal processing 9 The main sources of the above aromatics are catalytic reforming units of oil refineries, wide-fraction catalytic reforming units of polyester raw material plants, by-products of pyrolysis gasoline and ethylene tar in ethylene units, and coal tar by-products of coal high-temperature coking, expressed as C 9 and C 10 mainly aromatics. C 9 + The reformed aromatics contain about 40% of trimethylene, 30% of methyl-ethylbenzene, mesitylene and mesitylene, and these components are very valuable organic chemical raw materials. At pres...