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US 11,376,574 B2Granted
Catalyst for converting alkylaromatic hydrocarbon and preparation method thereof
AssigneeSK Innovation Co., Ltd.
InventorsSang Il Lee, Ji Hoon Lee, Young Eun Cheon
Life of this patent
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Abstract
Disclosed are a bifunctional catalyst and a preparation method therefor, the bifunctional catalyst being suitable to produce high-value aromatic hydrocarbons by subjecting alkylaromatic hydrocarbons to a disproportionation/transalkylation/dealkylation reaction while suppressing aromatic loss or subjecting C8 aromatic hydrocarbons to an isomerization reaction while suppressing xylene loss.
Claims11
A method for producing C8 aromatics, the method comprising:
- providing a feedstock containing benzene, toluene, and/or C9+ aromatics;
- and
- forming a reaction product containing an increased amount of C8 aromatic hydrocarbons from the feedstock by at least one of disproportionation, transalkylation, and dealkylation reactions in the presence of a catalyst,
- wherein the catalyst comprises:
- (A) a mixed support comprising:
- (i) a first zeolite, which has a silica-alumina ratio (SAR) of 5 to 300 and a 10-membered ring pore structure, and/or a second zeolite, which has a silica-alumina ratio (SAR) of 5 to 300 and a 12-membered ring pore structure with a pore diameter of 6 to 9 Å;
- and (ii) a refractory inorganic oxide binder;
- and
- (B) a first metal supported only on the refractory inorganic oxide binder in the mixed support and having hydrogenation activity,
- wherein the first metal is at least one selected from the group consisting of platinum (Pt), tungsten (W), rhenium (Re), ruthenium (Ru), iridium (Jr), nickel (Ni), palladium (Pd), and molybdenum (Mo), wherein the amount of the first metal supported is in a range of 0.01 to 5 wt % on the basis of the weight of the mixed support, and
- wherein the aromatic loss in the reaction product is 1 mol % or less.
8 more elements
Dependencies are inferred from the claim text.