Heavy aromatic hydrocarbon lightening catalyst based on VIII group metal elements, preparation method and application thereof
A technology for lightening heavy aromatics and metal elements, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems affecting BTX yield and catalyst service life, and achieve pore volume and specific surface area Increase, excellent strength and hardness, effect of increasing strength
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[0048]Preferably, the preparation method of the carrier includes: uniformly mixing aluminum hydroxide dry rubber powder and modified fullerene at room temperature.
[0049]Preferably, the amount of the modified fullerene used is 0.1-1.0 wt% of the total mass of the carrier, especially 0.4-1.0 wt%.
[0050]The fullerene in the carrier is modified by dissolving carbon disulfide before being mixed with alumina. The dissolution temperature for dissolving and modifying carbon disulfide is 20-40°C, the pressure is 0.10-0.25MPa, and the dissolution time is 3- 10min; the mass ratio of carbon disulfide to fullerene used in the dissolution modification of carbon disulfide is 100-200:1.
[0051]Further, the fullerene adopts powder C60 fullerene with a purity of ≥99.5 wt%.
[0052]In some embodiments, in the catalyst of the present invention, the pore volume of the aluminum hydroxide dry rubber powder is 0.7-1.1 ml / g, and the specific surface area is 250-500 m2 / g, and the aluminum hydroxide dry rubber powd...
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[0098]Example 1
[0099]1.5 g of fullerene C60 powder with a purity of 99.5% was dissolved and modified with 150 g of carbon disulfide at a pressure of 0.10 MPa and 40° C. for 4 minutes to obtain a purple modified fullerene solution. Mix this modified fullerene with 250g of aluminum hydroxide dry rubber powder, and then use the prepared palladium osmium impregnation solution above, with a concentration of 44.0g metal (as oxide, palladium / osmium ratio 1:10) / 100mL The total solution is 100ml, the immersion temperature is 24℃, and the modified fullerene-mixed aluminum hydroxide dry rubber powder is immersed. The immersion time is 2.0 hours, and it is dried at 90℃ for 6 hours and crushed into 180 meshes to obtain the metal-containing group. A mixture of modified fullerene aluminum hydroxide dry rubber powder.
[0100]Take the above-mentioned modified fullerene aluminum hydroxide dry rubber powder mixture containing metal components, 85 g of Y-1 molecular sieve (85% on a dry basis) and 55 gram...
Example Embodiment
[0101]Example 2
[0102]1.60 g of fullerene C60 powder with a purity of 99.9% was dissolved and modified with 160 g of carbon disulfide at a pressure of 0.15 MPa and 30° C. for 6 minutes to obtain a purple modified fullerene solution. Mix the modified fullerene with 240g aluminum hydroxide dry rubber powder, and use the prepared palladium nickel impregnation solution with a concentration of 35.0g metal (as oxide, palladium / nickel ratio 1:10) / 100mL solution 100mL , The dipping temperature is 22 ℃, and the modified fullerene-mixed aluminum hydroxide dry rubber powder is dipped, the dipping time is 8 hours, and it is dried at 100 ℃ for 5 hours, and crushed into 180 meshes to obtain the modified metal-containing component Sex fullerene aluminum hydroxide dry rubber powder mixture.
[0103]Take the above-mentioned modified fullerene aluminum hydroxide dry rubber powder mixture containing metal components, 65 g of Y-2 molecular sieve (85% on a dry basis) and 60.0 grams of binder (30% by weight ...
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