Diesel oil hydro-upgrading catalyst and preparation method thereof
A technology for hydrogenation and upgrading and catalyst, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of small increase of diesel cetane number, low yield of diesel products, high density, etc. problems, to achieve the effect of improving cetane number, suitable acidity and acid distribution, and improving pore structure
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[0041] Example 1
[0042] The modified β molecular sieve of the present invention is synthesized by using tetraethylammonium hydroxide as a template and adopting a hydrothermal crystallization method. Take 10000mL of the raw powder slurry of industrial synthetic β molecular sieve, which contains about 2000g of solid phase β molecular sieve, and its chemical silicon aluminum SiO 2 / Al 2 O 3 The (molar ratio) ratio is 27.49, the specific surface area is 101m2 / g, the pore volume is 0.19cm3 / g, and the sodium oxide content is 3.67wt%. Add an appropriate amount of purified water to the slurry, and add a certain amount of ammonium nitrate, so that the liquid-solid ratio (weight) is 10:1, the concentration of ammonium nitrate is 2mol / L, stir, heat up to 95-100°C, stir at constant temperature After filtering for 2 hours, the filter cake is subjected to ammonium exchange for the second time. The exchange conditions are the same as the first time. Finally, the β molecular sieve is washed un...
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[0043] Example 2
[0044] Taking 200g of B-1 as a raw material, the B-1 was subjected to hydrothermal treatment at a water vapor pressure of 0.15 MPa, a treatment temperature of 550°C, and a treatment time of 2 hours. The molecular sieve obtained is B-2, and the properties are shown in Table 1.
[0045] Taking 200g of B-1 as a raw material, B-1 was subjected to hydrothermal treatment at a water vapor pressure of 0.15 MPa, a treatment temperature of 650°C, and a treatment time of 2 hours. The molecular sieve obtained is B-3, and the properties are shown in Table 1.
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[0046] Example 3
[0047] Weigh 60g of B-2 molecular sieve into a sealed flask with a reflux device, add 1000mL of 0.8mol / L aluminum sulfate aqueous solution, stir at 95℃ for 1.0 hour, filter, and wash with hot deionized water. For the cake, stop washing after the pH of the washing liquid is close to 7. The filter cake was dried in an oven at 120°C for 5 hours to obtain the β-type molecular sieve of the present invention, which was numbered B-4. The properties of the molecular sieve are shown in Table 1.
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