Catalyst for catalytic cracking of heavy oil
A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve difficult problems and achieve the effects of low benzene content, high diesel yield and improved stability
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Embodiment 1
[0047] Nanorods that have been ion-exchanged are plugged with ZSM-11-based hierarchical porous molecular sieve materials (SiO 2 / Al 2 o 3 =35, grain size 6-8μm) impregnated and dried by phosphotungstic acid and ammonium dihydrogen phosphate solution respectively, and the obtained samples were roasted at 550°C for 2 hours to obtain modified molecular sieves, which contained phosphorus elements 1wt%, Tungsten element 3wt%. Add 47.06kg of pseudo-boehmite into the stirred tank, inject 250kg of deionized water, add hydrochloric acid under continuous mechanical stirring to form a colloid, and keep the pH at 3-5. Add 20kg of the modified ZSM-11-based hierarchical porous molecular sieve material and 43kg of kaolin to the kettle in turn, and after stirring evenly, add 12.5kg of silica sol and 2kg of 85% phosphoric acid. The catalyst was prepared by spray granulation after mechanical stirring for 2 hours. The physical parameters of the catalyst are shown in Table 1.
[0048] The pr...
Embodiment 2
[0051] The modification method of molecular sieve is the same as embodiment 1. Add 17.65kg of pseudo-boehmite into the stirred tank, inject 250kg of deionized water, add hydrochloric acid under continuous mechanical stirring to form a colloid, and keep the pH at 3-5. Add 70kg of hydrogen-type HZSM-11 molecular sieve material (SiO 2 / Al 2 o 3 =200, grain size 1-2μm) and 18kg kaolin, after stirring evenly, add 25kg silica sol and 2kg85% phosphoric acid. The catalyst was prepared by spray granulation after mechanical stirring for 2 hours. The physical parameters of the catalysts are listed in Table 1.
[0052] The aging conditions of the catalyst are the same as in Example 1.
[0053] The evaluation conditions of the catalyst are the same as in Example 1. The reaction results are shown in Table 3.
Embodiment 3
[0055] The eutectic molecular sieve (SiO 2 / Al 2 o 3 =50, grain size 4-6μm) were impregnated and dried in ammonium tungstate and phosphoric acid solutions respectively, and the obtained samples were roasted at 550°C for 2 hours to obtain a modified molecular sieve, which contained 3wt% phosphorus and 5wt tungsten %. Add 39.71kg of pseudo-boehmite into the stirred tank, inject 250kg of deionized water, add hydrochloric acid under continuous mechanical stirring to form a colloid, and keep the pH at 3-5. Add 35kg of the modified ZSM-11-based hierarchical porous molecular sieve material and 33kg of kaolin to the kettle in sequence, and after stirring evenly, add 12.5kg of silica sol and 2kg of 85% phosphoric acid. The catalyst was prepared by spray granulation after mechanical stirring for 2 hours. The physical parameters of the catalyst are shown in Table 1.
[0056] The aging conditions of the catalyst are the same as in Example 1.
[0057] The evaluation conditions of the...
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