Naphtha catalytic pyrolysis catalyst for preparing ethylene propylene
A catalytic cracking and ethylene propylene technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, hydrocarbon cracking and hydrocarbon production, etc. It can solve problems such as high operating temperature, low ethylene propylene yield, and low catalyst activity.
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Embodiment 1
[0018] Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 33.3 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 24.4 grams of B Diamine, after stirring for a period of time, adjust the pH value at 11.5 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: ethylamine: H 2 O=1:0.1:0.4:40, add 2.8 grams of Y zeolite seed crystals, put the mixed solution in an autoclave, keep it at 130°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, and bake at 550°C 3 hours, made ZSM-5 / Y zeolite intergrowth molecular sieve, XRD diffraction pattern is as follows figure 1 As shown in curve 1, XRD diffraction quantification shows that the intergrown molecular sieve contains 94.5% ZSM-5 and 5.5% Y zeolite in weight percentage. Use ammonium nitrate solution with a concentration of 5%, exchange ...
Embodiment 2～4
[0020] According to the method of Example 1, the pH of the solution was controlled to be 10.5, 11 and 12 respectively, and ZSM-5 / Y zeolite intergrowth molecular sieves were synthesized respectively, which were respectively marked as FH-2, FH-3 and FH-4. The ratio of ZSM-5 and Y zeolite is shown in Table 4. Evaluation according to the method of Example 1, the results are shown in Table 5.
Embodiment 5～12
[0022] According to the method of Example 1, the different molar ratios of the solutions are controlled, and the ZSM-5 / Y zeolite intergrowth molecular sieves synthesized respectively are shown in Table 2, and the ratios of ZSM-5 and Y zeolite are shown in Table 4. Evaluation according to the method of Example 1, the results are shown in Table 5.
[0023] Table 2
[0024] Example Solution molar ratio Sample serial number Example 5 Si:Al:M:H 2 O=1:0.005:0.4:40 FH-5 Example 6 Si:Al:M:H2O=1:0.01:0.4:40 FH-6 Example 7 Si:Al:M:H 2 O=1:0.05:0.4:40 FH-7 Example 8 Si:Al:M:H 2 O=1:0.125:0.4:40 FH-8 Example 9 Si:Al:M:H 2 O=1:0.143:0.4:40 FH-9 Example 10 Si:Al:M:H 2 O=1:0.1:0.2:30 FH-10 Example 11 Si:Al:M:H 2 O=1:0.1:0.5:100 FH-11 Example 12 Si:Al:M:H 2 O=1:0.1:0.4:80 FH-12
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