Catalyst for preparing propylene from butane and ethylene and preparation method thereof

[0027] MCM-48 was prepared by a conventional method, and the average pore diameter of MCM-48 was 2.8 nanometers. Take 600 grams of MCM-48 with 200 grams of SiO 2 Mix to prepare a mixed carrier C with a certain particle size.

[0028] Mix 800 grams of carrier C and 1% scallop powder and put them into the mixer evenly, after stirring for 45 minutes, add the required 5% silica sol and 24 grams of ammonium metatungstate, then add 800 grams of deionized water, knead, After extrusion and drying, it was calcined at 550°C for 4 hours to obtain a disproportionation catalyst, which was designated as ACR-1. The evaluation of the catalyst was carried out on an olefin disproportionation evaluation device. Calculated by mass fraction, the main components of the raw material include: 5.37% butene-1, 57.27% butene-2 ​​and the balance of n-butane. The reaction is at a temperature of 300°C, a pressure of 3MPa, and a molar ratio of ethylene to butene of 3 and 4.8 hours -1 The evaluation was c...

[0030] The SBA-15 is prepared by a conventional method, and the average pore diameter of the SBA-15 is 9.5 nanometers. Take 800 grams of SBA-15 and 50 grams of SiO 2 Mix to prepare a mixed carrier C with a certain particle size.

[0031] Mix 850 grams of carrier C and 1% scallop powder and put them into the mixer evenly. After stirring for 45 minutes, add the required 5% silica sol and 180 grams of ammonium metatungstate, then add 850 grams of deionized water, knead, After extrusion and drying, it was calcined at 450°C for 8 hours to obtain a disproportionation catalyst, which was designated as ACR-2. The evaluation conditions are the same as in Example 1, and the evaluation results are shown in Table 2.

[0033] The MSU-x was prepared by a conventional method, and the average pore diameter of the MSU-x was 3.7 nanometers. Take 100 grams of MSU-x with 650 grams of SiO 2 Mix to prepare a mixed carrier C with a certain particle size.

[0034] Mix 750 grams of carrier C and 1% scallop powder and put them into the mixer evenly, after stirring for 45 minutes, add the required 5% silica sol and 60 grams of ammonium metatungstate, then add 750 grams of deionized water, knead, The catalyst precursor M was prepared by extruding, drying and calcining at 650° C. for 2 hours. Put 200 grams of magnesium oxide into a blender and stir, and add the required amount of 1% scallop powder, 5% silica sol and 40 grams of deionized water, stir for 30 minutes, knead, extrude, dry and roast at 550°C Catalyst precursor Y was produced in 6 hours. Mix M and Y evenly and record it as ACR-3. The evaluation conditions are the same as in Example 1, and the evaluation results are shown in Table 2.