In-situ preparation method of a catalyst for co-producing p-xylene and light olefins from benzene and methanol to toluene
A technology of p-xylene and low-carbon olefins, applied in the field of chemical engineering, can solve the problems of huge investment, complex catalyst preparation process, and unmentioned content content, etc., to simplify the process, save preparation and transfer steps, and overcome technical prejudice Effect
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Embodiment 1
[0074] Example 1 Preparation of HZSM-5 shaped molecular sieve sample for fixed bed
[0075] 100g HZSM-5 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=30) was calcined in air atmosphere at 550°C for 4 hours, then pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-5-A.
[0076] 100g HZSM-5 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=5) was calcined in an air atmosphere at 550°C for 4 hours, then pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-5-B.
[0077]100g HZSM-5 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=10) was calcined in air atmosphere at 550°C for 4 hours, then pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-5-C.
Embodiment 2
[0078] Example 2 Preparation of HZSM-11 shaped molecular sieve sample for fixed bed
[0079] 100g HZSM-11 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=35) was calcined in air atmosphere at 550°C for 4 hours, pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-11-A.
[0080] 100g HZSM-11 zeolite molecular sieve raw powder (Nankai University Catalyst Factory, Si / Al=12) was calcined in air atmosphere at 550°C for 4 hours, pressed into tablets, crushed, and sieved to obtain 40-60 mesh particles. Molecular sieve particles, denoted as FXHZSM-11-B.
[0081] Example 3 Preparation of HZSM-5 shaped molecular sieve sample for fluidized bed
[0082] 100g of HZSM-5 zeolite molecular sieve former powder (Nankai University Catalyst Factory, Si / Al=30) is mixed with aluminum or silicon-containing amorphous binder and spray-dried to form. The specific steps are:
[0083] Mix the original powde...
Embodiment 4
[0086] Example 4 Preparation of HZSM-5 shaped molecular sieve sample for fluidized bed
[0087] The specific preparation conditions and steps are the same as those in Example 3, except that the raw material HZSM-5 zeolite molecular sieve raw powder is used in an amount of 10 kg, and the particle size distribution of the obtained microsphere particle sample is 20-120 μm, and the abrasion index is 1.2, which is recorded as FLHZSM -5-B.
[0088] The specific preparation conditions and steps are the same as in Example 3, the difference is that the raw material HZSM-5 zeolite molecular sieve powder has a silicon-aluminum ratio of Si / Al=10, the obtained microsphere particle sample particle size distribution is 20-100 μm, and the wear index is 1.2, denoted as FLHZSM-5-C.
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