Method used for preparing phenethylene through alkylation on side chains of toluene and methanol
A technology of alkylation and styrene, applied in chemical instruments and methods, catalyst activation/preparation, organic chemistry, etc., can solve the problems of low selectivity of ethyl styrene and low conversion rate of toluene
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Embodiment 1
[0022] Take 10 grams of silicon-aluminum molar ratio SiO 2 / Al 2 o 3 For X-type zeolite molecular sieve raw powder of 2, use 0.1mol / L potassium acetate as the exchange liquid to exchange the molecular sieve, and exchange 3 times at 50°C according to the solid-liquid ratio of 5, and each exchange time is 2 hours; then wash , suction filtration, and the filter cake was dried at 80° C. for 4 hours. The obtained molecular sieve was exchanged with 0.1mol / L magnesium nitrate as the exchange liquid, and exchanged three times at 50°C according to a solid-to-liquid ratio of 5, and each exchange time was 2 hours; after that, washing and suction filtration, the filter cake was Dry at 80°C for 4 hours. The molecular sieve was calcined at 500°C for 4 hours, and then cooled in a desiccator to obtain a KMgX type molecular sieve. Tablet forming and crushing into 40-60 mesh particles to obtain the finished catalyst.
[0023] 3.0 grams of the above-mentioned finished product catalysts are ...
Embodiment 2
[0026] Take 10 grams of silicon-aluminum molar ratio SiO 2 / Al 2 o 3 The original powder of Y-type zeolite molecular sieve is 4, and the molecular sieve is exchanged with 0.5mol / L potassium chloride as the exchange liquid, and exchanged three times at 90°C according to the solid-liquid ratio of 15, and each exchange time is 2 hours; After washing and suction filtration, the filter cake was dried at 150° C. for 4 hours. The obtained molecular sieve was exchanged with 0.5mol / L calcium chloride as the exchange liquid, and exchanged three times at 90°C according to the solid-to-liquid ratio of 15, and each exchange time was 2 hours; after that, washing, suction filtration, and filter cake Dry at 150°C for 4 hours. The molecular sieve was calcined at 800°C for 4 hours, and then cooled in a desiccator to obtain a KCaY molecular sieve. Tablet forming and crushing into 40-60 mesh particles to obtain the finished catalyst.
[0027] The activity evaluation was carried out according...
Embodiment 3
[0030] Take 10 grams of silicon-aluminum molar ratio SiO 2 / Al 2 o 3 For X-type zeolite molecular sieve raw powder of 2, use 1.0mol / L cesium nitrate as the exchange liquid to exchange the molecular sieve, and exchange 3 times at 80°C according to the solid-to-liquid ratio of 10, each exchange time is 2 hours; then wash , suction filtration, and the filter cake was dried at 110° C. for 4 hours. The obtained molecular sieve was exchanged with 1.0mol / L magnesium nitrate as the exchange liquid, and exchanged three times at 80°C according to the solid-to-liquid ratio of 10, and each exchange time was 2 hours; after that, washing and suction filtration, the filter cake was Dry at 110°C for 4 hours. The molecular sieve was calcined at 600° C. for 4 hours, and then cooled in a desiccator to obtain a CsMgX type molecular sieve. Tablet forming and crushing into 40-60 mesh particles to obtain the finished catalyst.
[0031] The activity evaluation was carried out according to the ev...
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