Cobalt modification silicoaluminophosphate molecular sieve and its preparation and catalytic application in MTO
A technology of silicoaluminophosphate and molecular sieve, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low conversion rate of raw materials, selectivity of low-carbon olefins, and low service life, and achieve selectivity High, good catalytic performance, long catalyst life effect
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Embodiment 1
[0025] Synthesis of Co-SAPO-34 Molecular Sieve 1
[0026] According to the ratio: 3.0TEA: 0.75SiO 2 : Al 2 o 3 : 2.0H 3 PO4:0.02Co(NO 3 ) 2 : 60H 2 O Weigh the raw material. Mix a certain amount of pseudo-boehmite and a certain amount of water thoroughly, then add H 3 PO 4 , Co(NO 3 ) 2 , silica sol, TEA (triethylamine), fully stirred for a certain period of time until uniform. The prepared gel was transferred into a 200ml crystallization kettle, sealed and crystallized at 190°C for 72 hours. The solid product was taken out, washed repeatedly with deionized water until it became neutral, and placed in a drying oven at 110° C. to dry overnight to obtain Co-SAPO-34 molecular sieve product 1.
Embodiment 2
[0028] Synthesis of Co-SAPO-34 Molecular Sieve 2
[0029] According to the ratio: 3.0TEA: 0.75SiO 2 : Al 2 o 3 : 2.0H 3 PO 4 : 0.05Co(NO 3 ) 2 : 60H 2 O Weigh the raw material. Mix a certain amount of pseudo-boehmite and a certain amount of water thoroughly, then add H 3 PO 4 , Co(NO 3 ) 2 , silica sol, TEA, fully stirred for a certain period of time until uniform. The prepared gel was transferred into a 200ml crystallization kettle, sealed and crystallized at 190°C for 72 hours. The solid product was taken out, washed repeatedly with deionized water until it became neutral, and placed in a drying oven at 110° C. to dry overnight to obtain Co-SAPO-34 molecular sieve product 2.
Embodiment 3
[0031] Synthesis of Co-SAPO-34 Molecular Sieve 3
[0032] According to the ratio: 3.0TEA: 0.75SiO 2 : Al 2 o 3 : 2.0H 3 PO 4 : 0.10Co(NO 3 ) 2 : 60H 2 O Weigh the raw material. Mix a certain amount of pseudo-boehmite and a certain amount of water thoroughly, then add H 3 PO 4 , Co(NO 3 ) 2 , silica sol, TEA, fully stirred for a certain period of time until uniform. The prepared gel was transferred into a 200ml crystallization kettle, sealed and crystallized at 190°C for 72 hours. The solid product was taken out, washed repeatedly with deionized water until it became neutral, and placed in a drying oven at 110° C. to dry overnight to obtain Co-SAPO-34 molecular sieve product 3.
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