Method for producing propylene through catalytic cracking C4 olefin
A catalytic cracking and olefin technology, applied in the direction of hydrocarbon cracking, organic chemistry, etc., can solve problems affecting conversion rate, selectivity and high space velocity performance, etc.
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Embodiment 1 and comparative example 1
[0021] After crystallization, 150 grams of ZSM-5 molecular sieve a, washed and dried, was mixed with 18 grams of 40% (weight) silica sol, extruded and dried at 120° C. to obtain sample A-1.
[0022] Put 80 grams of sample A-1 into a closed reaction kettle, and treat it at a temperature of 110°C for 120 hours in an aqueous solution containing n-butylamine template agent. ml, 5 wt% NH 4 NO3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After the exchange, it was dried at 120°C and calcined at 600°C to obtain catalyst A with a crystallinity of 98.8%.
[0023] After 80 grams of sample A-1 was roasted, it was placed in 1000 milliliters of 5% by weight NH 4 NO 3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After the exchange, it was dried at 120°C and calcined at 600°C to obtain comparative catalyst A.
[0024] Catalyst A and A comparative catalyst were used respectively, and the mixed carbon fou...
Embodiment 2～5 and comparative example 2～3
[0027] After crystallization, 150 grams of ZSM-5 molecular sieve b, washed and dried, was mixed with 71 grams of 40% (weight) silica sol, extruded and dried at 120°C to obtain sample B-1.
[0028] Put 70 grams of sample B-1 into a closed reaction kettle, and treat it at a temperature of 150°C for 96 hours in the steam containing n-butylamine template agent. ml, 5 wt% NH 4 NO 3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After the exchange, catalyst B was obtained by drying at 120°C and calcining at 600°C with a crystallinity of 91.2%.
[0029] After 70 grams of sample B-1 was roasted, it was placed in 800 ml of 5% by weight NH 4 NO 3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After exchange, dry at 120°C and calcinate at 600°C to obtain comparative catalyst B.
[0030] Catalyst B and B comparative catalyst are used respectively, and the mixed carbon four after extraction from the ethyl...
Embodiment 6 and comparative example 4
[0033] After crystallization, 150 grams of ZSM-5 molecular sieve c, washed and dried, was mixed with 139 grams of 40% (weight) silica sol, extruded and dried at 120°C to obtain sample C-1.
[0034] Put 80 grams of sample C-1 into a closed reaction kettle, and treat it at 200°C for 24 hours in the steam containing the templating agent. % wt NH 4 NO 3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After the exchange, it was dried at 120°C and calcined at 600°C to obtain catalyst C with a crystallinity of 96.1%.
[0035] After 80 grams of sample C-1 was roasted, it was placed in 1000 ml of 5% by weight NH 4 NO 3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After the exchange, it was dried at 120°C and calcined at 600°C to obtain comparative catalyst C.
[0036] Catalysts C and C were used as comparative catalysts respectively, and the etherified C4 from the ethylene plant was used as the raw m...
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