Catalyst for shape-selective catalysis synthesis of p-ethyltoluene from C8 aromatic hydrocarbon
A technology of C8 aromatics and shape-selective catalysis, which is applied in the direction of carbon compound catalysts, catalysts, physical/chemical process catalysts, etc., and can solve the problem of high raw material costs
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Embodiment 1
[0028] With silicon-aluminum molecular ratio being 27 ZSM-5 molecular sieves and 20% by weight silicon dioxide shaped catalyst 100g, 1.0wt% CaO content Ca(NO 3 ) 2 67.0 g of the same volume impregnated shaped catalyst, dried and calcined to obtain a catalyst intermediate. The catalyst was obtained by impregnating 120 g of 10 wt % DC550 silicone oil, filtering, drying, and roasting at 500° C. for 6 h 4 times.
[0029] Get 5.0 grams of the prepared catalyst amount, and carry out the disproportionation reaction activity of mixed C8 aromatics aromatics (ethylbenzene: p-xylene: o-xylene: m-xylene molar ratio 0.02:1:0.8:2) on the fixed-bed reaction evaluation device And selectivity investigation (all following examples all adopt this method to evaluate). At a weight airspeed of 4.0h －1 , the reaction temperature is 400°C, the reaction pressure is 2.8MPa, and the molar ratio of hydrogen to hydrocarbon is 1.8. The reaction results showed that the conversion rate of p-xylene was 0....
Embodiment 2
[0038] With silicon-aluminum molecular ratio being 12 ZSM-22 molecular sieves and 60% by weight silica molding catalyst 100g, 1.6wt% contains MgO amount Mg(NO 3 ) 2 67.0 g of the same volume impregnated shaped catalyst, dried and calcined to obtain a catalyst intermediate. The catalyst was obtained by impregnating 120 g of 15 wt % DC550 silicone oil, filtering, drying, and roasting at 550° C. for 4 h 4 times.
[0039] Get 5.0 grams of the catalyst amount that makes, carry out mixed carbon eight aromatics aromatics (ethylbenzene: p-xylene: o-xylene: meta-xylene mol ratio 1.0: 1.0: 0.8: 2.0) reaction activity and Selective inspection. At a weight airspeed of 4.0h －1 , the reaction temperature is 400°C, the reaction pressure is 2.8MPa, and the molar ratio of hydrogen to hydrocarbon is 2. The reaction results showed that the conversion rate of p-xylene was 26.0%, the conversion rate of ethylbenzene was 30.0%, the selectivity of p-methyl-ethylbenzene was 98.0%, the selectivity ...
Embodiment 3
[0041] With silicon-aluminum molecular ratio being 100 ZSM-23 molecular sieve and 25% by weight silicon dioxide shaped catalyst 100g, 0.11wt% MgO content Mg(NO 3 ) 2 67.0 g of the same volume impregnated shaped catalyst, dried and calcined to obtain a catalyst intermediate. The catalyst was obtained by impregnating 120 g of 1.0 wt % DC550 silicone oil, filtering, drying, and then roasting at 500° C. for 3 h once.
[0042] Get 5.0 grams of the catalyst amount that makes, carry out mixed C8 aromatics (ethylbenzene: p-xylene: o-xylene: m-xylene molar ratio 2.0: 0.5: 1.0: 1.0) reaction activity and selection on the fixed-bed reaction evaluation device sex inspection. At a weight space velocity of 0.1h －1 , the reaction temperature is 500°C, the reaction pressure is 10.0MPa, and the molar ratio of hydrogen to hydrocarbon is 0. The reaction results showed that the conversion rate of p-xylene was 36.0%, the conversion rate of ethylbenzene was 10.0%, the selectivity of p-methyl-et...
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