Vanadium-based liquid-phase catalyst and preparation method thereof
A liquid-phase catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of catalyst specific surface area reduction, catalyst clogging, high cost of vanadium-based catalysts, etc.
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Embodiment 1
[0054] Prepare a 0.2mol / L sodium metavanadate aqueous solution; mix the resulting aqueous solution with the fatty chain primary amine N1923 in a ratio of 1:1, and add 1:1 H 2 SO 4 Aqueous solution, adjust the equilibrium pH after the reaction at 6-8. Take the reacted organic phase and deionized water in a ratio of 1:10 and fully mix and wash the organic phase. After the washed organic phase was dehydrated by a centrifuge at 2000 rpm, it was placed in an environment of 4° C. and aged for 48 hours to prepare a vanadium-based liquid-phase catalyst.
[0055] Take 50ml of the catalyst prepared above, pass argon gas at 100°C for 30 minutes, and then feed the reaction gas, the reaction gas is composed of NH 3 , NO, SO 2 , O 2 and diluent N 2 Composition, where NH 3 , NO is 1000ppm, SO 2 500ppm, O 2 5%. Control airspeed 10000h -1 , the reaction temperature is 200°C, and the residence time in the liquid phase catalyst is 1s. After the reaction, SO 2 The conversion rate reac...
Embodiment 2
[0060] Prepare an aqueous solution to be reacted, which contains 0.1mol / L sodium metavanadate, 0.2mol / L sodium molybdate, and 0.2mol / L sodium tungstate; compare the resulting aqueous solution to be reacted with the quaternary ammonium salt N263 by 2: 1 mix, by supplementing with 1:1 H 2 SO 4 Aqueous solution, adjust the equilibrium pH after the reaction at 6-8. Take the reacted organic phase and deionized water in a ratio of 1:10 and fully mix and wash the organic phase. After the washed organic phase was dehydrated by a centrifuge at 2000 rpm, it was placed in an environment of 100° C. for 48 hours of static aging to prepare a vanadium-based liquid-phase catalyst containing Mo and W.
[0061] Take 50ml of the catalyst prepared above, pass argon gas at 100°C for 30 minutes, and then feed the reaction gas, the reaction gas is composed of NH 3 , NO, SO 2 , O 2 and diluent N 2 Composition, where NH 3 , NO is 1000ppm, SO 2 500ppm, O 2 5%. Control airspeed 10000h -1 , th...
Embodiment 3
[0063] Prepare an aqueous solution to be reacted, which contains 0.1mol / L sodium metavanadate, 0.2mol / L sodium molybdate, and 0.2mol / L sodium tungstate; prepare tertiary amine TOA, primary amine Primene JM-T, and secondary amine 7203 The organic phase mixed at a volume ratio of 1:1:1; the organic phase and the aqueous solution are mixed at a ratio of 1:1, and the H 2 SO 4 Aqueous solution, adjust the equilibrium pH after the reaction at 6-8. Take the reacted organic phase and deionized water in a ratio of 1:10 and fully mix and wash the organic phase. After the washed organic phase is dehydrated by a 2000rpm centrifuge, it is placed in an environment of 100°C and mixed with n-triacane in a volume ratio of 1:1, and then left to mature for 48 hours to prepare a vanadium-based compound containing Mo and W. liquid phase catalyst.
[0064] Take 50ml of the catalyst prepared above, pass argon gas at 100°C for 30 minutes, and then feed the reaction gas, the reaction gas is compose...
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