A kind of preparation method of deep desulfurization catalyst
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Embodiment 1
[0012] Catalyst preparation method is as follows:
[0013] (1) Molecular sieves are obtained as catalyst supports by surface modification of 13X molecular sieves. The modification process includes pretreatment of molecular sieves with strong acid (sulfuric acid) and strong oxidant (hydrogen peroxide). The volume ratio of strong acid and strong oxidant is 1:1 to improve Molecular sieve surface properties; then use a solution of rare earth metal ions (cerium nitrate) to impregnate the pretreated molecular sieve with equal volume to realize ion exchange, and the concentration of the rare earth metal ions is 0.1mol / L.
[0014] (2) Take 2g of the above-mentioned molecular sieve carrier, dry it at 400°C for 2 hours, add it to the reactor after cooling, and add 60mL of toluene and 0.2mL of silane coupling agent to it, reflux for 4 hours, after cooling, wash with a large amount of ethanol three times After that, it was dried under reduced pressure at 100°C for 3 hours, and the silane ...
Embodiment 2
[0019] Catalyst preparation method is as follows:
[0020] (1) Molecular sieves are obtained as catalyst supports by surface modification of 13X molecular sieves. The modification process includes pretreatment of molecular sieves with strong acid (hydrochloric acid) and strong oxidant (hydrogen peroxide). The volume ratio of strong acid and strong oxidant is 1:2 to improve Molecular sieve surface properties; then use transition metal ion (copper nitrate) solution to carry out equal volume impregnation to the pretreated molecular sieve to realize ion exchange, and the transition metal ion concentration is 0.2mol / L.
[0021] (2) Take 2g of the above-mentioned molecular sieve carrier, dry it at 400°C for 2 hours, add it into the reactor after cooling, and add 60mL of toluene and 0.3mL of silane coupling agent to it, reflux for 8 hours, after cooling, wash with a large amount of ethanol three times Afterwards, dry under reduced pressure at 100°C for 3 hours, and the silane couplin...
Embodiment 3
[0026] Catalyst preparation method is as follows:
[0027] (1) Molecular sieves are obtained as catalyst supports by surface modification of ZSM-5 molecular sieves. The modification process includes pretreatment of molecular sieves with strong acid (hydrochloric acid) and strong oxidant (hydrogen peroxide). The volume ratio of strong acid and strong oxidant is 1:1. To improve the surface properties of the molecular sieve; then use the solution of transition metal ions (cobalt nitrate) to impregnate the pretreated molecular sieve with equal volume to realize ion exchange, and the concentration of the rare earth metal ion or transition metal ion is 0.1mol / L.
[0028] (2) Take 2g of the above-mentioned molecular sieve carrier, dry it at 400°C for 2 hours, add it into the reactor after cooling, and add 60mL of toluene and 0.4mL of silane coupling agent to it, reflux for 6h, after cooling, wash with a large amount of ethanol three times Afterwards, dry under reduced pressure at 100...
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