Catalyst with modified alumina as carrier, and preparation method and application thereof
A technology of alumina carrier and catalyst, which is applied in physical/chemical process catalysts, chemical instruments and methods, and hydrocarbon production from halogen-containing organic compounds. problem, to achieve the effect of simple preparation method, mild reaction conditions and easy industrialization
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Embodiment 1
[0027] Weigh commercially available alumina (pore volume is 0.96ml / g, specific surface area is 286.81m 2 / g, the saturated water absorption is 145ml / g, provided by Fushun Branch of Sinopec Catalyst Co., Ltd., the following examples and comparative examples all use this alumina), the mass concentration is 5% pyridine aqueous solution saturated spray impregnated alumina Immediately after finishing, dry at 95°C for 1 h, the adsorption amount of the dried pyridine aqueous solution is 60% of the saturated absorption solution of the alumina carrier, aging at 60°C for 7 h, drying at 100°C for 24 hours, and then calcining at 300°C for 5 The modified alumina carrier was prepared in hours. Weigh an appropriate amount of manganese nitrate and dissolve it in deionized water, add ammonium thiocyanate so that the mass fraction of ammonium thiocyanate in the solution is 2%, and the manganese salt solution is loaded on the above-mentioned alumina carrier by equal volume impregnation method, a...
Embodiment 2
[0031] Weigh commercially available alumina, saturate spray and impregnate the alumina with a mass concentration of 20% diethanolamine aqueous solution, and immediately dry at 110°C for 0.5h after drying until the adsorption amount of the diethanolamine aqueous solution is the amount of the saturated absorption solution of the alumina carrier. 40%, aged at 80°C for 4 hours, dried at 120°C for 8 hours, and then calcined at 400°C for 3 hours to obtain a modified alumina carrier. Weigh an appropriate amount of manganese nitrate and dissolve it in deionized water, add ammonium thiocyanate so that the mass fraction of ammonium thiocyanate in the solution is 15%, and the manganese salt solution is loaded on the above-mentioned alumina carrier by equal volume impregnation method, and dried at 100 °C 6h, and calcined at 400°C for 8h to prepare the catalyst precursor. The catalyst precursor is placed in a continuous flow fixed-bed reactor, and the catalyst precursor is treated with a m...
Embodiment 3
[0035] Weigh commercially available alumina, saturate spray and impregnate the alumina with a mass concentration of 20% diethanolamine aqueous solution, and immediately dry at 110°C for 0.5h after drying until the adsorption amount of the diethanolamine aqueous solution is the amount of the saturated absorption solution of the alumina carrier. 40%, aged at 80°C for 4 hours, dried at 120°C for 8 hours, and then calcined at 400°C for 3 hours to obtain a modified alumina carrier. Weigh an appropriate amount of manganese nitrate and dissolve it in deionized water, add ammonium thiocyanate so that the mass fraction of ammonium thiocyanate in the solution is 10%, and the manganese salt solution is loaded on the above-mentioned alumina carrier by equal volume impregnation method, and dried at 120 °C 4h, calcination at 500°C for 4h to prepare the catalyst precursor. The catalyst precursor is placed in a continuous flow fixed-bed reactor, and the catalyst precursor is treated with a mi...
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