A kind of supported catalyst with mesoporous structure and its preparation method and application
A supported catalyst and mesoporous structure technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrocarbon production from halogen-containing organic compounds, etc., can solve problems such as low selectivity of a single product, and no methyl bromide has been found. Achieve the effects of simple preparation method, improved selectivity, and easy industrialization
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Embodiment 1
[0024] Measure 100mL of ethanol as a solvent, add 3.8g of P123 and stir to dissolve it, weigh 9.6g of aluminum isopropoxide and 5.4mL of concentrated nitric acid into the solution, stir at room temperature until dissolved, add zirconium nitrate, and stir at 30°C for 8 hours; The obtained samples were aged at 70°C for 36 hours and calcined at 650°C for 6 hours to obtain modified mesoporous alumina. An aqueous solution containing zinc nitrate was prepared, loaded on an alumina carrier by an equal volume impregnation method, aged at room temperature for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 4 hours to obtain a catalyst precursor. Use a continuous flow fixed-bed reactor to treat the catalyst precursor under a mixed atmosphere, wherein the volume content of methyl bromide is 30%, and the balance is nitrogen, and the treatment conditions are 230°C, 0.1MPa, 100h -1 , the time is 4h. Prepared methyl halide to produce isobutylene catalyst, by weight, ZnBr 2 c...
Embodiment 2
[0027] Measure 100mL of ethanol as a solvent, add 4.1g of P123 and stir to dissolve it, weigh 10g of aluminum isopropoxide and 6.1mL of concentrated nitric acid into the solution, stir at room temperature until dissolved, add zirconium nitrate, and stir at 40°C for 6h; The sample was aged at 60°C for 48h and calcined at 500°C for 10h to obtain modified mesoporous alumina. An aqueous solution containing zinc nitrate was prepared, loaded on an alumina carrier by an equal volume impregnation method, aged at room temperature for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 4 hours to obtain a catalyst precursor. Use a continuous flow fixed-bed reactor to treat the catalyst precursor under a mixed atmosphere, wherein the volume content of methyl bromide is 30%, and the balance is nitrogen, and the treatment conditions are 230°C, 0.1MPa, 100h -1 , the time is 4h. Prepared methyl halide to produce isobutylene catalyst, by weight, ZnBr 2 content is 30%, ZnO content...
Embodiment 3
[0030] Measure 100mL of ethanol as a solvent, add 4.6g of P123 and stir to dissolve it, weigh 7.9g of aluminum isopropoxide and 4.8mL of concentrated nitric acid into the solution, stir at room temperature until dissolved, add zirconium nitrate, and stir at 50°C for 5h; The obtained samples were aged at 70°C for 48 hours and calcined at 650°C for 6 hours to obtain modified mesoporous alumina. An aqueous solution containing zinc nitrate was prepared, loaded on an alumina carrier by an equal volume impregnation method, aged at room temperature for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 4 hours to obtain a catalyst precursor. Use a continuous flow fixed-bed reactor to treat the catalyst precursor under a mixed atmosphere, wherein the volume content of methyl bromide is 30%, and the balance is nitrogen, and the treatment conditions are 230°C, 0.1MPa, 100h -1 , the time is 4h. Prepared methyl halide to produce isobutylene catalyst, by weight, ZnBr 2 conten...
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