Method for the dehydrogenation of low-carbon alkanes
A low-carbon alkane, dehydrogenation technology, applied in the direction of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problems of poor catalyst stability, low mechanical strength of catalysts, easy to crush, etc., and achieve the effect of stable performance
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Embodiment 1
[0027] Add 90g of pseudo-boehmite raw powder with an average particle size of 9-30μm or other inorganic oxygen-containing compounds of aluminum to 220.2g of pseudo-boehmite raw powder with an average particle size of 40μm, and then add 9g of safflower powder Then add 130ml of deionized water, knead well, extrude, leave at room temperature for 12 hours, then hold at 90°C for 3 hours, then dry at 120°C for 10 hours, and process at 750°C to obtain the carrier.
[0028] The mixed alumina carrier obtained adopts impregnation technology to support platinum and tin components, that is, the aqueous solution of chloroplatinic acid and tin chloride is impregnated with the obtained alumina carrier at room temperature for 24 hours (metal platinum loading 0.4%, Pt:Sn=1:5), then dried at 60°C, baked at 530°C in air flow for 3 hours, then treated with water vapor at 530°C for 4 hours, and finally treated with dry air at 530°C for 1 hour.
[0029] The sample was reductively activated with hyd...
Embodiment 2
[0036] Add 98g of alumina component B pseudo-boehmite raw powder with different average particle sizes to 236g of pseudo-boehmite raw powder alumina component A main material with an average particle size of 32μm, then add 12g of turmeric powder and then add 140ml of deionized water was fully kneaded, extruded, left at room temperature for 12 hours, then kept at 90°C for 3 hours, then dried at 120°C for 10 hours, and treated at 750°C to obtain a carrier.
[0037] The mixed alumina carrier obtained adopts impregnation technology to support platinum and tin components, that is, the aqueous solution of chloroplatinic acid and tin chloride is impregnated with the obtained alumina carrier at room temperature for 24 hours (metal platinum loading 0.4%, Pt:Sn=1:2), then dried at 60°C, baked at 530°C in air flow for 3 hours, then treated with water vapor at 530°C for 4 hours, and finally treated with dry air at 530°C for 1 hour.
[0038] The sample was reductively activated with hydrog...
Embodiment 3
[0042] In 220g of alumina component A pseudo-boehmite raw powder with an average particle size of 40 μm, different amounts of alumina component B pseudo-boehmite raw powder with an average particle size of 26 μm were added respectively, and then 9 g of fenugreek was added Add 130ml of deionized water to the powder, knead well, extrude, place at room temperature for 12 hours, then keep at 90°C for 3 hours, and then dry at 120°C for 10 hours, and process at 750°C to obtain the carrier. The obtained mixed carrier was loaded with platinum tin active components in the same manner as in Example 1.
[0043] The sample was reductively activated with hydrogen at 500°C for 90 minutes before the dehydrogenation reaction, and was used for isobutane dehydrogenation reaction. Catalyst at 550°C, normal pressure, isobutane mass space velocity 4.6 hours -1 , H 2 / C 4 h 10 Under the condition of 2:5, the reaction results after 72 hours are shown in Table 3.
[0044] table 3
[0045]
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