Catalyst for synthesis of maleic anhydride and preparation method thereof
A technology of catalyst and maleic anhydride, applied in the field of catalyst for synthesizing maleic anhydride and its preparation, can solve problems such as affecting the morphology and performance of the catalyst, and achieve the effect of improving the catalytic performance
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Embodiment 1
[0025] After ball milling 1 part of industrial-grade ammonium metavanadate, the particle size is 1-15 μm, stirring in 3.6 parts of ethylene glycol solution at 350r / min for 5 hours, and then roasting in a roasting furnace at 350°C for 5 hours after suction filtration to obtain refined Ammonium metavanadate, the particle size is 1-8μm, and the specific surface area is 21m 2 / g, with a rich pore structure. Mix the refined 30g of ammonium metavanadate with 300ml of isobutanol, add 35g of 100wt% phosphoric acid and 1g of phosphomolybdic acid, heat and reflux under stirring for 15h, filter and dry the resulting product, and heat-treat at 400°C to obtain a catalyst . Gained catalyst is reacted with the butane raw material whose molar concentration is 1.5% mol, and its reaction process condition: 2000hr -1 Space velocity and 400°C normal pressure were evaluated in a fixed-bed reactor, and the conversion rate of butane was measured to be 83.5%, and the yield of maleic anhydride was 6...
Embodiment 2
[0027] After ball milling 1 part of industrial-grade ammonium metavanadate, the particle size is 1-15 μm, stirring in 3.6 parts of glycerol solution at 350 r / min for 5 hours, suction filtering and roasting at 350 °C for 5 hours in a roasting furnace to obtain refined Ammonium metavanadate, the particle size is 1-8μm, and the specific surface area is 22m 2 / g, with a rich pore structure. Mix the refined 30g of ammonium metavanadate with 300ml of isobutanol, add 35g of 100wt% phosphoric acid and 1g of phosphomolybdic acid, heat and reflux under stirring for 15h, filter and dry the resulting product, and heat-treat at 400°C to obtain a catalyst . Gained catalyst is reacted with the butane raw material whose molar concentration is 1.5% mol, and its reaction process condition: 2000hr -1 Space velocity and 400°C normal pressure were evaluated in a fixed-bed reactor, and the conversion rate of butane was measured to be 83.6%, and the yield of maleic anhydride was 61.7%. The evaluat...
Embodiment 3
[0029] After ball milling 1 part of industrial-grade ammonium metavanadate, the particle size is 1-15 μm, stirring in 3.6 parts of pentaerythritol solution at 350 r / min for 5 hours, and then roasting in a roasting furnace at 350 ° C for 5 hours after suction filtration to obtain refined metavanadate Ammonium vanadate, the particle size is 1-8μm, the specific surface area is 21m 2 / g, with a rich pore structure. Mix the refined 30g of ammonium metavanadate with 300ml of isobutanol, add 35g of 100wt% phosphoric acid and 1g of phosphomolybdic acid, heat and reflux under stirring for 15h, filter and dry the resulting product, and heat-treat at 400°C to obtain a catalyst . Gained catalyst is reacted with the butane raw material whose molar concentration is 1.5% mol, and its reaction process condition: 2000hr -1 The space velocity and 400°C normal pressure were evaluated in a fixed-bed reactor, and the conversion rate of butane was measured to be 83.3%, and the yield of maleic anh...
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