Catalyst for preparing maleic anhydride from n-butane through oxidation and preparation method thereof
A catalyst, n-butane technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high compressive strength, low compressive strength, low wear rate, etc. The effect of high compressive strength, low wear rate and low wear rate
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Embodiment 1
[0024] Mix 0.5 g of cobalt oxalate with 120 mL of benzyl alcohol and 360 mL of isobutanol, then add 50.4 g of vanadium pentoxide, and then add 65 mL of phosphoric acid. After heating and refluxing for 16 hours under continuous stirring, the resultant product is filtered and dried to obtain VPO catalyst precursor powder , The powdered catalyst precursor was sieved, and 50g of the precursor smaller than 200 mesh was taken and mixed with 1.5g of graphite powder to form a mixture A; the above mixture A was kept at a temperature of 30°C and a constant humidity of 85%. Treated in an oven for 12h; then press tablets under 20MPa pressure to obtain a one-time shaped catalyst structure; then crush it, sieving, and take 80-140 mesh parts; transfer the above-mentioned pre-granulated particles to a rotary tablet press, and the catalyst structure The height of the material is 5mm, and the catalyst structure is obtained. The lateral compressive strength is 132N / cm and the attrition rate is 2.3...
Embodiment 2
[0026] Mix 0.5 g of cobalt oxalate with 120 mL of benzyl alcohol and 360 mL of isobutanol, then add 50.4 g of vanadium pentoxide, and then add 65 mL of phosphoric acid. After heating and refluxing for 16 hours under continuous stirring, the resultant product is filtered and dried to obtain VPO catalyst precursor powder , The powdered catalyst precursor was sieved, and 50g of the precursor smaller than 200 mesh was taken and mixed with 1.5g of graphite powder to form mixture A; adding 5g of pore former stearic acid to the above mixture A, at a temperature of 30℃ , The equivalent humidity is 85% in a constant temperature and humidity oven for 12h; then press tablets under a pressure of 20MPa to obtain a once-shaped catalyst structure; then crush it, sieving, and take the 80-140 mesh part; the above-mentioned pre-granulation The particles were transferred to a rotary tablet press. The height of the catalyst structure was 6mm to obtain a catalyst structure. The lateral compressive s...
Embodiment 3
[0028] Mix 0.5 g of cobalt oxalate with 120 mL of benzyl alcohol and 360 mL of isobutanol, then add 50.4 g of vanadium pentoxide, and then add 65 mL of phosphoric acid. After heating and refluxing for 16 hours under continuous stirring, the resultant product is filtered and dried to obtain VPO catalyst precursor powder , The powdery catalyst precursor is sieved, and 50g of the precursor smaller than 200 mesh is taken, and 1.5g of graphite powder is thoroughly mixed to form a mixture A; the above mixture A is at a temperature of 30℃ and a corresponding humidity of 85% at a constant temperature and humidity Treat it in an oven for 12h; then press tablets under 20MPa pressure to obtain a one-time shaped catalyst structure; then crush it, sieving, and take the 80-140 mesh part as pre-granulated particles; add the above-mentioned pre-granulated particles to pores 5g of stearic acid was transferred to a rotary tablet press. The height of the catalyst structure was 5mm to obtain a cata...
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