Method for directly preparing vanadium nitride by using ammonium polyorthovanadate
A technology of ammonium polyvanadate and vanadium nitride, applied in chemical instruments and methods, nitrogen compounds, nitrogen-metal/silicon/boron binary compounds, etc., can solve the problem of expensive vanadium raw materials, cumbersome process steps, High cost and other problems, to achieve the effect of increasing the contact area of gas-solid reaction, simple process, and reducing consumption
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Embodiment 1
[0022] A method utilizing ammonium polyvanadate to directly prepare vanadium nitride, the steps are as follows:
[0023] 1) Dry ammonium polyvanadate on a wet basis at 80°C for 8 hours to obtain blocky ammonium polyvanadate on a dry basis, which is ground into a powder with a particle size of ≤200 mesh for later use;
[0024] The mass percent composition of wet base ammonium polyvanadate main component is as follows: H 2 O: 14%, V 2 o 5 : 69.5%, Fe: 15%, Si: 0.6%, P: 0.009%, S: 0.07%, K 2 O+Na 2 The O content is 0.6%.
[0025] 2) The block dry ammonium polyvanadate powder 1000g, graphite carbon powder 150g, binder polyvinyl alcohol solution 100g, catalyst metal iron powder 3g, mix evenly to obtain a mixture, the binder is the mass percentage 5% polyvinyl alcohol solution;
[0026] Graphite carbon powder is the reducing agent, particle size ≤ 200 mesh, purity ≥ 98%; catalyst is metal iron powder, particle size ≤ 100 mesh, purity ≥ 99%.
[0027] 3) The mixed material is p...
Embodiment 2
[0031] A method utilizing ammonium polyvanadate to directly prepare vanadium nitride, the steps are as follows:
[0032] 1) Dry ammonium polyvanadate on a wet basis at 100°C for 5 hours to obtain blocky ammonium polyvanadate on a dry basis, which is ground into a powder with a particle size of ≤200 mesh for later use;
[0033] The mass percent composition of wet base ammonium polyvanadate main component is as follows: H 2 O: 13.5%, V 2 o 5 : 70%, Fe: 15%, Si: 0.5%, P: 0.009%, S: 0.08%, K 2 O+Na 2 The O content is 0.3%.
[0034] 2) 1000g of the block dry base ammonium polyvanadate powder, 200g of graphite carbon powder, 100g of binder polyvinyl alcohol solution, and 2.0g of catalyst metal iron powder are mixed evenly to obtain a mixed material, and the binder is a mass percent 2.5% polyvinyl alcohol solution;
[0035] Graphite carbon powder is the reducing agent, particle size ≤ 200 mesh, purity ≥ 98%; catalyst is metal iron powder, particle size ≤ 100 mesh, purity ≥ 99%....
Embodiment 3
[0040] A method utilizing ammonium polyvanadate to directly prepare vanadium nitride, the steps are as follows:
[0041] 1) Dry ammonium polyvanadate on a wet basis at 90°C for 5 hours to obtain blocky ammonium polyvanadate on a dry basis, which is ground into a powder with a particle size of ≤200 mesh for later use;
[0042] The mass percent composition of wet base ammonium polyvanadate main component is as follows: H 2 O: 14.5%, V 2 o 5 : 69%, Fe: 15%, Si: 0.6%, P: 0.007%, S: 0.07%, K 2 O+Na 2 The O content is 0.4%.
[0043] 2) The block dry ammonium polyvanadate powder 1000g, graphite carbon powder 200g, binder polyvinyl alcohol solution 100g, catalyst metal iron powder 2g, mix evenly to obtain a mixture, the binder is the mass percentage 3% polyvinyl alcohol solution;
[0044] Graphite carbon powder is the reducing agent, particle size ≤ 200 mesh, purity ≥ 98%; catalyst is metal iron powder, particle size ≤ 100 mesh, purity ≥ 99%.
[0045] 3) The mixed material is p...
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