| abstract |
The invention discloses a preparation method of vanadium iron phosphate. Pour ammonium metavanadate, aluminum chloride, ferrous chloride, ammonium dihydrogen phosphate and polyethylene glycol 2000 into the mixer and mix evenly, then add hot pure water and stir for 60 minutes to obtain a slurry; add the slurry to After the hydrazine hydrate solution, stir and mix evenly, then add an acid-base regulator to adjust the pH of the slurry to 2.5, heat up to 95 ° C, and then stir for 4 hours at a stirring speed of 300 r/min to obtain a reaction material; add the reaction material into Stir and grind in the stirring mill until the particle size of the slurry is 0.67 μm, then take it out from the stirring mill, discharge it into the reaction kettle, add n-butyl titanate under stirring, then continue to stir and react for 30 minutes, and then spray dry to obtain a spray Drying material; calcining the spray-dried material under inert gas to obtain vanadium iron phosphate. The process of the invention is simple, no waste water is generated, and the obtained ammonium chloride can be recycled. |