Recycling treatment method of waste vanadium catalyst
A waste vanadium catalyst, recovery and treatment technology, applied in chemical instruments and methods, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve the problems of complex treatment process, toxic substance pollution, environmental pollution, etc. High, low disposal cost, environmentally friendly effect
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Embodiment 1
[0025] The recovery treatment method of the spent vanadium catalyst of the present embodiment, it may further comprise the steps:
[0026] Step A: washing the spent vanadium catalyst with a protective solution containing a diester precipitator and oxalic acid, wherein, in the protective solution, the mass fraction of the diester precipitant is 1.5%, and the oxalic acid is 2.5%.
[0027] Step B: Spin and dry the spent vanadium catalyst to obtain a dried spent vanadium catalyst, wherein the spent vanadium catalyst needs to be dried at 100° C. for 2 hours.
[0028] Step C: Soak the dried spent vanadium catalyst in an oxalic acid solution containing 80% by mass fraction, heat at 40°C, add vanadium pentoxide with a mass fraction of 8% to the above solution, heat the solution to 102°C, and react for 5 hours, Then drain or spin dry to obtain an intermediate product containing spent vanadium catalyst. In this step, the pentavalent vanadium stored in the spent vanadium catalyst is con...
Embodiment 2
[0032] The recovery treatment method of the spent vanadium catalyst of the present embodiment, it may further comprise the steps:
[0033] Step A: Washing the spent vanadium catalyst with a protective solution containing a diester precipitator and oxalic acid, wherein, in the protective solution, the mass fraction of the diester precipitant is 0.5%, and the oxalic acid is 1.5%.
[0034] Step B: Spin and dry the spent vanadium catalyst to obtain a dried spent vanadium catalyst, wherein the spent vanadium catalyst needs to be dried at 100° C. for 2 hours.
[0035] Step C: Soak the dried spent vanadium catalyst in an oxalic acid solution containing 30% by mass fraction, heat at 30°C, add vanadium pentoxide with a mass fraction of 2% to the above solution, heat the solution to 80°C, and react 2-5 hours, and then drained or spin-dried to obtain an intermediate product containing spent vanadium catalyst. In this step, the pentavalent vanadium stored in the spent vanadium catalyst i...
Embodiment 3
[0039] The recovery treatment method of the spent vanadium catalyst of the present embodiment, it may further comprise the steps:
[0040] Step A: washing the spent vanadium catalyst with a protection solution containing a diester precipitator and oxalic acid, wherein, in the protection solution, the mass fraction of the diester precipitator is 1%, and the mass fraction of oxalic acid is 2%.
[0041] Step B: Spin and dry the spent vanadium catalyst to obtain a dried spent vanadium catalyst, wherein the spent vanadium catalyst needs to be dried at 100° C. for 2 hours.
[0042] Step C: Soak the dried spent vanadium catalyst in an oxalic acid solution containing 30-80% by mass fraction, heat at 35°C, add vanadium pentoxide with a mass fraction of 5% to the above solution, heat the solution to 90°C, and react 3 hours, and then drained or spin-dried to obtain an intermediate product containing spent vanadium catalyst. In this step, the pentavalent vanadium stored in the waste vana...
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