Method for producing high purity vanadic anhydride
A technology of vanadium pentoxide and a production method, applied in vanadium oxide and other directions, can solve the problems of uneven product quality, harm, excessive impurity content, etc., and achieve the effects of high purity, simple production equipment and less impurities
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[0024] Example 1
[0025] 1) Add 100Kg of ammonium metavanadate to 350Kg of water, add ammonia water when heated to 80°C, add while stirring, until the ammonium metavanadate is completely dissolved;
[0026] 2) Add an appropriate amount of alum to remove Si in the solution, add a mixture of sodium hydroxide and sodium carbonate to remove; Pb, Fe, Ca, Cu, Ni, As, Cr, Cd and other elements, and then undergo natural precipitation and clarification.
[0027] 3) When the supernatant from which impurities are removed is heated to 80°C, the oxidant KClO is added to the solution 3 , Add while stirring to oxidize the divalent vanadium in the solution to pentavalent vanadium, KClO 3 The added amount is 1.5kg;
[0028] 4) The fully oxidized solution is heated to 95°C in the reactor, and sulfuric acid is added to adjust the pH value to 2.5 and stirred at a speed of 100r / min until the brown solid is completely precipitated;
[0029] 5) Then vacuum filtration, dehydration and drying to obtain b...
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[0033] Example 2
[0034] 1) Add 100Kg of ammonium metavanadate to 300Kg of water, add ammonia water when heated to 90°C, add while stirring, until the ammonium metavanadate is completely dissolved;
[0035] 2) The same method as in Example 1 removes impurities contained in ammonium metavanadate;
[0036] 3) When the supernatant with impurities removed is heated to 90°C, add the oxidizer KClO to the solution 3 , Add while stirring to oxidize the divalent vanadium in the solution to pentavalent vanadium, KClO 3 The added amount is 1.8kg;
[0037] 4) The fully oxidized solution is heated to 90°C in the reactor, and sulfuric acid is added to adjust the pH value to 3 and stirred at a speed of 120r / min until the brown solid is completely precipitated;
[0038] 5) Then vacuum filtration, dehydration and drying to obtain brown powdery solid;
[0039] 6) Calcining the dried powdered solid in an oxidizing atmosphere at a temperature of 530°C for 2.5 hours.
[0040] All dissolution, separat...
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