Method for producing high purity battery level iron oxalate from pickle liquor
A technology for ferrous oxalate and pickling waste liquid, applied in the preparation of carboxylate, organic chemistry, etc., can solve the problems of waste of manpower and material resources, low content, environmental pollution, etc., and achieves improved reaction rate, high purity of finished products, and sufficient reaction. Effect
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Embodiment 1
[0029] Embodiment 1, the production method of ferrous oxalate:
[0030] (a), first add iron sheet or iron filings in the reaction tank, pour pickling waste liquid into, it is heated to 93 ℃, obtain ferrous salt solution, control the remaining acid amount=0.9% after its reaction, PH= 4; Ferrous salt solution includes ferrous sulfate, ferrous nitrate and ferrous oxide; the concentration of ferrous salt solution is 180mg / l
[0031] (b), the ferrous salt solution is passed through a group of Y-shaped filters to filter its metal impurities and non-metallic impurities, remove iron filings, and make it obtain a pure ferrous salt solution;
[0032] (c), add pure ferrous salt solution in the 2000L reactor with stirring, add industrial ammonia and stir the aqueous solution to make it react to generate ferrous hydroxide gel, and control the pH value=6.8 after adding ammonia, and the temperature is 72°C;
[0033] (d), in the dissolving reactor, dissolve oxidized oxalic acid to make oxal...
Embodiment 2
[0037] Embodiment 2, the production method of ferrous oxalate:
[0038] (a), first add iron flakes or iron filings in the reaction tank, pour pickling waste liquid into, it is heated to 93 ℃, obtain ferrous salt solution, control the remaining acid amount=0.8% after its reaction, PH= 5; Ferrous salt solution includes ferrous sulfate, ferrous nitrate and ferrous oxide; the concentration of ferrous salt solution is 200mg / l
[0039] (b), the ferrous salt solution is passed through a group of precision filter and magnetic filter, filter its metallic impurities and non-metallic impurities, remove iron filings, make it obtain pure ferrous salt solution;
[0040] (c), add pure ferrous salt solution in 2000L reactor with stirring, add industrial ammonia and stir the aqueous solution to make it react to generate ferrous hydroxide gel, and control the pH value=6.9 after adding ammonia, and the temperature is 78°C;
[0041] (d), in the dissolution reactor, dissolve the oxidized oxalic ...
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