Recovering method for vanadium catalyst in pigment wastewater
A recovery method and catalyst technology, applied in chemical instruments and methods, water/sewage treatment, improvement of process efficiency, etc., can solve the problems of difficult recovery of vanadium, environmental pollution, waste, etc.
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[0028] Below in conjunction with specific embodiment the present invention is described in further detail:
[0029] The embodiment of the present application is used to treat inorganic ceramic pigment wastewater and recover the vanadium catalyst in it. The effluent meets the national discharge requirements and can be discharged directly, and the recovered vanadium can be reused in the production of ceramic pigments.
[0030] Embodiment 1~6 is the test that preparation simulates vanadium-containing waste water and carries out precipitation operation, and its process is:
[0031] Add 20 g of sodium metavanadate to 2 L of tap water, and add liquid caustic soda to adjust the pH to 12.18. The vanadium content is 3875mg / L, and it precipitates for 2 hours after adding the precipitating agent.
[0032] Table 1 is the test parameter involved in embodiment 1~6
[0033] Table 1 The test parameters involved in embodiments 1 to 6
[0034]
[0035] From the data in Table 1, it can be ...
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