Film-coating production technology for nano zinc oxide
A nano-zinc oxide and production process technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, etc., can solve problems such as insufficient preparation methods, achieve stable nano-size and nano-material properties, mild and friendly reaction conditions, and grain development full effect
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[0067] Example 1
[0068] A planting film-type nano zinc oxide production process is characterized by including the following steps:
[0069] (1) Leaching: using ammonia and ammonium bicarbonate as the leaching solvent, leaching the zinc in the secondary zinc oxide into a zinc ammonia complex solution; this step
[0070] The main reaction formula is as follows:
[0071] ZnO+3NH 3 ·H 2 O+NH 4 HCO 3 =Zn(NH 3 ) 4 CO 3 +4H 2 O
[0072] The leaching is a two-stage type, which is carried out in two leaching tanks respectively. The filter residue after the first stage leaching is added to the second stage leaching tank under stirring and then leached, the second stage leaching filter residue is discarded, and the second stage The second leaching solution of the stage leaching is added to the first stage leaching tank as the leaching solvent, and the secondary zinc oxide is poured into the first leaching tank with stirring, the leaching first leaching solution enters the next step, and the cyc...
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