Preparation method for treating titanium white by high zinc salt
A technology of salt treatment and titanium dioxide, which is applied in the field of preparation of high-zinc salt treatment titanium dioxide, to achieve the effect of improving conversion rate, crystal form stability and good whiteness
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Embodiment 1
[0030] (1) Get the metatitanic acid that has been added with rutile calcined seed crystals after bleaching and rinsed to make slurry with deionized water, and the slurry concentration is 450g / l of titanium dioxide content;
[0031] (2) Potassium hydroxide is added, and its addition is calculated as 0.25% of the titanium dioxide content in terms of potassium oxide;
[0032] (3) adding phosphoric acid, its addition is calculated as 0.30% of titanium dioxide content with phosphorus pentoxide;
[0033] (4) Adding zinc oxide, its addition is calculated as 0.60% of the titanium dioxide content based on zinc oxide;
[0034] (5) Stir at 60 rpm for more than one hour, and filter the slurry.
[0035] (6) Calcining the filter cake at 925° C. for one hour, dehydration, desulfurization, crystal transformation, and grain growth until the rutile crystal transformation rate reaches over 99%.
Embodiment 2
[0037] (1) Get the metatitanic acid that has been added with rutile calcined seed crystals after bleaching and rinsed to make slurry with deionized water, and the slurry concentration is 450g / l of titanium dioxide content;
[0038] (2) Potassium hydroxide is added, and its addition is calculated as 0.50% of the titanium dioxide content in terms of potassium oxide;
[0039] (3) adding phosphoric acid, its addition is calculated as 0.40% of titanium dioxide content with phosphorus pentoxide;
[0040] (4) adding zinc oxide, the amount of which is calculated as 1.0% of the titanium dioxide content based on zinc oxide;
[0041] (5) Stir at 60 rpm for more than one hour, and filter the slurry.
[0042] (6) Calcining the filter cake at 950° C. for one hour, dehydration, desulfurization, crystal transformation, and grain growth until the rutile crystal transformation rate reaches over 99%.
Embodiment 3
[0044] (1) Get the metatitanic acid that has been added with rutile calcined seed crystals after bleaching and rinsed to make slurry with deionized water, and the slurry concentration is 450g / l of titanium dioxide content;
[0045] (2) Potassium hydroxide is added, and its addition is calculated as 0.25% of the titanium dioxide content in terms of potassium oxide;
[0046] (3) adding phosphoric acid, its addition is calculated as 0.30% of titanium dioxide content with phosphorus pentoxide;
[0047] (4) Adding zinc oxide, its addition is calculated as 1.3% of the titanium dioxide content with zinc oxide;
[0048] (5) Stir at 60 rpm for more than one hour, and filter the slurry.
[0049] (6) Calcining the filter cake at 925° C. for one hour, dehydration, desulfurization, crystal transformation, and grain growth until the rutile crystal transformation rate reaches over 99%.
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