Method for preparing rutile titanium dioxide with high tinctorial strength
A rutile titanium dioxide and achromatic technology, applied in chemical instruments and methods, titanium dioxide, titanium compounds, etc., can solve the problems of easy agglomeration and poor achromatic power of titanium dioxide, achieve uniform particle size distribution, improve gloss and whiteness , the effect of improving the purity
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Embodiment 1
[0029] A method for preparing high decolorizing power rutile titanium dioxide, comprising the steps of:
[0030] (1) Add 2 times concentrated sulfuric acid to titanium concentrate for acid hydrolysis to obtain titanium suspension, add maleic anhydride-styrene sulfonic acid copolymer and lignin with a mass ratio of 3:2:1 to the titanium suspension The flocculant composed of sodium sulfonate and polyaluminum chloride is used for impurity removal treatment. The amount of flocculant added is 1.5% of the mass of titanium concentrate, and it is left to stand for 24 hours. An adsorbent with 1.0% concentrate quality, the adsorbent is composed of diatomite and zeolite molecular sieve with a mass ratio of 1:1, press-filtered for solid-liquid separation, the liquid after press-filtering enters the vacuum crystallization system, passes through the disc The separator removes ferrous sulfate heptahydrate, and then adds an adsorbent with 0.5% of titanium concentrate mass for secondary pressu...
Embodiment 2
[0035] A method for preparing high decolorizing power rutile titanium dioxide, comprising the steps of:
[0036] (1) Add 1.6 times concentrated sulfuric acid to titanium concentrate for acid hydrolysis to obtain titanium suspension, add maleic anhydride-styrene sulfonic acid copolymer and lignin with a mass ratio of 5:2:1 to the titanium suspension The flocculant composed of sodium sulfonate and polyaluminum chloride is used for impurity removal treatment. The amount of flocculant added is 1.8% of the mass of titanium concentrate, and it is left to stand for 12 hours. An adsorbent with 0.5% concentrate quality, the adsorbent is composed of diatomite and zeolite molecular sieve with a mass ratio of 1:2, press-filtered for solid-liquid separation, the liquid after press-filtering enters the vacuum crystallization system, passes through the disc The separator removes ferrous sulfate heptahydrate, and then adds an adsorbent with 0.5% of titanium concentrate mass for secondary pres...
Embodiment 3
[0041] A method for preparing high decolorizing power rutile titanium dioxide, comprising the steps of:
[0042] (1) Add 2 times concentrated sulfuric acid to titanium concentrate for acid hydrolysis to obtain titanium suspension, add maleic anhydride-styrene sulfonic acid copolymer, lignin with a mass ratio of 3:1:1 to the titanium suspension The flocculant composed of sodium sulfonate and polyaluminum chloride is used for impurity removal treatment. The amount of flocculant added is 1.0% of the mass of titanium concentrate. After standing for 24 hours, the upper half of the clear liquid is taken out and sent to the first-stage filter, and titanium An adsorbent with 1.0% concentrate quality, the adsorbent is composed of diatomite and zeolite molecular sieve with a mass ratio of 1:1, press-filtered for solid-liquid separation, the liquid after press-filtering enters the vacuum crystallization system, passes through the disc The separator removes ferrous sulfate heptahydrate, a...
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