Preparation method of titanium dioxide with high specific surface area
A high specific surface area, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of poor product quality, high production cost, environmental pollution, etc., and achieve the effect of preventing particle aggregation, preventing agglomeration, and high purity
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Embodiment 1
[0014] Example 1: Slowly add 3 mol of titanium tetrachloride to 1 L of deionized water to dissolve, control the dissolution to be stable below 60 ° C, and obtain a 3 mol / L titanium dioxychloride solution; under continuous stirring conditions, add to the above solution Add a mixture of polyvinyl alcohol, ethanolamine, citric acid and triol silane (1:2:1:2) with a total mass of 5‰ of the solution; when the temperature is gradually raised to 70°C, add 9mol / L liquid ammonia to the above solution; gradually After heating up to 90°C, keep it warm for 2 hours to obtain metatitanic acid gel, and obtain a metatitanic acid filter cake by pressure filtration; put the above filter cake into a calciner for calcining, control the calcining temperature to 750°C, and take it out after calcining for 2 hours , pulverized, and passed through a sieve of more than 60 mesh to obtain titanium dioxide powder; after adding the above powder into a ball mill for ball milling for 20 times, it was screened...
Embodiment 2
[0016] Example 2: Slowly add 3.2 mol of titanium tetrachloride to 1 L of deionized water for dissolution, and control the dissolution to stabilize below 60° C. to obtain a 3.2 mol / L titanium dioxychloride solution; Add a mixture of polyvinyl alcohol, ethanolamine, citric acid and triol silane (1:2:1:2) to the solution with a total mass of 6‰; when the temperature is gradually raised to 70°C, add 9.1mol / L liquid Ammonia; after gradually raising the temperature to 92°C, keep it warm for 3 hours to obtain metatitanic acid gel, and obtain a metatitanic acid filter cake by pressure filtration; add the above filter cake to a calciner for calcining, control the calcining temperature to 800°C, and calcined for 3 Take it out after 1 hour, crush it, and pass through a sieve of 60 mesh or more to obtain titanium dioxide powder; add the above powder into a ball mill for 20 times of ball milling, pass through a 80-mesh sieve, and put the powder that cannot pass through the sieve into the ba...
Embodiment 3
[0018] Example 3: Slowly add 3.5 mol of titanium tetrachloride into 1 L of deionized water for dissolution, and control the dissolution to stabilize below 60°C to obtain a 3.5 mol / L titanium dioxychloride solution; Add a mixture of polyvinyl alcohol, ethanolamine, citric acid and triol silane (1:2:1:2) with a total mass of 7‰ to the solution; when the temperature is gradually raised to 70°C, add 9.2mol / L liquid Ammonia; after gradually raising the temperature to 95°C, keep it warm for 4 hours to obtain metatitanic acid gel, and obtain a metatitanic acid filter cake by pressure filtration; add the above filter cake to a calciner for calcining, control the calcining temperature to 900°C, and calcined for 4 Take it out after 1 hour, crush it, and pass through a sieve of 60 mesh or more to obtain titanium dioxide powder; add the above powder into a ball mill for 20 times of ball milling, pass through a 80-mesh sieve, and put the powder that cannot pass through the sieve into the ba...
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