Method for preparing anatase type nano-titanium dioxide

A nano-titanium dioxide, anatase-type technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of complex process flow, limit the large-scale application of nano-titanium dioxide products, and high manufacturing cost, and achieve simple process, low cost, Production cost reduction effect

Inactive Publication Date: 2008-12-10
四川华铁钒钛科技股份有限公司
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  • Claims
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Problems solved by technology

[0004] The preparation technology of above-mentioned nano-titanium dioxide can be summarized into two major types of process technologies, five typical preparation technologies (see Table 1), all preparation processes and manufacturing technologies have the disadvantages of complex process flow and high manufacturing cost. High will also limit the mass application of nano-titanium dioxide products

Method used

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  • Method for preparing anatase type nano-titanium dioxide
  • Method for preparing anatase type nano-titanium dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Weigh 10Kg metatitanic acid (by TiO 2 meter), add it into the reactor with a stirring device, add a certain amount of deionized water, and adjust the concentration of the slurry to 10-15wt%; after stirring evenly, slowly add the relative TiO 2 5.0wt% NaOH solution, adjust the pH value of the slurry to about 8-9; filter and wash after fully stirring, and use BaCl 2 Solution detects sulfate ion in the filtrate; The filter cake that washs clean is beating once more, and adjusting slurry concentration is 15~25wt%; In slurry, add 0.1wt% (relative to TiO 2 ) cationic polyacrylamide, and add 3.0wt% (relative to TiO 2 ) of polyethylene glycol 4000; after stirring evenly, the slurry was left to stand for 20 minutes and then filtered; the filter cake was dried at 120°C, and the dried filter cake was calcined at 200°C to 500°C for 4 hours, wherein 200°C to 350°C for 2.0 hours, 350°C to 400°C for 1.0 hour, 400°C to 500°C for 1.0 hour, crush the calcined material to prepare a powd...

Embodiment 2

[0032] Weigh 10Kg metatitanic acid (by TiO 2 Add a certain amount of deionized water to the reactor with a stirring device to adjust the slurry concentration to 20-28wt%; after stirring evenly, slowly add 10.0-12.0wt% (relative to TiO 2 ) of Ba(NO 3 ) 2;After fully stirring and reacting for 30 minutes, the solution becomes a highly dispersed nano-particle size slurry; slowly add 10.0wt% ammonium carbonate solution to the slurry, adjust the pH value of the slurry to about 5-7, and gel the slurry; add 3.0wt% % (relative to TiO 2 ) of polyethylene glycol 2000; after stirring evenly, the slurry was allowed to stand for 30 minutes and then filtered; the filter cake was dried at 120°C, and the dried filter cake was calcined at 200°C to 530°C for 4 hours, wherein 200°C to 350°C for 2.0 hours, 350°C to 400°C for 1.0 hour, 400°C to 530°C for 1.0 hour, pulverize the calcined material to prepare a powdered nano-titanium dioxide product. X-ray diffraction method determines that the pro...

Embodiment 3

[0034] Weigh 10Kg metatitanic acid (by TiO 2 ) into the reactor with stirring device, add a certain amount of deionized water, adjust the slurry concentration to 20-25wt%; after stirring evenly, slowly add 5.0wt% NaOH solution to the slurry to adjust the pH value of the slurry About 6~7; after fully stirring, filter and wash, use BaCl 2 The solution detects the sulfate ion in the filtrate; the filter cake after washing is beaten again, and the concentration of the slurry is adjusted to be 15-25wt%; the ammonium carbonate solution of 10.0wt% is slowly added to the slurry, and the pH value of the slurry is adjusted to be about 5-6. Gel; and add 3.0wt% (relative to TiO 2 ) water-soluble silicone oil such as JT-708; after stirring evenly, let the slurry stand for 20 minutes and then filter; dry the filter cake at 120°C, and calcinate the dried filter cake at 200°C to 600°C for 4.5 hours, of which 200 ℃~350℃ for 2.0 hours, 350℃~400℃ for 1.0 hours, 400℃~600℃ for 1.5 hours, pulveri...

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Abstract

The invention relates to a method for preparing anatase nano titania, which relates to the chemical product preparation technical field. The method adopts a metatitanic acid produced by the sulfuric acid method as a raw material; depolymerizing agents are added into the metatitanic acid and reacted with a sulfuric acid in the metatitanic acid so as to depolymerize the metatitanic acid; micron secondary agglomerated particles of the metatitanic acid are depolymerized into nano primary positive particles; and anatase nano titania products are prepared with low cost after subsequent procedure treatments of gel coagulation, filtration, washing, calcination, crushing and so on of the processed metatitanic acid. The method has a simple technique and the anatase nano titania is high in purity; and the three wastes are small in amount and convenient to recover, and no emission of waste gas and liquor can be reached completely, thereby the complete environment-friendly industrial standard can be realized. Moreover, the method can manyfold reduce the manufacturing cost of the nano titania products, thereby having great promotion value and wide market prospect.

Description

technical field [0001] The invention relates to the technical field of chemical product preparation, in particular to a method for preparing anatase nano-titanium dioxide by using metatitanic acid as a raw material. Background technique [0002] After the nanoscale crystallization of titanium dioxide, due to its specific structure, nano-titanium dioxide has special properties such as quantum size effect and surface effect that bulk materials do not have, and thus produces a series of special physical and photochemical properties. Nano-TiO 2 Due to its characteristics, it can be widely used in the fields of machinery, electronics, optics, magnetism, chemistry and biology. [0003] At present, the nano-titanium dioxide preparation process can be divided into gas phase method and liquid phase method, and the raw materials mainly include: metatitanic acid, TiCl 4 , organic titanium, etc. A lot of development has been done on nano-titanium dioxide preparation technology at hom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08
Inventor 李建彬鲁东胡新平
Owner 四川华铁钒钛科技股份有限公司
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