Preparation of high pure gold redrock nano-titanium dioxide

A technology of nano-titanium dioxide and rutile, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of low crystallization temperature, long reaction time, co-precipitation of metal impurities, etc., achieve high efficiency, shorten heating time, and reaction time short effect

Inactive Publication Date: 2009-06-03
雷亚林
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Problems solved by technology

[0002] Since many high-tech fields have very strict requirements on the impurity content of nano-rutile titanium dioxide, especially iron impurities, especially in the fields of liquid crystal material preparation, precision sensors, aerospace, aerospace coatings, etc., thus putting forward very high requirements for the preparation of high-purity rutile nanomaterials, Due to the large specific surface area of ​​nanomaterials, the electrostatic adsorption of metal ions on the surface of nanoparticles is very strong. Usually, high-temperature gas-phase methods and liquid-phase methods are not well resolved. Although there are many reports in the literature on liquid-phase synthesis of rutile nano-titanium oxide, see Patent Publication Nos.

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  • Preparation of high pure gold redrock nano-titanium dioxide

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[0017] Example: 1: Add 0.5mol / L titanium tetrachloride directly into the aqueous solution containing additives and 0.05mol hydroxylamine hydrochloride, add 0.1mol / L tetraethyl titanate to dissolve, heat for 2.5 hours and cool. The sol particles are completely rutile-type nano-titanium dioxide by XRD test. The dispersion liquid is washed, dechlorinated, concentrated and dried to obtain powder. The tested particle size is about 5nm, and the iron content is less than 5ppm.

[0018] Example: 2: Add 0.5mol / L tetraethyl titanate directly to an example aqueous solution, add 0.005mol / L hydrazine hydrate, add concentrated hydrochloric acid to dissolve until the solution is transparent, heat reaction, boil for 1.5 hours, cool, wash and dry the powder. XRD test is single rutile nano titanium dioxide, particle size is 3-7nm, after 700 sintering, 0.5-1 hour, the test particle size is 20-30nm, and the test iron content is 3-5ppm. The XRD test was completely rutile.

[0019] Example: Three...

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Abstract

The invention discloses a preparation method for composing the high pure gold redrock nano-titanium dioxide by employing titanium tetrachloride and metal titanium alkoxide salt or a mixture thereof as materials by one step. The invention is characterized in that the product is single redrock nano-titanium dioxide with iron content less than 10ppm and controllable iron content of 3 to 5ppm; the grain diameter of the product after being treated at 700 DEG C is large, but smaller than 50nm; the dispersivity is good when the diameter is of 20 to 30nm; the effective content of treatment under 900 DEG C is more than 99.9 percent, and can achieve 99.99 to 99.999 percent(calculated by metal impurity content); the product can be used as a target material and a high shielding ultraviolet ray absorbent, and has excellent optical performances on infrared rays. The invention is broadly applied to liquid crystal material manufacture, the production of spaceflight and navigation coatings and precision sensor piece, cosmetics, high-grade vehicle dope manufacture, and the like.

Description

technical field [0001] The invention relates to the preparation of high-purity rutile nano-titanium dioxide synthesized by one-step method, whose iron content is less than 10ppm, which can be controlled at 3-5ppm, or even lower than 3ppm, and belongs to the field of fine chemical new functional material manufacturing. Background technique [0002] Since many high-tech fields have very strict requirements on the impurity content of nano-rutile titanium dioxide, especially iron impurities, especially in the fields of liquid crystal material preparation, precision sensors, aerospace, aerospace coatings, etc., thus putting forward very high requirements for the preparation of high-purity rutile nanomaterials, Due to the large specific surface area of ​​nanomaterials, the electrostatic adsorption of metal ions on the surface of nanoparticles is very strong. Usually, high-temperature gas-phase methods and liquid-phase methods are not well resolved. Although there are many reports i...

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Application Information

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IPC IPC(8): C01G23/053
Inventor 雷亚林
Owner 雷亚林
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