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Production method for liquid dispersion of titanium oxide particles

A manufacturing method and technology of titanium oxide, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as impaired transparency of alcohol dispersions

Active Publication Date: 2017-10-13
SAKAI CHEM IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the method for obtaining the above-mentioned alcohol dispersion of titanium oxide particles, the titanium oxide particles in the water slurry are degummed with acid to obtain an aqueous dispersion of titanium oxide particles, and the dispersion medium of the aqueous dispersion is replaced When forming an alcohol, there is a problem that, depending on the type of acid used as the above-mentioned debonding agent, the titanium oxide particles are aggregated and enlarged, and the transparency of the obtained alcohol dispersion is significantly impaired.

Method used

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Examples

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Embodiment

[0062] Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited to these Examples at all.

[0063] Hereinafter, "Microza" manufactured by Asahi Kasei Chemical Co., Ltd. (model: ACP-1010D, fractional molecular weight: 13000) was used for ultrafiltration. The dispersion diameter of the titanium oxide particles in the dispersion liquid was measured by a dynamic light scattering method (UPA-UT manufactured by Nikkiso Co., Ltd.).

[0064] Regarding the total light transmittance of the dispersion liquid of titanium oxide particles, using a haze meter (NDH4000 manufactured by Nippon Denshoku Industries Co., Ltd.), ion-exchanged water was filled into a cuvette with an optical path length of 10 mm, and the light transmittance was measured ( blank value) T 0 , similarly fill the cuvette with dispersion liquid and measure the light transmittance T, with (T / T 0 )×100 to find out.

[0065] Viscosity was measured with a tuning-fork...

reference example 1

[0068] (Adjustment of aqueous slurry A of rutile-type titanium oxide particles)

[0069] Into a separable flask equipped with a reflux device, 3 L of an aqueous solution of titanium tetrachloride adjusted so that the concentration of chloride ions is 2.3 mol / L and the concentration of titanium ions is 50.7 g / L in terms of titanium oxide is charged at 70° C. It heated for 3 hours and hydrolyzed to obtain an aqueous slurry containing the precipitated rutile-type titanium oxide particles. (first process)

[0070] Use glass fiber filter paper with a collection diameter of 300 nm to filter the above water slurry to remove unreacted titanium tetrachloride and dissolved components. The titanium oxide particles obtained in this way were slurried twice in water, and an aqueous sodium hydroxide solution was added to the obtained water slurry until the pH of the above water slurry reached 7.0. Filtration and washing with fiber filter paper. At this time, when the rutile-type titanium ...

Embodiment 1

[0074] To the aqueous slurry A of rutile-type titanium oxide particles obtained in Reference Example 1, 152 molar parts of acetic acid and 52 molar parts of nitric acid were added relative to 100 molar parts of titanium oxide to perform degumming, and then water was added to make the slurry The material is diluted in such a way that it reaches 50g / L in terms of titanium oxide.

[0075] 2L of the aqueous slurry thus obtained was subjected to a wet dispersion treatment for 18 hours using a circulation type bead mill "Ultra Apecks Mill UAM-05" manufactured by Kotobuki Kogyo Co., Ltd. to obtain an aqueous dispersion of rutile-type titanium oxide particles. . In the above-mentioned wet dispersion treatment, zirconia beads with a diameter of 30 μm were used, and the rotational speed of the bead mill was set at 2940 rpm.

[0076] Concentrate the aqueous dispersion of the rutile-type titanium oxide particles until the content of the rutile-type titanium oxide particles reaches 15% by...

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Abstract

The present invention provides a production method for an aqueous dispersion of titanium oxide particles, the production method comprising: a first step (a) in which an aqueous slurry of titanium oxide particles is subjected to wet dispersion in a stirred media mill or a high-pressure dispersion device and in the presence of 15-250 mol parts of acetic acid and 15-90 mol parts of nitric acid with respect to 100 mol parts of titanium oxide, and a pre-washing aqueous dispersion of titanium oxide particles is obtained; and a second step (b) in which the pre-washing aqueous dispersion of titanium oxide particles obtained in the first step (a) is washed. The present invention further provides a production method for a liquid dispersion of titanium oxide particles in alcohol, the production method comprising a third step (c) in which the carrier fluid of the aqueous dispersion of titanium oxide particles obtained in the second step (b) is replaced with an alcohol solvent.

Description

technical field [0001] The present invention relates to a method for producing an aqueous dispersion of titanium oxide particles and an alcohol dispersion, and more specifically, to a method for producing an aqueous dispersion of titanium oxide particles capable of imparting an alcohol dispersion that substantially maintains dispersion in water The dispersion diameter of the titanium oxide particles contained in the liquid and the transparency of the dispersion, and involves using the aqueous dispersion of titanium oxide particles as a starting material, replacing the dispersion medium in the aqueous dispersion of titanium oxide particles with alcohol, and a method for producing an alcohol dispersion that substantially maintains the dispersion diameter and transparency of the titanium oxide particles in the aqueous dispersion of the titanium oxide particles. [0002] Furthermore, the present invention relates to an aqueous dispersion and an alcohol dispersion of titanium oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C09D17/00
CPCC01G23/047C01G23/0536B82Y40/00C09D17/008C01P2004/64C01P2006/22C01G23/08C01G23/001C01P2004/51C01P2006/40C09D17/00C09D17/001
Inventor 森田考则
Owner SAKAI CHEM IND CO LTD
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