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Method of producing titania solution

A titanium dioxide solution technology, applied in the field of preparation of titanium dioxide solution, can solve problems such as difficulty in increasing productivity, low heat resistance, inability to perform sufficient roasting, etc., and achieve the effect of easy preparation

Inactive Publication Date: 2007-06-20
SUNDECOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there are some cases where sufficient firing cannot be performed with respect to a base material having low heat resistance, or a large amount of base material such as construction
Also, in order to prepare anatase-type titanium dioxide by heating a solution containing amorphous titanium dioxide as described in Patent Document 3, long-time heat treatment is required, so it is difficult to increase productivity

Method used

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  • Method of producing titania solution
  • Method of producing titania solution
  • Method of producing titania solution

Examples

Experimental program
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Effect test

Embodiment 1

[0065]In this example, an amorphous-containing solution was prepared using the method described above. At the beginning, TIP and IPA are mixed together in molar ratio TIP / IPA=1 / 5, then a liquid mixture of IPA and water is added to obtain a liquid mixture with molar ratio TIP / IPA / water=1 / 10 / 4. Subsequently, the liquid mixture was stirred while controlling its temperature at 25°C, so as to prepare titanium dioxide fine particles. Two, separate the titanium dioxide from the mother liquor by suction filtration, and then ventilate and dry at 100° C. to obtain titanium dioxide powder. The titanium dioxide powder was added together with a 31% by weight aqueous hydrogen peroxide solution, and then the solution was stirred while controlling 10° C. so as to obtain a titanium dioxide gel. After further adding a 31% by weight aqueous hydrogen peroxide solution, ammonia water was added to the solution so as to adjust the pH to 7. The thus-obtained solution containing amorphous titanium d...

Embodiment 2

[0073] In this example, titanium dioxide powder was dissolved in an aqueous hydrogen peroxide solution while controlling the solution at a predetermined temperature. This process is equivalent to step S4 in FIG. 1 . First, 1 gram of amorphous titanium dioxide powder was weighed per 100 ml sample bottle, and furthermore, a 15% by weight aqueous hydrogen peroxide solution was added. In this case, the temperatures of the solutions were controlled at 5°C, 10°C, 20°C, 30°C, and 40°C using a thermostat, respectively. Then, for each solution, the time (dissolution time) was calculated from the addition of the aqueous hydrogen peroxide solution until the titanium dioxide was dissolved. When the titanium dioxide powder was not visually observed, it was considered that the titanium dioxide was dissolved.

[0074] (result and discussion of embodiment 2)

[0075] The results of dissolution time at each temperature are shown in FIG. 5 . From this result, it is clear that it was 82 minu...

Embodiment 3

[0077] In this example, the titanium dioxide dispersion liquid was prepared using the above method of mixing water in excess relative to TIP. First, TIP, IPA, and water were mixed together at a molar ratio of TIP / IPA / water=1 / 5 / 10 to obtain a liquid mixture. Then, the liquid mixture was stirred while controlling its temperature at 25°C, so as to prepare titanium dioxide fine particles. Titanium dioxide was separated from the mother liquor by suction filtration, and then ventilated and dried at 100° C. to obtain titanium dioxide powder. The titanium dioxide powder was added together with a 31% by weight aqueous hydrogen peroxide solution, and then, while controlling 20° C., the solution was stirred so as to obtain a titanium dioxide dispersion liquid. This dispersion liquid is referred to as solution A.

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Abstract

Titania is dissolved in a hydrogen peroxide solution to produce an amorphous titania gel, then the amorphous titania gel and a hydrogen peroxide solution are mixed together to produce an amorphous titania sol, and then an alkali solution is supplied to the solution containing the amorphous titania sol to thereby adjust a pH of the solution to 2 to 10. Even if the obtained solution containing amorphous titania is, for example, left to stand at normal temperature for a long time, gelling or aggregation of titania can be suppressed. That is, it is possible to obtain a titania solution that can maintain the state where fine particles of titania are highly dispersed in the solution, over a long term.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of June 15, 2004, an application number of 200410068453.4, and an invention title of "Method for Preparing Titanium Dioxide Solution". technical field [0002] The present invention relates to a method for preparing a titanium dioxide solution containing amorphous titanium dioxide and / or crystalline titanium dioxide, which is used, for example, as a raw material for a coating exhibiting photocatalytic activity. Background of the invention [0003] Titanium dioxide, that is, titanium dioxide (TiO 2 ), which exhibit photocatalytic activity when irradiated with light or the like, and have been used as raw materials for forming coatings on the surfaces of various base materials such as ceramics, pottery, metals, fibers, resins, and building materials, with It protects the surface of the base material and prevents the base material from getting dirty through its excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 中野胜之东英子早川武
Owner SUNDECOR
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