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Method for preparing titania

A technology of titanium dioxide and titanium compounds, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of large titanium dioxide, difficult to prepare specific surface area, etc.

Inactive Publication Date: 2004-07-07
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with this traditional method, it is difficult to prepare titanium dioxide with a large specific surface area

Method used

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  • Method for preparing titania
  • Method for preparing titania
  • Method for preparing titania

Examples

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Embodiment 1

[0051] 3388 g of titanyl sulfate (manufactured by Tayca) was dissolved in 2258 g of ion-exchanged water to prepare a titanyl sulfate aqueous solution. Under ice-cooling, 1307 g of 35% aqueous hydrogen peroxide was added to the titanyl sulfate aqueous solution. In the obtained mixture, the molar amount of hydrogen peroxide is 1 time of the atomic weight of titanium in titanyl sulfate therein.

[0052] 4700 grams of ion-exchanged water was added to a reaction vessel equipped with several pH electrodes and a pH controller connected to the pH electrodes to provide 25% (by weight) Ammonia water (special grade, manufactured by Wako Pure Chemical Industry Co., Ltd.), thereby adjusting the pH value of the liquid in the reactor to be constant. The pH preset value of the pH controller is set to 4. The supply rate of ammonia water was set at 50.3 ml / min. When the pH value of the liquid in the reactor is less than a predetermined value, start to supply ammonia water, and continue to su...

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PUM

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Abstract

The present invention provides a method for producing a titanium oxide. The method can be applied to produce a titanium oxide having a large specific surface area. The method typically entails calcining at least one titanium oxide precursor selected from a titanium hydroxide and titanium peroxide, wherein the calcination occurs in the presence of nitrogen and at a steam pressure of at most about 8,000 Pa.

Description

technical field [0001] The present invention relates to a method for preparing titanium dioxide, more particularly, the present invention relates to a method for preparing titanium dioxide having a large specific surface area and being used as a catalyst. Background technique [0002] Titanium dioxide has been widely used as a catalyst. For example, titanium dioxide is used as a hydrogenation catalyst for the preparation of higher alcohols and as a catalyst support for the treatment of exhaust gases. Under such circumstances, the range of use of titanium dioxide has been expanded, and titanium dioxide having a high specific surface area has become a demand. [0003] It is known that titanium dioxide can be produced by hydrolyzing a titanium compound such as titanium sulfate and titanium chloride to obtain titanium hydroxide and calcining the titanium compound. However, with this conventional method, it is difficult to prepare titanium dioxide with a large specific surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08B01J21/06B01J35/02C01G23/04C01G23/053
CPCC01P2006/12C01G23/0532C01G23/04
Inventor 奥迫显仙
Owner SUMITOMO CHEM CO LTD