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Titanium-containing aluminium hydroxide preparation method

A technology of aluminum hydroxide and carbon dioxide, which is applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of strong acidity of titanium tetrachloride solution and titanium distribution Impact, alumina structure damage and other issues

Active Publication Date: 2007-04-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that due to the strong acidity of titanium tetrachloride solution, it has a certain destructive effect on the structure of alumina.
The titanium-containing aluminum hydroxide obtained by this method has a relatively uniform distribution of titanium, but due to the addition of solid particles (although its particle size is less than 65 μm), aggregates will be produced when the sodium metaaluminate solution reacts with carbon dioxide to form a gel, which affects the aluminum hydroxide. particle size, and the distribution of titanium in aluminum hydroxide is also affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation concentration is 30gAl 2 o 3 / l, sodium metaaluminate solution with an atomic ratio of Na to Al of 1.4. Take a certain amount of sodium metaaluminate solution and place it in the gelling kettle, adjust the pH value to 14, and the temperature is 25°C, start to feed carbon dioxide gas with a concentration of 40v%, and add the pH value under stirring while passing carbon dioxide For the titanium trichloride solution of 2, when the pH value becomes 6.5, add sodium metaaluminate solution to make the pH value become 10.5, and stir for 5-10 minutes; repeat the above steps once, and then when the pH value of the slurry is 10.5 When the carbon dioxide gas is stopped. The slurry was aged for 1.0 hour. Filter and wash with deionized water until the aluminum hydroxide contains Na + When <0.05wt% by weight, dry (120° C.) for 4 hours, and then crush to 180 mesh to obtain the product A of the present invention.

Embodiment 2

[0027] Compared with Example 1, the sodium metaaluminate solution concentration is changed to 20gAl 2 o 3 / l, other material consumption and operating conditions are identical with embodiment 1, namely cost example product B.

Embodiment 3

[0029] Compared with Example 1, the atomic ratio of Na to Al in the sodium metaaluminate solution was changed to 1.6, and the amount of other materials and operating conditions were the same as in Example 1, that is, product C of this example.

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PUM

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Abstract

The invention discloses a making method of titanium aluminium hydroxide, which is characterized by the following: introducing adjuvant titanium in the gelling course of aluminium hydroxide through shaking pH value reciprocally; dispersing titanium evenly on the surface of aluminium hydroxide; enlarging the most probable aperture of titanium aluminium hydroxide.

Description

technical field [0001] The invention relates to a preparation method of titanium-containing aluminum hydroxide. Background technique [0002] In recent years, the hydrotreating process of residual oil has been paid attention to by people. With the need for deep processing of residual oil and the higher and higher requirements for environmental protection, more extensive and in-depth research must be carried out on catalysts for residual oil hydrotreating in order to continuously develop new catalysts to meet actual needs. [0003] The introduction of titanium as a promoter in the catalyst can effectively improve the performance of the catalyst, so many heavy and residual oil hydrogenation catalysts contain titanium as a promoter, but the different ways of introducing titanium have a certain impact on the catalyst preparation cost and catalyst performance. There are many ways to introduce titanium into the catalyst or catalyst raw material alumina, and the selected titanium-...

Claims

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Application Information

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IPC IPC(8): C01F7/14B01J21/06B01J37/02
Inventor 蒋绍洋隋宝宽安晟赵愉生吴国林陈金汤
Owner CHINA PETROLEUM & CHEM CORP
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