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A titanium-containing aluminum hydroxide and preparation method thereof

A technology of aluminum hydroxide and aluminum oxide, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as inflexibility of co-precipitation method, application limitations, and environmental pollution, so as to weaken competition, The preparation method is simple and the effect of high activity

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

Simply put, the conditions of co-precipitation are sometimes not the optimal precipitation conditions for the two substances, thus causing the inflexibility of the co-precipitation method, and thus the application is limited
[0004] CN1289636A discloses a method for preparing titanium-containing aluminum hydroxide by precipitating titanium salt in aluminum hydroxide slurry, which can prepare well-dispersed titanium-containing aluminum hydroxide, but because the titanium salt solution contains Cl - and SO 4 2- Plasma, corrosion equipment, and roasting into γ-Al in aluminum hydroxide 2 o 3 Gases such as chlorine and sulfur dioxide will be produced to pollute the environment; for this reason CN 1324687A has announced a carbonization method to add fine metatitanic acid, TiO 2 The method for preparing titanium-containing aluminum hydroxide reduces environmental pollution, but the end of gelation is only one aging, the pore volume and specific surface of titanium-containing aluminum oxide are low, and the use is limited; CN 03133554.3 discloses a method for preparing pore volume and specific surface The titanium-containing aluminum hydroxide method with a large surface area, but it uses ultrasonic waves in the aluminum hydroxide gelation process, and its use is limited due to the need for special equipment and possible noise pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The concentration is 30g Al 2 o 3 500mL of sodium metaaluminate solution per liter is placed in the gelling tank, the gelling temperature is controlled at 25°C, carbon dioxide gas with a concentration of 40v% is introduced, and the concentration of slurry is 20g TiO 2 / l metatitanic acid slurry (pH value is 8.0, particle size is less than 40μm), so that the carrier contains TiO 2 It is 10% by weight, continue to pass carbon dioxide gas until the pH value of the slurry is 10, stop passing carbon dioxide gas, age the slurry for 1.0 hour, filter, put the filter cake back into the gel tank, add 500mL deionization temperature at 75°C Water, control the temperature at 75°C, and age for 1.0 hour. Then filter and wash with deionized water until the carrier contains Na + When <0.05w% by weight, dry (120° C.) for 4 hours, and then crush to 180 mesh to obtain product A of the present invention.

Embodiment 2

[0023] Compared with Example 1, the secondary aging temperature is controlled at 85° C., and the amount of other materials and operating conditions are the same as in Example 1, that is, product B in the cost example.

Embodiment 3

[0025] Compared with Example 1, the secondary aging temperature is controlled at 95° C., and the amount of other materials and operating conditions are the same as in Example 1, that is, product C in the cost example.

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Abstract

The invention relates to a method for preparing aluminum hydroxide with titanium. Wherein, it leads titanium into aluminum hydroxide paste process, to confirm the uniform disperse of titanium on the surface of aluminum hydroxide; and it uses secondary aging process to make the hole capacity of aluminum hydroxide particles larger than specific surface area. The invention can be used as catalyst carrier and hydrogen catalyst, with better physical property and application property.

Description

technical field [0001] The invention relates to a titanium-containing aluminum hydroxide and a preparation method thereof, in particular to a titanium-containing aluminum hydroxide in which titanium is uniformly distributed on the surface of aluminum hydroxide and the product has larger pore volume and specific surface area after roasting and a preparation method thereof . 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. Therefore, it is a great challenge for researchers to develop more active and selective residue hydrotreating catalysts. The means to develop catalysts with higher activity and selectivity is usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/02B01J37/00B01J37/04C10G45/04
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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