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Titanium-containing aluminium hydrate and preparing method thereof

A technology of aluminum hydroxide and aluminum oxide, which is applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc. Flexibility, titanium distribution will not be uniform, etc., to achieve uniform properties, weaken competition, and uniform distribution

Inactive Publication Date: 2005-12-07
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] CN 1289636A 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 Although the method for preparing titanium-containing aluminum hydroxide reduces environmental pollution, aggregates will be produced when the sodium metaaluminate solution reacts with carbon dioxide to form a gel due to the addition of solid particles (although its particle size is less than 65 μm), which affects the quality of aluminum hydroxide. Particle size, and the distribution of titanium in aluminum hydroxide will not be uniform, which will lead to a decrease in its performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The concentration is 30g Al 2 o 3 500mL of sodium metaaluminate solution per liter is placed in the ultrasonic transducer, the ultrasonic transducer is controlled to transmit power to 200W, the frequency is 25kHz, the temperature is 25°C, and carbon dioxide gas with a concentration of 40v% is introduced into it, and it is added under constant stirring. 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, and the carbon dioxide gas is continuously fed until the pH value of the slurry is 10, the carbon dioxide gas is stopped, the slurry is aged for 1.0 hour, and the ultrasonic transducer is turned off. 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

[0021] Compared with Example 1, the transmission power of the ultrasonic transducer is changed to 50W and the frequency is 80kHz, and the amount of other materials and operating conditions are the same as in Example 1, namely the product B of this example.

Embodiment 3

[0023] Compared with Example 1, the transmitting power of the ultrasonic transducer is changed to 800W and the frequency is 50kHz, and the amount of other materials and operating conditions are the same as in Example 1, namely Product C of this example.

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PUM

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Abstract

A Ti-contained aluminium hydroxide particle used as catalyst carrier or hydrocatalyst is prepared from aluminium hydroxide particle through uniformly dispersing the Ti particles on the surface of aluminium hydroxide particle by ultrasonic method. Its advantages are fine particle, and large pore volume and specific surface area.

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 Patents(China)
IPC IPC(8): B01J21/06B01J23/06B01J23/85B01J37/04
Inventor 蒋绍洋王纲王永林孙素华陈金汤
Owner CHINA PETROLEUM & CHEM CORP