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A kind of titanium-containing alumina dry rubber powder and preparation method thereof

A titanium-alumina and aluminum-alumina technology, which is applied to the titanium-alumina dry rubber powder of a hydrotreating catalyst carrier and its preparation field, can solve the problems of restricting industrial applications, equipment corrosion, and polluting gases, etc. Improved synergy, improved reactivity, and excellent properties

Active Publication Date: 2019-09-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] CN 1289636A discloses a method for preparing titanium-containing aluminum hydroxide by precipitating titanium salt in aluminum hydroxide slurry. Because the titanium salt solution contains chloride ions and sulfate ions, it is easy to cause corrosion to the equipment, and it will cause corrosion during the roasting process. Produces gases that pollute the environment, limiting industrial applications

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  • A kind of titanium-containing alumina dry rubber powder and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] (1) Prepare a mixed slurry of nano-titanium dioxide and ammonium citrate, the mass content of nano-titanium dioxide in the mixed slurry is 10%, the mass content of ammonium citrate is 0.8%, and the particle size of the nano-titanium dioxide is 10nm;

[0025] (2) Prepare a sodium aluminate solution with a concentration of 30g / L and an aluminum sulfate solution with a concentration of 40g / L, and add them concurrently to the neutralization reaction device under stirring conditions, and control the pH value to 8.2 and the temperature to 58°C , the neutralization time is 55min to obtain a solution containing aluminum hydroxide sol, the mass concentration of aluminum hydroxide in the solution containing aluminum hydroxide sol is 5 g / 100mL calculated as alumina, and the mixed solution prepared in step (1) is added after aging for 10min Continue aging, the amount of mixed solution prepared in step (1) is based on the mass content of nano-titanium dioxide in the final catalyst as...

Embodiment 2

[0028] (1) Prepare a mixed slurry of nano-titanium dioxide and ammonium citrate, the mass content of nano-titanium dioxide in the mixed slurry is 15%, the mass content of ammonium citrate is 1.5%, and the particle size of the nano-titanium dioxide is 60nm;

[0029] (2) Prepare a sodium aluminate solution with a concentration of 30g / L and an aluminum sulfate solution with a concentration of 40g / L, and add them to the neutralization reaction device at the same time under stirring conditions, control the pH value to 8.0, and the temperature to 62°C , the neutralization time is 35min to obtain a solution containing aluminum hydroxide sol, the mass concentration of aluminum hydroxide in the solution containing aluminum hydroxide sol is 10g / 100mL in terms of alumina, after aging for 30min, add the mixed solution prepared in step (1) to continue For aging, the amount of the mixed solution prepared in step (1) is based on the mass content of nano-titanium dioxide in the final catalyst ...

Embodiment 3

[0032] (1) preparing a mixed slurry of nano-titanium dioxide and ammonium citrate, the mass content of nano-titanium dioxide in the mixed slurry is 20%, the mass content of ammonium citrate is 2%, and the particle size of the nano-titanium dioxide is 60nm;

[0033](2) Prepare a sodium aluminate solution with a concentration of 30g / L and an aluminum sulfate solution with a concentration of 40g / L, and add them to the neutralization reaction device at the same time under stirring conditions, control the pH value to 8.0, and the temperature to 60°C , the neutralization time is 55min to obtain a solution containing aluminum hydroxide sol, the mass concentration of aluminum hydroxide in the solution containing aluminum hydroxide sol is 10 g / 100mL calculated as alumina, and the mixed solution prepared in step (1) is added after aging for 30min Continue aging, the amount of the mixed solution prepared in step (1) is 4% based on the mass content of nano-titanium dioxide in the final cat...

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Abstract

The invention discloses a titanium-containing alumina dry rubber powder and a preparation method thereof. The preparation process of the titanium-containing alumina dry rubber powder includes the following steps: (1) Prepare a mixed slurry of nano-titanium dioxide and ammonium citrate. The mass content of nano-titanium dioxide in the mixed slurry is 5%-30%, and the mass content of ammonium citrate is is 0.25%-5%, and the particle size of the nano-titanium dioxide is 10~100nm; (2) Prepare aluminum salt and precipitant, and perform a co-precipitation reaction to obtain a solution containing aluminum hydroxide sol. After aging, add step (1) The prepared mixed solution continues to be aged. The amount of the prepared mixed solution in step (1) is 1%-10% based on the mass content of nano-titanium dioxide in the final catalyst; (3) the aged material is filtered, washed and dried to obtain Titanium-containing aluminum oxide. This method is conducive to the concentration of titanium on the surface of the alumina carrier and its high dispersion, and improves the physical and chemical properties of the alumina dry rubber powder.

Description

technical field [0001] The invention relates to a titanium-containing alumina dry rubber powder and a preparation method thereof, in particular to a titanium-containing alumina dry rubber powder suitable for a hydrogenation catalyst carrier and a preparation method thereof. Background technique [0002] With the increasing of heavy and inferior crude oil and the increasingly stringent requirements of environmental protection regulations, the requirements for light oil are constantly increasing. In order to meet the requirements of environmental regulations, hydrogenation is one of the main methods to reduce sulfide and nitrogen compounds in fuel oil. Catalysts play an important role in the hydrogenation process. At present, most of the catalysts used are based on alumina as the carrier, with Group VIII and / or Group VIB metals as active components. The surface properties of a single alumina cannot meet the requirements of the catalyst. For example, the interaction between t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J32/00B01J35/10B01J23/883C10G45/08
CPCC10G45/08B01J21/063C10G2400/04B01J35/615B01J35/635B01J35/638B01J35/647
Inventor 唐兆吉杨占林姜虹温德荣王平孙立刚
Owner CHINA PETROLEUM & CHEM CORP