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Alumina-titanium oxide composite carrier preparation method

A technology of composite carrier and titanium oxide, which is applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems such as easy pollution of the environment, achieve environmental pollution prevention, excellent low-temperature hydrogenation activity, and avoid environmental problems Effect

Pending Publication Date: 2020-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst is only suitable for low-carbon hydrogenation and nitrate is used in the catalyst preparation process, which is very easy to cause pollution to the environment

Method used

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  • Alumina-titanium oxide composite carrier preparation method
  • Alumina-titanium oxide composite carrier preparation method
  • Alumina-titanium oxide composite carrier preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The aluminum sulfate solution of 0.9mol / L and the titanium sulfate solution of 0.24mol / L and the sodium hydroxide solution of 0.3mol / L flow into the container simultaneously, wherein the volume ratio of the aluminum sulfate solution and the titanium sulfate solution is 1:1, At a temperature of 80°C, control the amount of sodium hydroxide solution so that the pH value of the co-current solution is controlled at 8.5 to form alumina-titanium oxide co-precipitates, which are washed repeatedly with deionized water to remove sulfate ions, and then used The reverse osmosis membrane filters out the sodium ions in the solution, and finally obtains the alumina-titania filter cake, which is extruded and dried at 110°C for 10 hours, and then calcined at 600°C for 6 hours to obtain the alumina-titania composite Carrier A. Among them, aluminum oxide accounts for 82.2wt%, titanium oxide accounts for 17.1wt%, and the sodium ion content is 0.7wt%.

Embodiment 2

[0032] The aluminum sulfate solution of 0.56mol / L, the titanium sulfate solution of 0.22mol / L and the potassium hydroxide solution of 0.3mol / L flow into the container, wherein the volume ratio of the aluminum sulfate solution and the titanium sulfate solution is 1:1, At a temperature of 80°C, adjust the amount of sodium hydroxide solution so that the pH value of the co-current solution is controlled at 8 to generate alumina-titanium oxide co-precipitates, which are washed repeatedly with deionized water to remove sulfate ions, and then used Potassium ions in the solution were removed by reverse osmosis membrane filtration to obtain alumina-titania filter cake, which was extruded and dried at 110°C for 11 hours, and then calcined at 800°C for 5 hours to obtain alumina-titania composite support b. Among them, aluminum oxide accounts for 76.1wt%, titanium oxide accounts for 23wt%, and potassium ion content is 0.9wt%.

Embodiment 3

[0034]The aluminum sulfate solution of 0.86mol / L, the titanium sulfate solution of 0.26mol / L and the potassium hydroxide solution of 0.1mol / L flow into the container simultaneously, wherein the volume ratio of the aluminum sulfate solution and the titanium sulfate solution is 1:1, At a temperature of 80°C, adjust the amount of sodium hydroxide solution so that the pH value of the co-current solution is controlled at 9 to form alumina-titanium oxide co-precipitates, which are washed repeatedly with deionized water to remove sulfate ions, and then use Potassium ions in the solution were filtered out by reverse osmosis membrane to obtain alumina-titania filter cake, which was extruded and dried at 120°C for 12 hours, and then calcined at 800°C for 7 hours to obtain alumina-titania composite support c. Among them, aluminum oxide accounts for 80.2wt%, titanium oxide accounts for 19.1wt%, and potassium ion content is 0.7wt%.

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Abstract

The invention provides an alumina-titanium oxide composite carrier preparation method which comprises the steps: S1, carrying out parallel flow on a soluble aluminum salt aqueous solution, a soluble titanium salt aqueous solution and a strong alkali aqueous solution to generate a precipitate, washing the generated precipitate, and treating with a reverse osmosis membrane to remove alkaline cationsintroduced by a strong alkali; and step S2, drying and roasting the product obtained in the step S1 to obtain the alumina-titanium oxide composite carrier. The alumina-titanium oxide composite carrier preparation method is green and environment-friendly, and the content of alkaline cations is controlled by adopting a reverse osmosis membrane treatment process so that the influence of the alkalinecations on the performance of the catalyst is avoided.

Description

technical field [0001] The invention relates to a preparation method and application of an alumina-titania composite carrier. Background technique [0002] Alumina is a relatively common catalyst carrier, which has excellent performance. Compared with alumina, titanium oxide has poor mechanical strength, small specific surface area, and poor thermal stability. However, the alumina-titania composite carrier not only maintains the advantages of high strength, large specific surface area and good thermal stability of alumina, but also has the characteristics of high activity of titania. The combination of the two makes the properties of the catalyst qualitatively changed. Changes, thereby improving the overall activity and stability of the catalyst. [0003] There are many preparation methods of alumina-titania composite carrier, and it is reported that there are sol method, kneading method and co-precipitation method. The sol method has poor thermal stability. The componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/755B01J32/00B01J37/00B01J37/02B01J37/03B01J37/08C07C5/03C07C9/14
CPCB01J21/063B01J37/031B01J37/009B01J37/082B01J37/0201B01J23/755B01J23/002C07C5/03B01J2523/00C07C2523/755B01J2523/31B01J2523/47B01J2523/847C07C9/14
Inventor 季静杜周纪玉国熊凯任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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