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Preparation method of alumina carrier

A technology of alumina carrier and sodium metaaluminate, which is applied in the direction of catalyst carrier, chemical instrument and method, catalyst activation/preparation, etc., can solve the problem of organic pore-enlarging agent and colloid, uneven distribution of macropores, and complicated preparation process etc. to achieve low cost, easy operation and simple process

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all add organic pore-enlarging agent in the beating process after the gel is formed. This method not only has a long production process and a complicated preparation process, but also because of the high viscosity of the colloid, it is difficult to make the organic pore-enlarging agent and the colloid fully Contact, resulting in non-concentrated pore distribution, uneven distribution of large pores in the alumina carrier, and a large number of small pores

Method used

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  • Preparation method of alumina carrier

Examples

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Effect test

Embodiment 1

[0030] Take industrial grade aluminum hydroxide powder and industrial grade sodium hydroxide to configure a concentration of 365g Al 2 o 3 / L concentrated sodium metaaluminate solution, then diluted to a concentration of 25g Al 2 o 3 / L of sodium metaaluminate solution, control the gelling temperature at 29°C, add the condensation product of organic pore-enlarging agent alkylphenol and ethylene oxide (OP-10) and polyoxyethylene sorbitan monooleate ( T-80), wherein the weight ratio of OP-10 and T-80 is 60:40, the amount of organic pore expander accounts for 0.6% of the weight of sodium metaaluminate, diesel oil is used as defoamer, and the amount of defoamer is organic pore expander 0.5% by weight with air and CO 2 The mixed gas, the flow rate is 0.8m 3 / h.(m 3 Sodium metaaluminate solution), where CO 2 The volume fraction of the mixture is 50%, and the mixed gas is used to stir, and the gelation stops when the pH value drops to 10. The slurry was washed with deionized w...

Embodiment 2

[0032] Take industrial grade aluminum hydroxide powder and industrial grade sodium hydroxide to configure a concentration of 365g Al 2 o 3 / L concentrated sodium metaaluminate solution, then diluted to a concentration of 25g Al2 o 3 / L of sodium metaaluminate solution, control the gelling temperature at 29°C, add the condensation product of organic pore-enlarging agent alkylphenol and ethylene oxide (OP-10) and polyoxyethylene sorbitan monooleate ( T-80), wherein the weight ratio of OP-10 and T-80 is 60:40, the amount of organic pore-enlarging agent accounts for 0.6% of the weight of sodium metaaluminate, diesel oil is used as silicone oil, and the amount of silicone oil is 0.7% of the weight of organic pore-enlarging agent , into air and CO 2 The mixed gas, the flow rate is 0.8m 3 / h.(m 3 Sodium metaaluminate solution), where CO 2 The volume fraction of the mixture is 50%, and the mixed gas is used to stir, and the gelation stops when the pH value drops to 10. The slurr...

Embodiment 3

[0034] Same as Example 1, the difference is that the organic pore-enlarging agent OP-10 and T-80 are replaced by OP-12 and T-80, wherein the weight ratio of OP-12 and T-80 is 70: 30, organic pore-enlarging Table 1 shows the physical and chemical properties of the obtained alumina support.

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Abstract

The invention discloses a preparation method of alumina carrier, wherein the alumina carrier is prepared by means of a carbonization method, and an organic pore-enlarging agent and a defoaming agent are added before infusing CO2, so that the size and the distribution of air bubble are controlled, the alumina carrier which is obtained by means the method has the advantages of large pore volume, large aperture, centralized hole distribution and even distribution of macropore, and the preparation method provided by the invention is particularly suitable for preparing the hydrotreating catalyst carrier of heavy oil or residual oil.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier, in particular to a method for preparing an alumina carrier with large pore volume and large pore diameter suitable for use as a hydrogenation catalyst component. Background technique [0002] There are many types of alumina such as γ-, η-, θ-, δ-, and α-Al 2 o 3 etc., where γ- and η-Al 2 o 3 For the commonly used activated alumina. [0003] Activated alumina has a good surface area and pore structure, especially γ-Al 2 o 3 Due to its large specific surface area, adjustable pore structure and good thermal stability, it is widely used as catalyst carrier, desiccant and adsorbent in oil refining, petrochemical and fertilizer industries. Preparation of γ-Al 2 o 3 The usual method is to prepare pseudo-boehmite first, and then roast it at a certain temperature to convert it into γ-Al 2 o 3 . Pseudo-boehmite generally has three preparation methods in industry: [0004] (1) The neu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J37/00B01J35/10C10G45/04C10G45/08
Inventor 付秋红王永林杨刚
Owner CHINA PETROLEUM & CHEM CORP
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