Alumina carrier and its preparation method

A technology of alumina carrier and aluminum hydroxide, which is applied in the direction of catalyst carrier, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of large bubble size, diffuse pore size distribution, blockage of distribution plate products, etc., and achieve circulation speed Fast, large specific surface area, large pore volume effect

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two reactors avoid the disadvantages of high energy consumption, uneven gas distribution, and low utilization rate of traditional mechanically stirred reactors to a certain extent, but have the following disadvantages: (1) The gas distribution tube and distribution plate are easily formed (2) After gas distribution, the bubble size is still large, and the gas utilization rate needs to be further improved; (3) The prepared aluminum hydroxide grain size is not uniform, and the pore size distribution is dispersed

Method used

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  • Alumina carrier and its preparation method
  • Alumina carrier and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take industrial-grade aluminum hydroxide powder and industrial-grade sodium hydroxide to configure a concentration of 365 gAl 2 o 3 / L concentrated sodium metaaluminate solution, then diluted to a concentration of 28gAl 2 o 3 / L of sodium metaaluminate solution, add organic pore expander alkylphenol and ethylene oxide condensation product (OP-10) and polyoxyethylene sorbitan monooleate (T-80), where OP- The weight ratio of 10 to T-80 is 60:40, the amount of pore expander accounts for 0.6% of the weight of sodium metaaluminate, diesel oil is used as the defoamer, and the amount of defoamer is 0.6% of the weight of the pore expander. The solution is added to the jet loop reactor, the mixed gas of carbon dioxide and air is injected into the reactor, CO 2 The volume concentration is 60%, and the average gas holdup rate is controlled to 0.20, so that the fluid is uniformly mixed in the reactor and forms a circulation flow. When the gel stops. Wash the slurry with deioniz...

Embodiment 2

[0037] Take industrial-grade aluminum hydroxide powder and industrial-grade sodium hydroxide to configure a concentration of 365 gAl 2 o 3 / L concentrated sodium metaaluminate solution, then diluted to a concentration of 28gAl 2 o 3 / L of sodium metaaluminate solution, add organic pore expander alkylphenol and ethylene oxide condensation product (OP-10) and polyoxyethylene sorbitan monooleate (T-80), where OP- The weight ratio of 10 to T-80 is 60:40, the amount of pore expander accounts for 0.6% of the weight of sodium metaaluminate, diesel oil is used as the defoamer, and the amount of defoamer is 0.6% of the weight of the pore expander. The solution is added to the jet loop reactor, the mixed gas of carbon dioxide and air is injected into the reactor, CO 2 The volume concentration is 60%, and the average gas holdup rate is controlled to 0.20, so that the fluid is uniformly mixed in the reactor and forms a circulation flow. When the gel stops. Wash the slurry with deioni...

Embodiment 3

[0039] The preparation method of the alumina carrier is the same as in Example 1, the difference is that the control of air and CO 2 The gas holdup of the mixed gas is 0.15, and the circulation velocity is 1.80 m / s. The physical and chemical properties of the obtained alumina B-3 are shown in Table 1.

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Abstract

The invention discloses an alumina carrier and its preparation method. The alumina carrier is prepared in a loop reactor by a carbonization method. The preparation method comprises: placing a reaction material in the loop reactor, then jetting a mixed gas of air and/or an inert gas and CO2 into the reactor, and making use of the directional and regular circular flow of the fluid inside the loop reactor to make the fluid fully mixed, thus achieving gelatinizing at one time. The obtained alumina carrier has the characteristics of large pore volume, large pore diameter, and concentrated pore size distribution, thus being especially suitable to serving as a heavy oil or residual oil hydrodemetallization catalyst carrier.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, in particular to an alumina carrier with large pore volume and large pore diameter suitable for use as a carrier component of a hydrogenation demetallization catalyst and a preparation method thereof. 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. They are all defective spinel structures, and because of their excellent surface properties, such as large surface area, strong surface adsorption performance, surface acid centers, and porous and macroscopic structures, they are widely used as catalysts, carriers, and dry adsorbents. In petrochemical industry, organic chemical industry, rubber industry, chemical fertilizer industry and environmental protection industry, especially γ-Al 2 o 3 Due to its large specific surface area, adjustable pore struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J35/10B01J21/04
Inventor 付秋红朱慧红王永林高鹏张艳侠段日
Owner CHINA PETROLEUM & CHEM CORP
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