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Macroporous aluminium oxide carrier and its preparing method

A technology of macroporous alumina and carrier, which is applied in the direction of catalyst carrier, chemical instrument and method, chemical/physical process, etc. It can solve the problems of large amount of organic pore-enlarging agent, poor pore-enlarging effect, and low dosage, and achieve pore-enlarging significant effect

Active Publication Date: 2005-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new dosage of organic pore-enlarging agent for the shortcomings of large amount of organic pore-enlarging agent used in the existing method for preparing macroporous alumina carrier, and poor pore-enlarging effect when the amount of organic pore-enlarging agent is low. Method for preparing macroporous alumina carrier with low pore size and good pore expansion effect and macroporous alumina carrier prepared by the method

Method used

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  • Macroporous aluminium oxide carrier and its preparing method
  • Macroporous aluminium oxide carrier and its preparing method

Examples

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Effect test

example 1

[0039] Adopt aluminum hydroxide (Shandong aluminum plant product) and sodium hydroxide (Beijing chemical plant product) reaction preparation concentration to be the NaAlO of 200 grams alumina / liter 2 solution, this solution was mixed with a concentration of 90 grams of alumina / liter of Al 2 (SO 4 ) 3 Solution (Changling Oil Refinery Catalyst Factory product) joins in the gel forming tank of a 2 liters simultaneously with the mode of concurrent flow, puts 1.5 liters of water in advance in the tank, NaAlO 2 The flow rate of the solution is 1.1 liters / hour, adjust the Al 2 (SO 4 ) 3 The flow rate of the solution is such that the gelling pH value is 8, and the temperature of the gelling process is 50°C. The slurry generated by the gelling is collected in an aging tank. After collecting for 20 minutes, the slurry is switched to another aging tank for collection. Add sodium carbonate to the collected aging tank to adjust the pH to 10, then age for 50 minutes, filter, and wash 4...

example 2

[0047] Get 20 liters of concentration and be the sodium metaaluminate solution (preparation method is the same as example 1) of 20 grams of aluminum oxide / liter, be placed in a 25 liters of gelling tank, initial temperature 15 ℃, pass into carbon dioxide from the bottom of gelling tank A mixture of carbon dioxide and air with a content of 30% by volume, the flow rate of the mixture is 35 meters 3 / hour, reacted for 5 minutes, the pH value dropped to 6.8 (end point pH value), and the reaction temperature was 28°C at this time. The boehmite wet filter cake was gelled and washed twice in the same way to obtain a total of about 8 kg of pseudo-boehmite wet filter cake. Take 50 grams of the wet filter cake and dry it at 130°C for 3 hours. X-ray diffraction Its relative crystallinity was determined to be 58%.

[0048] Get this wet filter cake 5.5 kilograms (Al 2 o 3 content of 14% by weight) mixed with 7.7 grams of polyethylene glycol with a molecular weight of 2000, added water ...

example 3

[0056] Al at a concentration of 15 g alumina / L 2 (SO 4 ) 3 (product of Beijing Chemical Plant) solution and NH at a concentration of 17 g / L 4 HCO 3 (product of Beijing chemical factory) solution joins in a 3 liters of glue-forming tank simultaneously with the mode of parallel flow, puts 1.5 liters of water in advance in the tank, Al 2 (SO 4 ) 3 The flow rate of the solution is 2.5 l / h, adjust the NH 4 HCO 3 The flow rate of the solution is such that the gelling pH value is 6.0, and the temperature of the gelling process is 30°C. The slurry generated by the gelling process is collected in an aging tank, and after 60 minutes of collection, the slurry is switched to another aging tank for collection. The slurry in the aging tank that has been collected is aged for 30 minutes, filtered, and washed 4 times with 30 times 55°C deionized water to prepare 7.5 kg of pseudo-boehmite wet filter cake, and take 50 grams of the wet filter cake at 130°C After drying for 3 hours, the r...

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Abstract

The present invention is macroporous alumina carrier and its preparation process. The carrier has pore volume of 0.9-1.3 ml / g, pore volume rate of pores smaller than 20 nm in 55-85 %, pore volume rate of 20-100 nm diameter pores in 7-25 %, and pore volume rate of pores greater than 100 nm in 7-25 %. The preparation process of the carrier includes forming and roasting pseudo-thin diasphore composition containing organic pore expanding agent. The preparation process of the present invention has relatively low organic pore expanding agent consumption and high pore expanding effect. The prepared macroporous alumina carrier is used in catalyst for hydrogenating and demetallating heavy and residual oil, especially decompression residual oil with high metal content.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, more specifically to a macroporous alumina carrier and a preparation method thereof. Background technique [0002] Hydrodemetallization catalysts used for heavy oil, especially for vacuum residues with high metal content, are prone to rapid decline in activity and deactivation due to the deposition of metal impurities such as nickel and vanadium. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon storage capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. [0003] The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. Therefore, the preparation of a carrier with a larger pore volume and larger pore diameter is an important step in the preparation of residual oil, especially for the preparation of vacuum residue hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J32/00
Inventor 杨清河朱立康小洪聂红石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP
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