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Preparation method for alumina carrier

A technology of alumina carrier and pseudo-boehmite, which is applied in the direction of alumina/hydroxide preparation, catalyst carrier, chemical instruments and methods, etc., can solve problems such as non-concentration, poor mechanical strength, and dispersion of final carrier pore distribution , to achieve the effects of being easy to master, reducing production costs, and controlling product properties

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large and non-concentrated carbon black powder particles, the pore distribution of the final carrier is dispersed and non-concentrated, and the mechanical strength is poor

Method used

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  • Preparation method for alumina carrier

Examples

Experimental program
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Effect test

example 1

[0024] Weigh 100 g of pseudo-boehmite dry rubber powder (produced by Shenyang Catalyst Factory, with an alumina dry basis content of 65%), add 2 g of fennel powder and mix evenly, dissolve 3 g of glucose and 1.5 g of phosphoric acid in 80 mL of distilled water, and dissolve the resulting solution Mix with the above materials evenly, extrude into a clover-shaped strip with a diameter of 1.8mm on a screw extruder, dry at 120°C for 3 hours, bake the dried molded product at 450°C for 2 hours, and then bake it at 650°C Calcined at the temperature for 3 hours to obtain the alumina carrier B1 provided by the present invention.

example 2

[0026] Same as Example 1, except that glucose is changed to sucrose, the addition is 5g, the addition of phosphoric acid is 1.0g, and the molding is roasted at a temperature of 500°C for 1.5 hours, and then roasted at a temperature of 700°C for 2 hours to obtain the present invention. alumina carrier B2.

example 3

[0028] Same as example 1, except that the addition of glucose is 6g, the addition of phosphoric acid is 0.8g, the molding is roasted at a temperature of 500°C for 1.5 hours, and then fired at a temperature of 650°C for 2.5 hours to obtain the alumina provided by the present invention Vector B3.

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Abstract

The invention discloses a preparation method for an alumina carrier, which includes the following steps: (1) dry pseudoboehmite gel powder and extrusion aid are uniformly mixed and then added into aqueous solution in which physical pore-expanding agent and chemical pore-expanding agent are dissolved; (2) the material obtained in step 1 is uniformly mixed and molded by extrusion on an extruder; (3) the material obtained in step 2 is dried and baked, and thereby the finished alumina carrier is prepared. The alumina carrier prepared by the method has large pore volume and pore diameter, centrally distributed pores and high mechanical strength, and is applicable to the preparation of heavy oil and residual oil hydrodemetallization catalysts and other fields.

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, pore diameter and concentrated pore distribution. Background technique [0002] With the continuous reduction of oil resources and the increasing trend of heavy and inferior crude oil, heavy oil deep processing technology has been highly valued by refiners at home and abroad. Hydrodemetallization catalysts used for heavy oil, especially vacuum residue with high metal content, are prone to rapid decline and deactivation of catalyst activity 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 capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. The...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/04B01J35/10C01F7/30
Inventor 季洪海沈智奇凌凤香王少军杨卫亚王丽华郭长友
Owner CHINA PETROLEUM & CHEM CORP
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