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Preparation method for alumina carrier

A kind of technology of alumina carrier and carrier, which is applied in the direction of catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problems of catalyst deactivation, catalyst blockage, etc., and achieve the goal of increasing pore volume, good support, and preventing collapse Effect

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of hydrodemetallization of heavy and residual oil, metals such as Ni and V are deposited on the catalyst in the form of sulfide, and these deposits block the external pores of the catalyst, resulting in catalyst deactivation.

Method used

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  • Preparation method for alumina carrier
  • Preparation method for alumina carrier
  • Preparation method for alumina carrier

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Weigh 100g of pseudo-boehmite dry rubber powder (produced by Wenzhou Jingjing Alumina Co., Ltd., with a water absorption rate of 1.2ml / g) and place it in a beaker, and add 200mL of 25% xylitol aqueous solution to the beaker for immersion. 4 hours. The impregnated material was filtered, and the filter cake was transferred to an autoclave and sealed at 140° C. for 10 hours. After drying, the processed material is kneaded uniformly with 5 g of succulent powder and an appropriate amount of 5% citric acid aqueous solution, and then extruded into strips. The shaped wet strips were dried at 120°C for 8 hours. The dried carrier is put into the spray rolling pot, and in the rotating state, 80 ml of the solution containing 1.6 grams of ammonium oxalate and 8 grams of phosphoric acid is sprayed and soaked to the carrier in the rolling pot by atomization. The mass concentration of ammonium ions in the solution is 0.6%, and the mass ratio of phosphoric acid to ammonium oxalate is ...

example 2

[0027] The same as Example 1, except that the mixed aqueous solution of sorbitol and mannitol with a mass concentration of 40% and a mass ratio of 1:1 was used for dipping for 3 hours. The temperature of the carbonization treatment was 130° C. for 14 hours of sealing treatment. When spraying phosphoric acid and ammonium oxalate solution, use 50ml of unsaturated spray dipping solution containing 1.5 g of ammonium oxalate and 10.5 g of phosphoric acid for the first spray impregnation (the mass concentration of ammonium ions in the solution is 0.9%, phosphoric acid and oxalic acid) The mass ratio of ammonium is 7:1), the temperature of the first sealing heat treatment is 120 ° C, the treatment time is 10 hours, and the second spray impregnation is 30ml of the above solution unsaturated spray impregnation. The temperature of the second sealing heat treatment is 150° C. and the treatment time is 6 hours, and the alumina carrier A2 of the present invention is prepared.

example 3

[0029] The same as Example 1, except that the mixed aqueous solution of glucose and ribose with a mass concentration of 30% and a mass ratio of 1:1 was used for dipping for 5 hours. The temperature of the carbonization treatment was 120° C. for 16 hours of sealing treatment. When spraying phosphoric acid and ammonium oxalate solution, the first unsaturated spray impregnation is unsaturated spray impregnation with 60ml of a solution containing 2.4 g of ammonium oxalate and 7.2 g of phosphoric acid (the mass concentration of ammonium ions in the solution is 1.2%, phosphoric acid The mass ratio to ammonium oxalate is 3:1), the temperature of the first sealing heat treatment is 160 ° C, the treatment time is 6 hours, and the second spray impregnation is impregnated with 20ml of the above solution unsaturated spray impregnation. The temperature of the second sealing heat treatment was 130° C. and the treatment time was 12 hours, and the alumina carrier A3 of the present invention w...

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Abstract

The invention discloses a preparation method for an alumina carrier. The preparation method comprises the following steps: (1) weighing a certain amount of pseudo-boehmite dry glue powder and impregnating the pseudo-boehmite dry glue powder with a proper amount of an aqueous solution containing polyol and / or carbohydrate substances; (2) subjecting a material obtained in the step (1) to hydro-thermal carbonizing treatment; and (3) subjecting a material obtained in step (2) to extrusion moulding, then subjecting the dried carrier to nonsaturated spraying and impregnation with a mixed solution of phosphoric acid and ammonium oxalate, carrying out hermetic heating treatment on the impregnated carrier and then carrying out drying and roasting so as to obtain the alumina carrier. The alumina carrier prepared by using the method has a great pore volume and great pore sizes; macro pores are nonuniformly distributed in the alumina carrier along a radial direction; and the carrier is applicable to the field of preparation of hydrogenation demetalization catalysts for heavy oil and 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 relatively large pore volume and pore diameter. Background technique [0002] At present, in the production process of heavy oil hydrodemetallization, because the raw oil contains a certain amount of impurities such as vanadium, sulfur, arsenic, nickel, etc., it is easy to form deposits, thereby blocking the pores of the catalyst, resulting in a rapid decline in catalyst activity, and even Inactivation affects industrial applications. 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. 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 diamet...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J35/10B01J32/00C10G45/04
Inventor 季洪海王少军凌凤香沈智奇杨卫亚王丽华郭长友
Owner CHINA PETROLEUM & CHEM CORP
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