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Method for preparing alumina supporters

A technology of alumina carrier and aluminum hydroxide, which is applied in the direction of catalyst carrier, chemical instrument and method, catalyst activation/preparation, etc., can solve the problems of poor penetration of large-diameter pores, and achieve easy implementation, wide sources, and simple preparation process Effect

Active Publication Date: 2012-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method disclosed in the above-mentioned patent is to use a powdery or liquid pore-enlarging agent. Although it can expand the pores, the penetration of the large-diameter channels is poor.

Method used

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  • Method for preparing alumina supporters
  • Method for preparing alumina supporters
  • Method for preparing alumina supporters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The template agent used in this embodiment is rod-shaped yeast with a diameter of 2 μm and a length of 10-1000 μm. Yeast is obtained by fermentation, and the fermented product is washed 3 times with a saturated solution containing potassium dihydrogen phosphate.

[0032] Add 3g of nitric acid, 180ml of water and 60g of yeast into 200g of macroporous aluminum hydroxide powder produced by carbonization, mix evenly, extrude into strips, then dry at 100°C for 5 hours in an air atmosphere, and bake at 450°C for 8 hours , to obtain alumina support A1, its properties are shown in Table 1.

Embodiment 2

[0034] The template agent used in this embodiment is rod-shaped yeast with a diameter of 2 μm and a length of 10-1000 μm. Yeast is obtained by fermentation, and the fermented product is washed 3 times with a saturated solution containing potassium dihydrogen phosphate.

[0035] Add 3g of nitric acid, 180ml of water and 30g of yeast into 200g of macroporous aluminum hydroxide powder produced by carbonization, mix evenly, extrude into strips, then dry at 100°C for 5 hours in an air atmosphere, and bake at 450°C for 8 hours , to obtain alumina support A2, its properties are shown in Table 1. .

[0036] Table 1 The properties of the examples of the present invention and comparative examples of alumina carrier

[0037] sample

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Abstract

The invention discloses a method for preparing alumina supporters. The method comprises the following steps of: mixing micron-sized slender fungi serving as a template, aluminum hydroxide raw powder and an adhesive to obtain a mixture; and molding, drying and baking the mixture to obtain the alumina supporters. Pores of alumina can be enlarged by selecting the fungi with appropriate diameters according to actual macromolecular reactants and resultants, and the micron-sized pores have high penetrability, which contributes to the reaction and diffusion of macromolecular substances.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier, in particular to a method for preparing a micron-sized through-pore alumina carrier. Background technique [0002] Alumina is the most important carrier of catalysts and is widely used in petrochemical industry. At present, the catalyst is basically based on alumina as a carrier. The synthesis methods mainly include the aluminum sulfate method and the carbonization method. The pores are interstitial pores formed between nanoparticles, and the diameter of the pores is small, which is not suitable for the reaction and diffusion of macromolecular substances. [0003] At present, physical and / or chemical methods are usually used to expand pores to increase large-diameter channels. CN1068975A proposes a method for preparing an alumina carrier with low density, large pore volume and high strength. The method is as follows: Aluminum salt or aluminate is neutralized to obtain pseudo-boehmit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/04B01J37/36B01J37/04B01J37/08B01J35/02
Inventor 王鼎聪刘纪端陈金汤
Owner CHINA PETROLEUM & CHEM CORP
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