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A kind of preparation method and application of macroporous alumina carrier

A technology of macroporous alumina and carrier, which is applied in the direction of catalyst carrier, chemical instrument and method, alumina/aluminum hydroxide, etc. It can solve the problems of small pore volume and insufficient pore diameter of alumina carrier

Active Publication Date: 2016-11-02
新疆恒晟能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to propose a new preparation method of alumina carrier for the problem that the pore volume of the existing alumina carrier is too small and the pore diameter is not large enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take macroporous dry rubber powder (commercially available model PB1-3, pore volume 1.08mL / g, specific surface area 307m 2 / g, the same below) 141.0g, add 3.0g of scallop powder, 3.0g of boric acid (grind, pass through a 200-mesh sieve, the same below), and mix well.

[0038] Dissolve 10.0g of commercially available PVA1788 powder in 120mL of water under stirring and heating slowly. After the dissolution is complete, add 4.0g of citric acid. Extruded into cylindrical strips with a diameter of 1.5mm, the extruded strips were dried at 120°C for 4 hours, and then baked at 580°C for 3 hours, then taken out and recorded as sample A. The pore structure properties of the carrier are shown in Table 1.

Embodiment 2

[0040] Take 141.0g of macroporous dry rubber powder, add 3.0g of scallop powder, 2.5g of borax (analytical pure), and mix well.

[0041] Dissolve 8.0g of commercially available PVA1788 powder in 115mL of water under stirring and heating slowly. After the dissolution is complete, add it to the well-mixed dry rubber powder. , the extruded strips were dried at 120°C for 5 hours, and then baked at 550°C for 3 hours, then taken out and recorded as sample B. The pore structure properties of the carrier are shown in Table 1.

Embodiment 3

[0043] Take 141.0g of macroporous dry rubber powder, add 3.0g of scallop powder, 0.5g of borax (analytical pure), 2.0g of boric acid and mix well.

[0044] Dissolve 8.0g of commercially available PVA1792 powder in 115mL of 1.5% dilute nitric acid aqueous solution under stirring and heating slowly. The extruded strip was dried at 120°C for 4 hours, then baked at 560°C for 3 hours and then taken out, which was designated as sample C. The pore structure properties of the carrier are shown in Table 1.

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Abstract

The invention discloses a preparation method of a macroporous alumina supporter, which solves the problems of small pore volume and small pore size in the existing alumina supporter. The preparation method comprises the following steps: dissolving polyvinyl alcohol in a glue solution, uniformly mixing with macroporous dry glue powder and boron-containing compound, kneading, forming, drying and roasting. The method can be used for preparing the alumina supporter with higher pore size concentration and larger pore volume. The supporter can be used for preparing a hydrogenation catalyst and can also be used for a desulfurization, denitrification, deoxidation or metal-removal catalyst.

Description

technical field [0001] The invention relates to a preparation method and application of a macroporous alumina carrier, which belongs to the preparation and treatment method of a catalyst in the field of chemistry. Background technique [0002] Alumina supports are commonly used in the preparation of catalysts, and the pore size and pore distribution are important factors affecting alumina supports. For raw materials with higher metal content, the carrier of the hydrogenation catalyst usually has a larger pore volume and pore diameter. [0003] Chinese patent CN200410050718.8 proposes a preparation method of macroporous alumina. The specific preparation method is to use crop stem shell and other powders as pore-enlarging agents in the preparation process, and the addition amount is 10-20wt% of alumina. [0004] Chinese patent CN201110188416.7 proposes a method for preparing a macroporous alumina carrier. The specific steps are as follows: Weigh a certain amount of pseudoboeh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02B01J32/00B01J35/10
Inventor 吴建明
Owner 新疆恒晟能源科技有限公司
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