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Preparation method and application of macroporous alumina supporter

A macroporous alumina and alumina carrier technology, which is applied in catalyst carriers, chemical instruments and methods, alumina/aluminum hydroxide, etc., can solve the problems of insufficient pore size and small pore volume of alumina carrier.

Active Publication Date: 2014-10-08
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 glue 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 sesbania powder, and 3.0g boric acid (ground finely, passed through a 200-mesh sieve, the same below), and mix well.

[0038] 10.0g of commercially available PVA1788 powder, dissolve in 120mL of water under stirring and slowly heating. When the dissolution is complete, add 4.0g of citric acid. After dissolution, add to the uniformly mixed dry rubber powder. After kneading for many times, let stand for 30 minutes It was extruded into a cylindrical strip with a diameter of 1.5 mm, the extruded strip was dried at 120°C for 4 hours, then calcined at 580°C for 3 hours, and then taken out. It was 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 sesbania powder and 2.5g borax (analytical purity), and mix well.

[0041] 8.0g of commercially available PVA1788 powder, dissolve in 115mL of water under stirring and slow heating, add to the uniformly mixed dry rubber powder after dissolution, kneading for many times, stand for 15 minutes and extrude into a cylindrical strip with a diameter of 2.5mm After drying the extruded bar at 120°C for 5 hours, it was taken out after being calcined at 550°C for 3 hours, and it was 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 sesbania powder, 0.5g borax (analytical purity), and 2.0g boric acid to mix well.

[0044] Commercially available PVA1792 powder 8.0g, dissolve it in 115mL1.5% dilute nitric acid aqueous solution under stirring and slowly heating, add it to the uniformly mixed dry rubber powder after dissolution, after kneading for many times, let it stand for 20 minutes and squeeze into diameter It is a cylindrical bar of 2.0 mm. The extruded bar is dried at 120°C for 4 hours, then fired at 560°C for 3 hours and then taken out. It is recorded as sample C. The pore structure properties of the carrier are shown in Table 1.

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PUM

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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, and belongs to a preparation and treatment method of a catalyst in the chemical field. Background technique [0002] Alumina supports are commonly used in the preparation of catalysts, and pore size and pore distribution are important factors affecting alumina supports. For raw materials with higher metal content, the hydrogenation catalyst support usually has a larger pore volume and pore size. [0003] Chinese patent CN200410050718.8 proposes a method for preparing macroporous alumina. The specific preparation method is that powders such as crop stem shells are used as pore expanders 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 pseudo-boehmite dry powder glue, carbon blac...

Claims

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Application Information

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