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Preparation method of core-shell type carrier using TiO2 as shell layer

A core-shell type, carrier technology, applied in catalyst activation/preparation, separation method, catalyst carrier, etc., can solve the problems of easy penetration of active components into the substrate, uneven thickness of the shell layer, low mechanical strength, etc.

Inactive Publication Date: 2017-09-22
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the TiO in the prior art 2 The core-shell type carrier is the shell layer, the thickness of the shell layer is not uniform, when it is loaded with active components, the active components are easy to penetrate into the substrate, and the defects of low mechanical strength, thus providing a TiO 2 The preparation method of the core-shell type carrier that is shell layer

Method used

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  • Preparation method of core-shell type carrier using TiO2 as shell layer
  • Preparation method of core-shell type carrier using TiO2 as shell layer
  • Preparation method of core-shell type carrier using TiO2 as shell layer

Examples

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Embodiment 1

[0021] A TiO 2 A preparation method for a core-shell carrier of the shell, comprising:

[0022] (1) At room temperature, mix silica sol, aluminum sol, titanium sol, squash gum, CMC (sodium carboxymethyl cellulose) and water, and stir evenly to obtain a glue solution, wherein, in the glue solution, SiO 2 、Al 2 o 3 、TiO 2 , the mass ratio of Tianqing glue, CMC and water is 0.1:0.1:10:1:0.1:100;

[0023] (2) Choose a spherical α-Al with a diameter of 2mm 2 o 3 Put it in the sugar coating machine as the base material, spray the glue solution on the base material with the mass ratio of the glue solution and the base material as 1:25, and then roll it in the sugar coating machine for 0.5h, so that the glue solution can be evenly coated On the outside of the substrate, a carrier precursor is obtained, and titanium dioxide powder is sprayed on the carrier precursor; wherein, the titanium dioxide powder is 300 mesh anatase titanium dioxide powder;

[0024] (3) After spraying tit...

Embodiment 2

[0026] A TiO 2 A preparation method for a core-shell carrier of the shell, comprising:

[0027] (1) At room temperature, mix silica sol, aluminum sol, titanium sol, squash gum, CMC and water, stir evenly to obtain a glue solution, wherein, in the glue solution, SiO 2 、Al 2 o 3 、TiO 2 , the mass ratio of Tianqing glue, CMC and water is 10:10:0.1:0.1:1:100;

[0028] (2) Select a spherical δ-Al with a diameter of 5mm 2 o 3 Place the base material in a sugar-coating machine, spray the glue solution onto the base material in an amount of 13:25 in mass ratio between the glue solution and the base material, then roll in the sugar-coating machine for 3 hours, so that the glue solution is evenly coated on the On the outside of the substrate, a carrier precursor is obtained, and titanium dioxide powder is sprayed on the carrier precursor; wherein, the titanium dioxide powder is 400 mesh anatase titanium dioxide powder;

[0029] (3) After spraying titanium dioxide powder, calcine ...

Embodiment 3

[0031] A TiO 2 A preparation method for a core-shell carrier of the shell, comprising:

[0032] (1) At room temperature, mix silica sol, aluminum sol, titanium sol, squash gum, CMC and water, stir evenly to obtain a glue solution, wherein, in the glue solution, SiO 2 、Al 2 o 3 、TiO 2 , the mass ratio of Tianqing glue, CMC and water is 1:1:1:1:1:100;

[0033] (2) Choose a spherical θ-Al with a diameter of 3mm 2 o 3Place the base material in a sugar coating machine, spray the glue solution onto the base material in an amount of 7:25 in the mass ratio of the glue solution to the base material, and then roll it in the sugar coating machine for 1 hour, so that the glue solution can be evenly coated on the On the outside of the substrate, a carrier precursor is obtained, and titanium dioxide powder is sprayed on the carrier precursor; wherein, the titanium dioxide powder is 300 mesh anatase titanium dioxide powder;

[0034] (3) After spraying titanium dioxide powder, it is ca...

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Abstract

The invention provides a preparation method of a core-shell type carrier using TiO2 as a shell layer. The preparation method comprises the following steps of mixing silicon sol, aluminum sol, titanium sol, sesbania gum, sodium carboxymethylcellulose and water into a glue liquid; coating a substrate with the glue liquid, spraying the titanium dioxide powder onto the exterior of the glue liquid, and roasting. The preparation method has the advantages that the TiO2 powder is uniformly distributed to the substrate surface, the uniformity of the thickness of the TiO2 shell layer is guaranteed, and the permeating of active ingredients onto the substrate is avoided; the mechanical strength of the core-shell type carrier using the TiO2 as the shell layer is obviously enhanced, and can reach 170N per particle.

Description

technical field [0001] The invention relates to the field of catalyst supports, in particular to a TiO 2 The preparation method of the core-shell type carrier which is the shell layer. Background technique [0002] As the chemical industry continues to develop in the direction of environmental protection, energy saving and high efficiency. The performance requirements for catalysts are also constantly increasing. Supported catalysts are widely used for their high catalytic activity and good selectivity. Among them, supported catalysts with noble metals as active components are the most widely used, especially in petrochemical industry, noble metal supported catalysts are widely used in gas purification, raw material hydrogenation, cracking and other processes due to their excellent catalytic performance. The most commonly used method for preparing noble metal-supported catalysts is to directly support the noble metal active components on a carrier with a large specific su...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/12B01J35/08B01J37/02B01J37/08B01J23/42B01D53/86B01D53/46
CPCB01D53/8671B01J21/12B01J23/002B01J23/42B01J37/0018B01J37/0221B01J37/082B01D2257/104B01J35/397B01J35/30B01J35/51
Inventor 李新王春艳成峻青
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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