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Preparation method of titanium silicon composite carbonyl sulfide hydrolysis catalyst

A technology of hydrolysis catalyst and carbonyl sulfide, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of small specific surface area and low mechanical strength, reduce production costs, increase service life, and improve Effect of COS Hydrolysis Reactivity

Active Publication Date: 2019-10-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the industrial application of titania-based hydrolyzing agents is limited due to the disadvantages of small specific surface area and low mechanical strength of titania as a support.

Method used

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  • Preparation method of titanium silicon composite carbonyl sulfide hydrolysis catalyst
  • Preparation method of titanium silicon composite carbonyl sulfide hydrolysis catalyst
  • Preparation method of titanium silicon composite carbonyl sulfide hydrolysis catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as Figure 1a and 1b As shown, the titanium-silicon composite carbonyl sulfide hydrolysis catalyst of the present embodiment is TiO with ordered pores and large specific surface area. 2 / SiO 2 Composite COS hydrolysis catalyst, and the titanium-silicon composite carbonyl sulfide hydrolysis catalyst has a hierarchical pore structure with a combination of macropores, mesopores and micropores. The catalyst passes TiO 2 The combination of the excellent anti-oxidation performance and the cascade pore structure which facilitates the smooth export of the reaction products reflects that the catalyst has high anti-sulfur poisoning performance in an oxygen-containing atmosphere.

[0048] Such as figure 2 , which shows a flow chart of the method for preparing a titanium-silicon composite carbonyl sulfide hydrolysis catalyst according to Embodiment 1 of the present invention. The method includes the following steps:

[0049] (1) Provide soluble titanium salt, soluble sili...

Embodiment 2

[0075] The chemical substances and materials used in the second embodiment of the present invention are: butyl titanate, tetraethyl orthosilicate, monodisperse polystyrene microsphere emulsion, dilute hydrochloric acid, absolute ethanol and distilled water;

[0076] (1) Prepare the solution of titanium oxide precursor

[0077] Measure 37.25mL±0.01mL of butyl titanate and 50mL±0.001mL of absolute ethanol, then put the measured butyl titanate and absolute ethanol in a beaker, stir with a stirrer until completely dissolved, and obtain a concentration of 2mol / L titanium solution, namely the solution of titanium oxide precursor.

[0078] (2) Preparation of silica sol

[0079] Accurately measure 11.8mL±0.01mL of tetraethyl orthosilicate, and measure the corresponding dilute hydrochloric acid, no Water ethanol and distilled water, and mix them, stir to make it completely homogeneous to get silica sol.

[0080] (3) Mix the solution of the titanium oxide precursor prepared above wit...

Embodiment 3

[0088] The chemical materials used in the third embodiment of the present invention are: butyl titanate, tetraethyl orthosilicate, monodisperse polystyrene microsphere emulsion, potassium carbonate, dilute hydrochloric acid, absolute ethanol and distilled water;

[0089] (1) Prepare the solution of titanium oxide precursor

[0090] Measure 37.25mL±0.01mL of butyl titanate and 50mL±0.001mL of absolute ethanol, then put the measured butyl titanate and absolute ethanol in a beaker, stir with a stirrer until completely dissolved, and obtain a concentration of 2mol / L titanium solution, namely the solution of titanium oxide precursor.

[0091] (2) Preparation of silica sol

[0092] Accurately measure 11.8mL±0.01mL of tetraethyl orthosilicate, and measure the corresponding dilute hydrochloric acid, no Water ethanol and distilled water, and mix them, stir to make it completely homogeneous to get silica sol.

[0093] (3) Mix the solution of the titanium oxide precursor prepared abov...

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Abstract

The invention discloses a titanium-silicon composite carbonyl sulfide hydrolysis catalyst and a preparation method thereof, and belongs to the technical field of desulfurization catalysts. The titanium silicon composite carbonyl sulfide hydrolysis catalyst is TiO 2 Based carbonyl sulfide hydrolysis catalyst, wherein the titanium silicon composite carbonyl sulfide hydrolysis catalyst uses polystyrene microspheres as macroporous templates, P123 as mesoporous template agent, soluble titanium salt as catalyst carrier precursor, and soluble silicon as supplement The strong agent precursor uses potassium oxalate coordination solution as the active component precursor. The titanium-silicon composite carbonyl sulfide hydrolysis catalyst and its preparation method provided by the invention are TiO with an ordered pore structure with a large specific surface area. 2 Based on the COS hydrolysis catalyst, it forms a stepped pore structure with a combination of macropores, mesopores and micropores. This catalyst can not only improve the COS hydrolysis reaction activity and titanium oxide's resistance to sulfur poisoning through a large specific surface area, but also has suitable stepped pores to facilitate The reaction products are smoothly exported, further improving the service life of the catalyst.

Description

technical field [0001] The invention relates to the technical field of desulfurization catalysts, in particular to a preparation method of a titanium-silicon composite carbonyl sulfide hydrolysis catalyst. Background technique [0002] In the coal-based industrial raw material gas containing carbonyl sulfide, there is always a trace amount of O 2 exist, and the trace O 2 During the conversion of COS, the hydrolyzate is oxidized to form sulfate, which leads to a decrease in catalyst activity. Due to its unique electronic structure, titanium oxide has the ability to migrate oxygen, thus exhibiting the 2 Good anti-sulfur poisoning performance in the atmosphere, so it becomes an excellent carrier for carbonyl sulfide hydrolysis catalyst. However, the industrial application of titania-based hydrolysis agents is limited due to the disadvantages of small specific surface area and low mechanical strength of titania as a support. Contents of the invention [0003] In order to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J21/08B01J27/232B01D53/86B01D53/48
CPCB01D53/8606B01J21/063B01J21/08B01J27/232B01D2257/308B01J35/64
Inventor 梁丽彤樊惠玲寇佳伟汪建黄冠沈芳上官炬黄伟
Owner TAIYUAN UNIV OF TECH