Titanium dioxide catalyst with high strength and large specific surface area for sulfur recovery and preparation method thereof

A technology for the recovery of titanium dioxide and sulfur, which is used in physical/chemical process catalysts, chemical instruments and methods, and sulfur preparation/purification. It can solve the problems of low crushing strength and small specific surface area, and achieve high crushing strength. The effect of large surface area and high reactivity

Inactive Publication Date: 2020-06-16
山东骏飞环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the technical problem of small specific surface area and low crushing strength of titanium dioxide catalyst for sulfur recovery

Method used

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  • Titanium dioxide catalyst with high strength and large specific surface area for sulfur recovery and preparation method thereof
  • Titanium dioxide catalyst with high strength and large specific surface area for sulfur recovery and preparation method thereof

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Experimental program
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Embodiment 1

[0034] Raw material: wet metatitanic acid (dry TiO 2 Content ≥90wt%, water content 4 2- content <2wt%), alumina dry rubber powder and sesame powder as raw materials.

[0035] Preparation:

[0036] Mix the raw material wet metatitanic acid with alumina dry rubber powder and sesame powder in proportion, and roll for 20 minutes. Add a certain amount of water, organic acid and nitric acid to the rolled material, and continue rolling for 30 Minutes, moisturizing and aging for 20 minutes;

[0037] The material obtained by moisturizing and aging is added to the automatic pressing and extruding machine, and the clover template is selected for extruding. The extrudate is dried in a drying box to remove water. The temperature of the drying box is 100℃, the drying time is 2 hours, and then it passes through the muffle furnace. Calcination, the calcination temperature is 400 ℃, the calcination time is 4 hours to obtain the clover-shaped titanium dioxide catalyst, TiO 2 Content ≥85wt%, Al 2 O 3 ...

Embodiment 2

[0039] Raw material: wet metatitanic acid (dry TiO 2 Content ≥90wt%, water content 4 2- content <2wt%), alumina dry rubber powder and sesame powder as raw materials.

[0040] Preparation:

[0041] Mix the raw material wet metatitanic acid with alumina dry rubber powder and sesame powder in proportion, and roll for 20 minutes. Add a certain amount of water, organic acid and nitric acid to the rolled material, and continue rolling for 30 Minutes, moisturizing and aging for 20 minutes;

[0042] The material obtained by moisturizing and aging is added to the automatic pressing and extruding machine, and the four-leaf clover template is selected for extruding. The extrudate is dried in a drying box to remove moisture. The temperature of the drying box is 100℃, and the drying time is 2 hours. The calcination temperature is 400℃ and the calcination time is 4 hours to obtain the four-leaf clover-shaped titanium dioxide catalyst, TiO 2 Content ≥85wt%, Al 2 O 3 The content is ≥10wt%.

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Abstract

The invention discloses a high-strength large-specific-surface-area titanium dioxide catalyst for sulfur recovery and a preparation method thereof, and belongs to the technical field of catalysts andpreparation thereof. The preparation method comprises the following steps: firstly, mixing wet metatitanic acid serving as a raw material with alumina dry glue powder and sesbania powder in proportion, rolling for a period of time, adding a certain amount of mixed solution of water, organic acid and nitric acid into the rolled materials, continuously rolling, preserving moisture and ageing; and adding the material obtained by moisturizing and aging into an automatic pressing and banded extruder, selecting a clover template/four-leaf clover template for band extrusion, drying the extrudate through a drying oven to remove water, and roasting through a muffle furnace to obtain the product. The wet metatitanic acid is selected as a raw material of the catalyst, and compared with a dry raw material, the wet metatitanic acid is stable in chemical property and large in number of active centers; the catalyst is in a clover/clover shape, and compared with a cylinder in the prior art, the crushing strength and the specific surface area of the catalyst are both improved.

Description

Technical field [0001] The invention belongs to the technical field of catalysts and their preparation, and specifically relates to a titanium dioxide catalyst for sulfur recovery and a preparation method thereof. Background technique [0002] A large amount of H-containing gas is generated in the process of petroleum refining, natural gas processing and coal chemical industry. 2 S acid gas. In order to protect the environment and recover elemental sulfur, the Claus sulfur recovery process is commonly used in the industry to treat such acid gases. In the sulfur recovery process, in the high temperature thermal reaction stage in the combustion furnace, about 65 to 70% of H 2 S is converted into elemental sulfur, and the remaining part must be converted into elemental sulfur as much as possible under the action of the catalyst in the low-temperature catalytic reactor. The early Claus sulfur recovery unit used natural bauxite as a catalyst, and the sulfur yield was only 80-85%. Lat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/02B01J35/10C01B17/04
CPCB01J21/063B01J35/002B01J35/026B01J35/1019C01B17/0434
Inventor 李士彦李炳辉张庆安刘玉法
Owner 山东骏飞环保科技有限公司
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