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MgAl2O4 base intermediate-temperature carbonyl sulfide hydrolysis catalyst and preparation method thereof

A hydrolysis catalyst, spar-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as deficiencies, resistance to oxygen and sulfur poisoning, achieve stable medium temperature activity, reasonable design, and improve resistance The effect of oxygen sulfur poisoning properties

Active Publication Date: 2018-11-06
SHANXI PULI ENVIRONMENT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, no matter the improvement in the process or the preparation of the catalyst so far, the COS hydrolysis removal purification technology, especially in the resistance to oxygen and sulfur poisoning under medium temperature conditions, still has obvious deficiencies.

Method used

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  • MgAl2O4 base intermediate-temperature carbonyl sulfide hydrolysis catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of magnesia-aluminum spinel-based medium-temperature carbonyl sulfide hydrolysis catalyst is as follows:

[0023] (1), 43.07wt.% magnesium carbonate and 56.93wt.% pseudo-boehmite mechanically and uniformly mixed samples were placed in a crucible, and the crucible containing the samples was placed in a muffle furnace at 1000°C in air Roasting in the atmosphere for 4h, the magnesium aluminum spinel (MgAl 2 o 4 )sample;

[0024] (2), the 71wt.% MgAl prepared above 2 o 4 , 15wt.%K 2 CO 3 , 14wt.% TiO 2 After mixing evenly, add an appropriate amount of distilled water, knead, and extrude at room temperature;

[0025] (3) Place the prepared molded sample in an oven and dry it at 120°C for 2 hours;

[0026] (4) Pour the dried sample into a crucible, put the crucible containing the sample into a muffle furnace, and roast it in an air atmosphere at 600°C for 4 hours to obtain a catalyst sample. The MgAl in the catalyst sample 2 o 4 71wt.%, ...

Embodiment 2

[0029] A kind of preparation method of magnesia-aluminum spinel-based medium-temperature carbonyl sulfide hydrolysis catalyst is as follows:

[0030] (1), 43.07wt.% magnesium carbonate and 56.93wt.% pseudo-boehmite mechanically and uniformly mixed samples were placed in a crucible, and the crucible containing the samples was placed in a muffle furnace at 1000°C in air Roasting in the atmosphere for 4h, the magnesium aluminum spinel (MgAl 2 o 4 )sample;

[0031] (2), the 71wt.% MgAl prepared above 2 o 4 , 14wt.% K 2 CO 3 , 15wt.% TiO 2 After mixing evenly, add an appropriate amount of distilled water, knead, and extrude at room temperature;

[0032] (3) Place the prepared molded sample in an oven and dry it at 120°C for 2 hours;

[0033](4) Pour the dried sample into a crucible, put the crucible containing the sample into a muffle furnace, and roast it in an air atmosphere at 600°C for 4 hours to obtain a catalyst sample. The MgAl in the catalyst sample 2 o 4 71wt.%, ...

Embodiment 3

[0036] A kind of preparation method of magnesia-aluminum spinel-based medium-temperature carbonyl sulfide hydrolysis catalyst is as follows:

[0037] (1), 43.07wt.% magnesium carbonate and 56.93wt.% pseudo-boehmite mechanically and uniformly mixed samples were placed in a crucible, and the crucible containing the samples was placed in a muffle furnace at 1000°C in air Roasting in the atmosphere for 4h, the magnesium aluminum spinel (MgAl 2 o 4 )sample;

[0038] (2), the 85wt.% MgAl prepared above 2 o 4 , 10wt.% K 2 CO 3 , 5wt.% TiO 2 After mixing evenly, add an appropriate amount of distilled water, knead, and extrude at room temperature;

[0039] (3) Place the prepared molded sample in an oven and dry it at 120°C for 2 hours;

[0040] (4) Pour the dried sample into a crucible, put the crucible containing the sample into a muffle furnace, and roast it in an air atmosphere at 600°C for 4 hours to obtain a catalyst sample. The MgAl in the catalyst sample 2 o 4 85wt.%, ...

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Abstract

The invention discloses an MgAl2O4 base intermediate-temperature carbonyl sulfide hydrolysis catalyst and a preparation method thereof. MgAl2O4 is taken as a carrier, potassium carbonate is taken as hydrolysis conversion carbonyl sulfide active component raw materials, and titanium dioxide is taken as a modifier component raw material; all above raw materials are evenly mixed with a dry blending method; obtained mixture is subjected to low-temperature drying and high-temperature activation to prepare the catalyst with intermediate-temperature carbonyl sulfide hydrolysis ability after being extruded into strips and formed, wherein the carrier ingredient of the catalyst is 71-85wt% of MgAl2O4, the hydrolysis conversion carbonyl sulfide active component of the catalyst is of 5-15wt% of potassium carbonate (K2CO3), and the modification component of the catalyst is 5-15wt% of titanium dioxide (TiO2). Under a situation that trace oxygen is in the presence in raw material gas, carbonyl sulfide can be subjected to hydrolysis conversion, so that a phenomenon of the catalyst that hydrolysis activity is quickly lowered due to the oxygen poisoning of carrier components hydrolyzed by the carbonyl sulfide at an intermediate temperature can be avoided.

Description

technical field [0001] The invention belongs to the field of medium-temperature gas purification and catalyst preparation, and specifically relates to a magnesium-aluminum spinel-based medium-temperature carbonyl sulfide hydrolysis catalyst and a preparation method, which are applied to the clean transformation and utilization of fossil raw materials. Background technique [0002] Carbonyl sulfide (COS), as the main form of organic sulfur, widely exists in chemical production raw materials prepared from fossil raw materials such as coal, natural gas and petroleum. The existence of COS will cause catalyst poisoning and deactivation in the subsequent production process, production equipment and instrument corrosion; in addition, if it is discharged into the atmosphere without treatment, COS will react with oxygen to form SO 2 , promote photochemical reactions, pollute the environment, and endanger human health. COS due to chemical properties than H 2 S is inactive, and its a...

Claims

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Application Information

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IPC IPC(8): B01J23/04B01D53/86B01D53/48
CPCB01D53/8606B01D2257/308B01J23/005B01J23/04
Inventor 上官炬刘艳霞梁丽彤寇佳伟沈芳樊惠玲秦志峰苗茂谦
Owner SHANXI PULI ENVIRONMENT ENG CO LTD
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