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A Composite Desulfurization Auxiliary and Its Application

A desulfurization aid and composite technology, which is applied in the field of preparation and application of composite desulfurization aids, can solve the problem of not considering the influence of the analytical performance of the desulfurizer, the inability to reflect the effect of industrial use, and the removal rate of organic sulfur without removal, etc. The problem is to ensure that repeated analysis and regeneration do not degrade, the economic benefits of the device are significant, and the performance of organic sulfur is outstanding.

Active Publication Date: 2021-01-19
南京万象新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently used alcohol amines are N-methyldiethanolamine (MDEA) or its mixture. This type of desulfurizer generally has the following disadvantages: 1. Only hydrogen sulfide is removed, and organic sulfur is not removed or the removal rate is low. For Gases with high organic sulfur need to add other desulfurization devices
2. The selectivity to hydrogen sulfide removal is poor, and a large amount of carbon dioxide is also removed while removing hydrogen sulfide. For high CO 2 / H 2 The gas with S ratio will increase the processing capacity of subsequent devices and increase the production energy consumption
3. The solution is easy to foam and cause the loss of amine liquid, so the general use concentration is low, which requires a large amount of amine liquid circulation, resulting in high energy consumption of the device
However, it does not consider the influence of desulfurizers on the analytical performance
[0006] To sum up, although the existing MDEA and sterically hindered amine desulfurization solutions have their own characteristics, they are affected by the difference of acid gas in each application environment, so they play a limited role, resulting in the inability to reflect the effect of industrial use

Method used

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  • A Composite Desulfurization Auxiliary and Its Application
  • A Composite Desulfurization Auxiliary and Its Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First add 120g of ionized water, 30g of sodium sulfite, and 20g of thiourea into a three-necked flask, raise the temperature to 80±2°C, keep stirring and dissolve, then cool down to 35±5°C, and then add tert-butylaminoethoxy alcohol ether, tert-butylaminopropoxy 150g of alcohol ether and 30g of 1,5-pentanediol, stirred at room temperature and then filtered to remove impurities to obtain compound desulfurization aid WXT-1.

Embodiment 2

[0026] First add 120g of ionized water, 20g of sodium thiosulfate, and 20g of sodium sulfite into a three-necked flask, heat up to 80°C and stir to dissolve, then cool down to 35±5°C, then add 150g of tert-butylaminopropoxy alcohol ether, tert-butylaminobutyl 100g of oxyalcohol ether, 20g of morpholine, and 70g of 1,5-pentanediol were stirred at room temperature and then filtered to remove impurities to obtain the composite desulfurization aid WXT-2.

Embodiment 3

[0028] First, add 100g of ionized water, 20g of sodium thiosulfate, and 10g of sodium sulfite into a three-necked flask, heat up to 80°C and stir to dissolve, then cool down to 35±5°C, and then add 100g of tert-butylaminoethoxy alcohol ether, tert-butylaminobutyl 200g of oxyalcohol ether, 25g of morpholine, and 45g of 1,5-pentanediol were stirred evenly at room temperature, and then filtered to remove impurities to obtain the composite desulfurization aid WXT-3.

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Abstract

The invention relates to preparation and an application of a compound desulfuration assistant in the technical field of liquid amine desulfuration of natural gas and gas of coal chemical industries, petrochemical industries and the like. The compound desulfuration assistant comprises 50-70wt% of modified hindered amine, 5-10wt% of water-soluble antioxidant, 2-5wt% corrosion inhibitor and 20-40wt%solvent, wherein hindered amine is a mixture of more than two of tert-butylamine ethoxy alcohol ether, tert-butylamine propoxy alcohol ether or tert-butylamine butoxy alcohol ether in any proportion.The appropriate compound desulfuration assistant can be optimized and adopted according to practical problems of acid gas on an application site; the application scope of MDEA (methyldiethanolamine) as a main agent is extended; the assistant can be used for refined removal of hydrogen sulfide and organic sulfur from the natural gas and the acid gas in coal chemical and petrochemical processes; a preparation technology of the compound desulfuration assistant is simple; and the assistant is low in cost and excellent in application effect.

Description

technical field [0001] The invention relates to the preparation and application of a composite desulfurization aid in the technical field of liquid amine desulfurization of petrochemical gases such as natural gas and coal chemical industry. Background technique [0002] Hydrogen sulfide is a colorless, highly toxic, acidic gas with a special smell of rotten eggs. Even low concentrations of hydrogen sulfide are highly irritating and toxic. The petrochemical gas containing hydrogen sulfide will not only corrode pipelines, instruments and equipment, etc., but hydrogen sulfide is highly toxic, and its leakage will seriously threaten personal safety. [0003] At present, there are many methods to deal with hydrogen sulfide at home and abroad, and desulfurization can be divided into dry desulfurization and wet desulfurization according to its weak acidity and strong reducing property. Dry desulfurization is to use the reducibility and flammability of hydrogen sulfide to desulfuri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1456B01D53/1468B01D53/1493B01D2252/20484B01D2252/50B01D2252/60B01D2252/606B01D2256/245
Inventor 黄准
Owner 南京万象新材料科技有限责任公司
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