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Solvent for eliminating H2S from gas mixture

A mixed gas and removal technology, which is applied in the direction of dispersed particle separation, chemical instruments and methods, and separation methods, can solve the problems of low selectivity, high energy consumption, and small absorption capacity, so as to improve selective absorption and reduce heat loss. Consumption, improve the effect of absorption and desorption performance

Inactive Publication Date: 2007-01-03
HUAXI CHEM INST CHENGDU CITY
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AI Technical Summary

Problems solved by technology

[0006] The above patents all use N-methyldiethanolamine as the main component, and add a certain amount of secondary amine or inorganic compound as an activator to improve the absorption or regeneration performance of the solution, but there are still problems such as small absorption capacity, high energy consumption, and selection. issues of low sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] the solution

[0021] The test results show that the absorption capacity and purification degree of the solution are significantly improved by using the solution formula, the consumption of regeneration steam is reduced, the energy consumption is low, and the operation flexibility is large.

Embodiment 2

[0023] A natural gas processing unit, CO in crude natural gas 2 Content about 6% (v%), H 2 S content about 12% (v%), organic sulfur content about 230mg / Nm 3 , The formula of the technical solution is: 30% by weight of N-methyldiethanolamine, 10% by weight of diisopropanolamine, 10% by weight of TBEE, 5% by weight of water, and the remaining components are sulfolane. In the treated natural gas, H 2 S content about 15mg / Nm 3 、Organic sulfur content is less than 150mg / Nm 3 , CO 2 The content is about 2.7% (v%), and the product gas meets the national standard.

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Abstract

The present invention is method of adding one kind of secondary amine and one kind of organic amine with steric effect into water or sulfolane solution of N-methyl diethanolamine to obtain the activator for removing H2S from gas mixture with or without CO2. The present invention provides two solution recipes. The recipe I for the solution suitable for removing H2S from gas mixture containing no or less organic sulfide consists of N-methyl diethanolamine 30-50 wt%, secondary amine 1-10 wt%, steric amine 1-15 wt% and water for the rest. The recipe II for the solution suitable for removing H2S from gas mixture containing organic sulfide consists of N-methyl diethanolamine 30-40 wt%, secondary amine 1-5 wt%, steric amine 1-15 wt%, water 5 wt% and sulfolane for the rest.

Description

Technical field: [0001] The present invention relates to a kind of H from mixed gas 2 The solvent of S belongs to the field of natural gas and petrochemical gas separation. Background technique: [0002] The aqueous solution with N-methyldiethanolamine as the main body is widely used in the desulfurization process of industrial gases. It has the characteristics of large absorption capacity, good selectivity, low regeneration energy consumption, and no corrosion to equipment, so it has a good prospect for popularization and application. . [0003] ZL 93110579.X invented three groups of solutions with different composition formulas: the solution formula suitable for sulfur-free gas is: N-methyldiethanolamine 20-60% by weight, piperazine 1-5% by weight, diethanolamine 1-10% by weight % by weight; there are two groups suitable for sulfur-containing gases: N-methyldiethanolamine 20-60% by weight, N-methyl-ethanolamine 0.1-10% by weight, diethanolamine 1-10% by weight; N-methyld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/52
Inventor 汪志和肖九高王俊昌曾轲
Owner HUAXI CHEM INST CHENGDU CITY
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