An Absorbent for Efficiently Removing Organic Sulfur in Acidic Mixed Gas

A technology of absorbent and mixed gas, which is applied to gas treatment, separation methods, and separation of dispersed particles. It can solve the problems of high total consumption index, lengthy process, and large investment, and achieve small circulation, low energy consumption, and acid gas The effect of heavy load

Active Publication Date: 2021-11-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for highly acidic natural gas with high organic sulfur content and complex composition, it is still necessary to remove the remaining organic sulfur such as mercaptans and carbonyl sulfide through alkali washing, catalytic oxidation or catalytic hydrolysis. High consumption index

Method used

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  • An Absorbent for Efficiently Removing Organic Sulfur in Acidic Mixed Gas
  • An Absorbent for Efficiently Removing Organic Sulfur in Acidic Mixed Gas
  • An Absorbent for Efficiently Removing Organic Sulfur in Acidic Mixed Gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Composition of raw material gas to be treated: hydrogen sulfide ~8% (mol), carbon dioxide ~7% (mol), methyl mercaptan ~400mg / Nm 3 , carbonyl sulfide~500mg / Nm 3 , The absorbent circulation is 5L / h.

[0019] The absorbent adopts formula 1#.

[0020] The absorption pressure in this implementation case is 4.0MPa, and the composition of the purified gas after treatment is as follows:

[0021]

Embodiment 2

[0023] Composition of raw material gas to be treated: hydrogen sulfide ~8% (mol), carbon dioxide ~7% (mol), methyl mercaptan ~400mg / Nm 3 , carbonyl sulfide~500mg / Nm 3 , The absorbent circulation is 5L / h.

[0024] The absorbent adopts formula 2#

[0025] The absorption pressure in this implementation case is 4.0MPa, and the composition of the purified gas after treatment is as follows:

[0026]

Embodiment 3

[0028] Composition of raw material gas to be treated: hydrogen sulfide ~8% (mol), carbon dioxide ~7% (mol), methyl mercaptan ~400mg / Nm 3 , carbonyl sulfide~500mg / Nm 3 , The absorbent circulation is 5L / h.

[0029] The absorbent adopts formula 3#.

[0030] The absorption pressure in this implementation case is 8.1MPa, and the composition of the purified gas after treatment is as follows:

[0031]

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Abstract

The invention relates to an absorbent for efficiently removing organic sulfur in acidic gas mixture, which is suitable for efficiently removing organic sulfur such as carbonyl sulfide and mercaptan in acid gas flow, and belongs to the field of gas purification. It is characterized in that the absorbent contains N-methyldiethanolamine, monoethanolamine, N,N-dimethylformamide, water and additive sodium isethionate. Among them, the concentration of N-methyldiethanolamine is 30-50% (wt), the concentration of monoethanolamine is 10-15% (wt), the concentration of N,N-dimethylformamide is 5-10% (wt), and the additive hydroxyethyl Sodium sulfonate is 0~5% (wt), and the balance is water. This kind of absorbent has the characteristics of good performance and large acid gas load.

Description

technical field [0001] The invention belongs to the field of gas purification, and relates to an absorbent for efficiently removing organic sulfur in acidic mixed gas. Background technique [0002] In the acid gas purification process, the alcohol amine method is the most widely used. The alcohol amine method has the characteristics of simple process operation and high removal efficiency of acid gas. The alcohol amines used in the alcohol amine process include monoethanolamine, diethanolamine, triethanolamine, diisopropanolamine, N-methyldiethanolamine, etc. Among them, N-methyldiethanolamine has gradually replaced other alcoholamines due to its good absorption selectivity, low regeneration energy consumption, and low solvent loss rate. [0003] The N-methyldiethanolamine process is a desulfurization solvent developed by the American Flour company in the early years. N-methyldiethanolamine is used in the removal of high-concentration H 2 S and CO 2 H in the petroleum gas ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1487B01D53/1493B01D2252/20484B01D2252/20489B01D2252/2053B01D2252/2056B01D2252/504B01D2257/304B01D2257/306
Inventor 杨绪甲毛松柏
Owner CHINA PETROLEUM & CHEM CORP
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