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Method for enhancing desulfurization effects of iron-based ionic liquid

An iron-based ionic liquid and liquid technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of weakening Fe-IL acidity, high viscosity, and low activity.

Pending Publication Date: 2018-12-25
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

In addition, Fe-IL is acidic and has a high viscosity, resulting in its Fe 3+ The activity of Fe-IL is not high, so that the actual sulfur capacity is much smaller than the theoretical sulfur capacity, so in the prior art, the method of introducing weakly acidic or alkaline organic solvents is used to weaken the acidity of Fe-IL

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  • Method for enhancing desulfurization effects of iron-based ionic liquid
  • Method for enhancing desulfurization effects of iron-based ionic liquid
  • Method for enhancing desulfurization effects of iron-based ionic liquid

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Embodiment

[0029] A method for improving the desulfurization effect of iron-based ionic liquids, comprising the following steps:

[0030] Step (1), adopt the following steps to configure iron-based ionic liquid:

[0031] Step (1.1): put 1-methylimidazole and n-chlorobutane into a three-neck flask according to the mass ratio of 1:2, and stir in a constant temperature water bath at 70°C for 48 hours to obtain a reaction solution;

[0032] Step (1.2): Pour the reaction solution into a separatory funnel for separation, remove the yellow liquid in the lower layer, add an equal volume of ethyl acetate to wash for 3 times, and remove impurities in the reaction solution;

[0033] Step (1.3): Separate the liquid again to obtain the lower layer liquid, and then remove the ethyl acetate by distillation under reduced pressure at a constant temperature of 90°C with a rotary evaporator, and the obtained light yellow liquid is the intermediate product [Bmim]Cl;

[0034] Step (1.4): Mix the intermediat...

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Abstract

The invention discloses a method for enhancing desulfurization effects of iron-based ionic liquid. The method includes steps of sequentially adding alkaline organic solvents and water into the iron-based ionic liquid to form desulfurizing liquid; filling the desulfurizing liquid with H2S gas and desulfurizing the H2S gas. The method has the obvious advantages that the water is actively led into 'Fe-IL + NMP (Fe-ionic liquid + N-methyl pyrrolidone' desulfurizing systems, accordingly, the desulfurization effects and the desulfurization efficiency can be enhanced, the iron-based ionic liquid canbe recycled after being regenerated, and the method is free of environmental pollution.

Description

technical field [0001] The invention relates to the field of liquid-phase catalytic oxidation of hydrogen sulfide, and relates to a method for improving the desulfurization effect of an iron-based ionic liquid. Background technique [0002] The purification and desulfurization technology of sour natural gas generally adopts two kinds of dry method and wet method. The dry desulfurization process is relatively simple and stable, and the desulfurization accuracy is high, but its sulfur capacity is small, and it is only suitable for low concentration H 2 S treatment, and the desulfurization agent is easily sintered due to the influence of desulfurization conditions, regeneration is also difficult, and the desulfurization agent needs to be replaced regularly; wet desulfurization can not only desulfurize under the condition of relatively high acid gas load, but also has a wide range of applications, and the operation stability is not easily affected. Desulfurization conditions ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/52B01J31/02
CPCB01D53/8612B01J31/0281
Inventor 邱奎张同语陈磊牛世豪
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY