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Calcium-based ionic liquid for flue gas desulfurization, desulfurizer and preparation method of desulfurizer

A technology of ionic liquid and desulfurizer, applied in the field of comprehensive utilization of resources, can solve the problems of low utilization rate and high viscosity, and achieve the effects of controlling cost, large specific surface area and improving reaction efficiency

Active Publication Date: 2021-06-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art, the object of the present invention is to provide a calcium-based ionic liquid for flue gas desulfurization, a desulfurizer and a preparation method thereof. The calcium-based ionic liquid of the present invention is solid at normal temperature and is convenient for transportation. At the same time, the desulfurizing agent of the present invention also overcomes the problems of high viscosity and low utilization rate of the current ionic liquid used for flue gas desulfurization.

Method used

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  • Calcium-based ionic liquid for flue gas desulfurization, desulfurizer and preparation method of desulfurizer
  • Calcium-based ionic liquid for flue gas desulfurization, desulfurizer and preparation method of desulfurizer
  • Calcium-based ionic liquid for flue gas desulfurization, desulfurizer and preparation method of desulfurizer

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preparation example Construction

[0034] Provide the preparation process of desulfurizing agent of the present invention below, concrete steps comprise:

[0035] Step 1, under the condition of nitrogen protection, calcium chloride CaCl 2 , 1-butyl-3-methylimidazolium chloride salt ionic liquid [Bmin]Cl and ethanol are mixed in a molar ratio (2-4): 4:1 to obtain a mixture A;

[0036] Step 2: Stir the mixture A under the protection of nitrogen gas. The stirring conditions are: 90-95° C., magnetic stirring for 24-36 hours, the mixture A gradually changes from a crystalline state to a uniform liquid state, and a mixture B is obtained.

[0037] Step 3, after the mixture B is centrifuged, the upper layer liquid is taken to stand for stratification, wherein the centrifugation condition is: centrifugation at 3000-4000 r / min for 2-3 minutes.

[0038] Step 4, using a pear-shaped separating funnel to separate the water phase and the ionic liquid phase, further removing the water phase, and drying to obtain a calcium-bas...

Embodiment 1

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] refer to figure 1 The method for preparing a desulfurizing agent for flue gas desulfurization in this embodiment includes the following steps:

[0045] Step 1, raw material pretreatment, take an appropriate amount of activated carbon and wash it 3 times, put it into a pulverizer after drying, and pass through a 40-60 mesh sieve to obtain activated carbon particles with the required particle size;

[0046] Step 2, N 2 Under protective conditions, calcium chloride CaCl was added to the three-necked flask at a molar ratio of 4:4:1 2 , 1-butyl-3-methylimidazolium chloride salt ionic liquid [Bmin]Cl and ethanol. The three-necked flask was placed in a magnetically stirred water bath, and stirred continuously at 90°C for 36h.

[0047] Step 3, after centrifuging the liquid mixture at 3000r / min for 3min, using a pear-shaped separating funne...

Embodiment 2

[0053] The method for preparing a desulfurizing agent for flue gas desulfurization in this embodiment comprises the following steps:

[0054] Step 1, raw material pretreatment, take an appropriate amount of activated carbon and wash it 3 times, put it into a pulverizer after drying, and pass through a 40-60 mesh sieve to obtain activated carbon particles with the required particle size;

[0055] Step 2, N 2 Under protective conditions, calcium chloride CaCl was added to the three-necked flask in a molar ratio of 3:4:1 2 , 1-butyl-3-methylimidazolium chloride salt ionic liquid [Bmin]Cl and ethanol. The three-necked flask was placed in a magnetic stirring water bath, and the stirring was continued for 28 h at 92 °C.

[0056] Step 3, after centrifuging the liquid mixture at 4000r / min for 2min, using a pear-shaped separating funnel to separate the water phase and the ionic liquid phase, removing the water phase, and vacuum-drying at 100°C for 9h to obtain calcium for flue gas de...

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Abstract

The invention discloses a calcium-based ionic liquid for flue gas desulfurization, a desulfurizer and a preparation method of the desulfurizer. The calcium-based ionic liquid for flue gas desulfurization is prepared from 1-butyl-3-methylimidazolium chloride ionic liquid, calcium chloride and a volatile solvent through a stirring reaction, centrifugal separation and drying. The desulfurizer for flue gas desulfurization is prepared from activated carbon and the calcium-based ionic liquid for flue gas desulfurization through a pressure impregnation method. The calcium-based ionic liquid is in a solid state at normal temperature and is convenient to transport; and meanwhile, the desulfurizer also overcomes the problems that existing ionic liquid for flue gas desulfurization is relatively high in viscosity and low in utilization rate during use.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of resources, and relates to a calcium-based ionic liquid for flue gas desulfurization, a desulfurizer and a preparation method thereof. Background technique [0002] The control of smelting flue gas has always been one of the environmental issues that people pay close attention to. Among them, the control of high concentration sulfur dioxide has achieved many considerable results. At the same time, part of the low-concentration sulfur dioxide produced in the smelting process with a concentration of 0.1% to 6% has the characteristics of low concentration and large fluctuations. Long-term concentrated discharge will still cause serious pollution to the environment. In recent years, many researchers have introduced some metal ions into the structure of ionic liquids, such as Mn 2+ , Fe 3+ 、Cu 2+ , Zn 2+ etc., to obtain metal-based ionic liquids for the treatment of low-concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/50
CPCB01D53/79B01D53/50B01D2258/0283
Inventor 田宇红赵丽蓉李林波刘佰龙兰新哲
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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