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Regeneratable load type desulfurizing agent and preparation method thereof

A supported, desulfurizing agent technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., to achieve the effects of simple preparation process, easy regeneration, and good selectivity

Inactive Publication Date: 2008-05-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application 200510073345.0 discloses a method of using amino acid ionic liquids for acid gas absorption, which involves loading amino acid ionic liquids on silica gel for acid gas absorption, but there is no loading of other types of ions that have the function of absorbing sulfur dioxide Liquid is used as a desulfurization agent, and there is no report of loading an ionic polymer with sulfur dioxide absorption function as a desulfurization agent.

Method used

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  • Regeneratable load type desulfurizing agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Measure 1.5 grams of tetramethylguanidine lactate (TMGL for short) ionic liquid, add 10 milliliters of methanol, and mix well; 2 / g) Immerse in TMGL / methanol solution, stir to make it fully contact with the solution; then, volatilize at room temperature (about 30°C) for 1 hour, the silica gel is slurry; then heat the temperature to 45°C, volatilize for 4 hours At this time, the silica gel becomes powdery particles again; finally, the sample is heated in an oven at 80°C for 12 hours to fully remove methanol and possible moisture to obtain a silica gel desulfurizer loaded with TMGL. In the obtained desulfurizing agent, the mass ratio of TMGL to silica gel carrier is 0.5:1.

Embodiment 2

[0037] Measure 3 grams of tetramethylguanidine acrylate (abbreviated as TMGA) ionic liquid, add 10 milliliters of ethanol, mix well; immerse 3 grams of dry silica gel in the obtained solution, stir, make it fully contact with the solution; then, at room temperature ( Volatilize at about 30°C for 0.5 hours, and the silica gel is in the form of a slurry; then heat the temperature to 50°C and treat for 4 hours to make the solvent volatilize, at this time the silica gel becomes powdery particles again; finally put the sample into an oven at 80°C Heated for 12 hours to fully remove methanol and possible moisture to obtain a loaded desulfurizer loaded with TMGA ionic liquid. In the obtained desulfurizing agent, the mass ratio of TMGA to the silica gel carrier is 1:1. The infrared absorption spectra of silica gel, TMGA / silica gel desulfurizer and TMGA / silica gel desulfurizer after absorbing sulfur dioxide are shown in Figure 1.

Embodiment 3

[0039] Measure 3 grams of tetramethylguanidine acrylate (TMGA for short) ionic liquid and 0.01 gram of ammonium persulfate, add 10 milliliters of ethanol, and mix well; immerse 3 grams of dry silica gel in the resulting solution, stir to make it fully contact with the solution ; Then, volatilize at room temperature (about 30°C) for 0.5 hours, and the silica gel is in the form of a slurry; then heat the temperature to 50°C, and treat for 4 hours, while the solvent volatilizes and TMGA polymerizes, at this time the silica gel becomes powdery particles again Finally, put the sample into an oven at 80°C and heat it for 12 hours to fully remove methanol and possible moisture, and further polymerize TMGA to obtain a silica gel desulfurizer loaded with TMGA linear ionic polymer (PTMGA for short). In the obtained desulfurizing agent, the mass ratio of TMGA to the silica gel carrier is 1:1.

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Abstract

The invention discloses a reproducible supported desulfurizer and a preparation method. Following procedures are included: 1) a solution is obtained by adding ionic liquid, polymerizable ionic liquid and initiator, or polymerizable ionic liquid, initiator, and crosslinked monomer into water, methanol, or ethanol solvent; a dosage of the initiator is 0.05-2wt% of that of the polymerizable ionic liquid; a dosage of the crosslinked monomer is 0.5-3wt% of that of the polymerizable ionic liquid; 2) polyporous solid load material is immersed into the solution obtained in procedure 1), and is stirred, with the mass ratio of the ionic liquid to the polyporous solid load material is 0.2:1-2:1, and then the material is volatilized at the room temperature for 0.5 to 1 hour, processed at the temperature of 40 to 60 DEG C for 0.5 to 4 hours, then processed at the temperature of 60 to 100 DEG C for 6 to 12 hours. The desulfurizer has the advantages that the absorbing speed is high; the selectivity is good; the absorbing capacity is high; the regeneration is easy, and can be repeatedly used in circulation; the mechanical intensity is high, and the mechanical intensity and absorption property can not be influenced after certain amount of water vapor is absorbed; the tolerance temperature for desorption is high; the preparation technique is simple; scale production is suitable.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a renewable loaded desulfurizer and a preparation method thereof. Background technique [0002] Air pollution is one of the major environmental problems faced by human beings, especially SO 2 pollution is the most serious. It not only causes respiratory diseases, but also causes acid rain and destroys the ecological environment. my country SO 2 The emission ranks first in the world, and the solution to SO 2 Pollution is particularly pressing. [0003] To fundamentally solve SO 2 In order to solve the problem of air pollution such as industrial waste gas and automobile exhaust gas, desulfurization and other treatment must be carried out before discharge to eliminate pollutants or reduce their concentration to below the allowable value. Gas desulfurization technology has a development history of about 70 years, and the desulfurization process is becoming more a...

Claims

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Application Information

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IPC IPC(8): B01D53/50
Inventor 李伯耿张正敏吴林波朱世平
Owner ZHEJIANG UNIV
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