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Method for preparing modified bentonite for removing sulfide in fume

A bentonite and sulfide technology, applied in chemical instruments and methods, gas treatment, other chemical processes, etc., can solve the problems of insufficient sulfur capacity of desulfurizers, insufficient desulfurization accuracy of desulfurizers, and insufficient desulfurization accuracy.

Pending Publication Date: 2015-02-18
朱忠良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The desulfurization precision of the desulfurizer in CN1067828A is not high enough; the sulfur capacity of the desulfurizer in CN1068356A is not large enough, and the desulfurization precision is not high enough, so it takes two steps to desulfurize to ≤1ppm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of the modified bentonite used to remove sulfides from flue gas, firstly prepare aluminum-based bentonite, mix and stir bentonite and 5wt% aluminum chloride solution, leave to settle, take out the supernatant and keep it for use, and separate the solid and liquid The obtained solid was dried at 180°C, then crushed, and then screened to obtain aluminum-based bentonite; followed by solution polymerization, the aluminum-based bentonite and methacrylate monomer were mixed and dissolved in distilled water, stirred, and the initiator azo Diisobutyronitrile and cross-linking agent formaldehyde solution, continue to stir, and the obtained solid phase is kept at 60-80°C for 1-24 hours; finally, the solid phase is vacuum-dried for 4-6 hours, and modified bentonite is obtained after sieving. Methacrylate accounts for 40wt% of the whole, and aluminum-based bentonite takes up 60wt% of the whole.

Embodiment 2

[0017] The preparation method of the modified bentonite used to remove sulfides from flue gas, firstly prepare aluminum-based bentonite, mix and stir bentonite and 6wt% aluminum chloride solution, let it settle, take out the supernatant and keep it for use, and separate the solid and liquid The obtained solid was dried at 180°C, then crushed, and then screened to obtain aluminum-based bentonite; followed by solution polymerization, the aluminum-based bentonite and methacrylate monomer were mixed and dissolved in distilled water, stirred, and the initiator azo Diisobutyronitrile and cross-linking agent formaldehyde solution, continue to stir, and the obtained solid phase is kept at 60-80°C for 1-24 hours; finally, the solid phase is vacuum-dried for 4-6 hours, and modified bentonite is obtained after sieving. Methacrylate accounts for 45% by weight of the whole, and aluminum-based bentonite accounts for 55% by weight of the whole.

Embodiment 3

[0019] The preparation method of the modified bentonite used to remove sulfides from flue gas, firstly prepare aluminum-based bentonite, mix and stir bentonite and 7wt% aluminum chloride solution, let it settle, take out the supernatant and keep it for use, and separate the solid and liquid The obtained solid was dried at 180°C, then crushed, and then screened to obtain aluminum-based bentonite; followed by solution polymerization, the aluminum-based bentonite and methacrylate monomer were mixed and dissolved in distilled water, stirred, and the initiator azo Diisobutyronitrile and cross-linking agent formaldehyde solution, continue to stir, and the obtained solid phase is kept at 60-80°C for 1-24 hours; finally, the solid phase is vacuum-dried for 4-6 hours, and modified bentonite is obtained after sieving. Methacrylate accounts for 30wt% of the whole, and aluminum-based bentonite takes up 70wt% of the whole.

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PUM

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Abstract

The invention discloses a method for preparing modified bentonite for removing sulfide in fume. The method is characterized by comprising the following steps: firstly, preparing aluminum-based bentonite, namely, mixing and stirring the bentonite with 5-10wt% of an aluminum chloride solution, standing to deposit, taking the supernate for later use, performing solid-liquid separation, drying the obtained solied at 180 DEG C, crushing, and screening, thereby obtaining the aluminum-based bentonite; performing solution polymerization reaction, namely, mixing the aluminum-based bentonite with a metacrylic acid ester monomer, dissolving in distilled water, stirring, adding an initiator azodiisobutyronitrile and a cross-linking agent formaldehyde solution, continuously stirring, and keeping the temperature of the obtained solid phase for 1-24 hours at 60-80 DEG C; finally drying the solid phase for 4-6 hours in vacuum, and screening, thereby obtaining the modified bentonite, wherein the polymetacrylic acid ester accounts for 30-45% of the total weight of the components, and the aluminum-based bentonite accounts for 55-70% of the total weight of the components. The industrial experiment shows that the primary saturation sulfur capacity of the desulfurizing agent is greater than 20%, and the desulfurizing agent has the characteristics of appropriate temperature, wide pressure range, high efficiency, fast reaction speed and high desulfurization efficiency.

Description

technical field [0001] The invention relates to a preparation method of modified bentonite for removing sulfide from flue gas. Background technique [0002] Bentonite has a large reserve in my country and is widely used. It has a large specific surface area, high thermal stability, and good adsorption performance. It is a potential high-efficiency and cheap environmentally friendly adsorbent. However, bentonite also has disadvantages such as large swelling and difficult settlement. , in order to solve the problems of practical application, the preparation of a bentonite water purifier with higher adsorption effect, good settling performance and low price has become a research hotspot. In the prior art, the composite of acrylamide and bentonite is almost all developed as a superabsorbent composite material. The preparation methods of this composite material mainly include solution polymerization, reverse suspension polymerization, and radiation polymerization. ①The solution p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02
CPCB01J20/26B01D53/02B01D2253/202B01D2257/30B01J2220/4812
Inventor 朱忠良
Owner 朱忠良