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Solid porous desulfurization adsorbent and preparation method thereof

An adsorbent and solid-state technology, which is applied in the field of solid-state porous desulfurization adsorbent and its preparation, can solve the problems of low active organic amine content, unfavorable sulfur dioxide, and low adsorption capacity, and achieve high porosity, low desorption cost, and high adsorption capacity. high effect

Pending Publication Date: 2022-07-05
浙江跃维新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, because its carrier is inert silica or straw, it does not participate in the adsorption of sulfur dioxide itself, and its content is often higher than 50%, so the content of active organic amine in the adsorbent is low, and the adsorption capacity is low, which is not conducive to the high efficiency of sulfur dioxide. , low-cost adsorption

Method used

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  • Solid porous desulfurization adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] S1) 10 grams of polyethyleneimine with a molecular weight of 25,000, 2 grams of ethylene glycol diglycidyl ether, 0.05 grams of tea polyphenols, 5 grams of ethanol, and 82.95 grams of water are mixed and stirred to form a dispersion. The dispersion was poured into stainless steel containers and frozen at -20°C. After standing and reacting for 12 hours, the frozen gel was thawed at room temperature to obtain a cross-linked gel, and then the gel was dried in an oven at 100 ° C to obtain a block-shaped porous material, and the block-shaped polyamine porous material was obtained. The material is mechanically processed into granules.

[0039] S2) The above-mentioned granular polyamine porous material is methylated with formaldehyde and formic acid under nitrogen protection, wherein the molar ratio of active hydrogen, formaldehyde and formic acid of the polyamine is 1:1.2:1.6. The reaction temperature under reflux was 120°C, and the reaction time was 12 hours. After the rea...

Embodiment 2

[0044] S1) 8 grams of polyethyleneimine with a molecular weight of 750,000, 2 grams of glycerol triglycidyl ether, 0.1 grams of hydroquinone, 10 grams of ethanol, and 79.9 grams of water are mixed and stirred to form a dispersion. The dispersion was poured into stainless steel containers and frozen at -20°C. After standing and reacting for 12 hours, the frozen gel was thawed at room temperature to obtain a cross-linked gel, and then the gel was dried in an oven at 100 ° C to obtain a block-shaped porous material, and the block-shaped polyamine porous material was obtained. The material is mechanically processed into granules.

[0045] S2) methylating the above-mentioned granular polyamine porous material with propylene oxide, wherein the molar ratio of the active hydrogen of the polyamine to propylene oxide is 1:1.05. The granular porous material is dispersed in 10 times the mass of ethanol, propylene oxide is added under stirring, and the stirring is continued for 4 hours to...

Embodiment 3

[0047] S1) 25 grams of pentaethylenehexamine and propylene oxide with a molar ratio of 1:5 were dissolved in 75 grams of water, and stirred continuously for 4 hours at 25°C to complete the tertiary amination reaction of part of primary and secondary amines.

[0048] S2) Add 6.64 grams of epichlorohydrin, 2.87 grams of sodium hydroxide, 121 grams of water to the above solution, mix well to prepare a dispersion; pour the dispersion into a stainless steel container, and place it in a -20°C environment for freezing. The reaction was left to stand for 24 hours to complete the tertiary amination of most of the primary and secondary amines, and then the frozen gel was thawed at 50 °C, the gel was pulverized, and washed with water to remove the sodium chloride generated by the reaction; then It was dried in an oven at 100°C to obtain a porous tertiary amine adsorption material. Amino content is about 8mol / kg, at 10000ppmSO 2 , 50%RH, 20℃, its saturated adsorption capacity is 3.1mol / k...

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Abstract

The invention discloses a solid porous desulfurization adsorbent and a preparation method thereof. The main component of the solid porous desulfurization adsorbent is a solid porous cross-linked polytertiary amine compound. The preparation method mainly comprises the steps of cross-linking curing and tertiary amination reaction of polyamines. The prepared porous tertiary amine adsorption material can be used for high-efficiency adsorption of sulfur dioxide, and the adsorbent can be recycled through heating regeneration. The adsorption material disclosed by the invention is simple in preparation process, low in equipment requirement, low in production cost, safe, environment-friendly and wide in application range; any other solid porous carrier is not needed, the amino loading capacity is high, and the adsorption capacity is high; during regeneration, cross-linked amines do not volatilize, the loss is small, and the thermal stability is good; the adsorption / desorption of sulfur dioxide is reversible, the regeneration temperature is low, and the cycling stability is good.

Description

technical field [0001] The invention relates to a solid porous desulfurization adsorbent and a preparation method thereof, belonging to the technical field of adsorption materials. Background technique [0002] The burning of fossil fuels, especially coal, emits large amounts of sulfur dioxide gas into the atmosphere. When excessive sulfur dioxide emissions exceed the self-cleaning ability of the environment, acid rain will form, which will not only affect the environment, but also seriously endanger people's health, causing symptoms such as asthma, dry cough, headache, and allergies to the eyes, nose, and throat. [0003] At present, the flue gas desulfurization technology mainly adopts the limestone / gypsum wet desulfurization process. This method has the advantages of mature technology, simple operation, high desulfurization efficiency, and stable system operation. question. [0004] Organic amine desulfurization technology is another kind of more effective desulfurizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01D53/02B01J20/30
CPCB01J20/267B01D53/02B01D2257/302
Inventor 李银勇
Owner 浙江跃维新材料科技有限公司