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Modified multi-amino macroporous resin, preparation method and crylic acid production waste gas treatment method

A macroporous resin and polyamino technology, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of weak intermolecular force, no polar groups, poor adsorption effect, etc., and achieve strong affinity , wide application range and stable performance

Active Publication Date: 2019-01-04
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies existing in the prior art, one of the purposes of the present invention is to provide a modified polyamino macroporous resin and a preparation method thereof, which overcomes the fact that ordinary polystyrene macroporous resins do not contain polar groups For polar substances, weak intermolecular forces lead to defects such as small adsorption capacity and poor adsorption effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of modified polyamino macroporous resin, the steps are:

[0049] a) Add deionized water to the reactor equipped with stirring, thermometer, and reflux condenser, at 150 ~

[0050] Heating to 65 DEG C under the stirring speed of 200 rpm, adding pre-swollen gelatin, after the gelatin dissolves, adding a concentration of 10wt% polyvinyl alcohol aqueous solution and mixing evenly, this system is the water phase (water, gelatin, polyvinyl alcohol) Mass ratio 50:0.3:0.6). Keep the speed of stirring in the reactor and the reaction temperature constant, the oil phase (22wt% styrene solution of divinylbenzene, vinylaniline of 2.5 times of divinylbenzene solution quality, 2 times of divinylbenzene solution quality Add cyclohexane and divinylbenzene solution (0.8% azobisisobutyronitrile) into the water phase (water-to-oil mass ratio 8:1), adjust the stirring speed to 200-300 rpm to disperse the oil phase to 1 ~2mm oil beads, raise the reaction temperature to...

Embodiment 2

[0055] A preparation method of modified polyamino macroporous resin, the steps are:

[0056] a) Add deionized water to the reactor equipped with stirring, thermometer, and reflux condenser, heat to 85°C at a stirring speed of 150-200 rpm, add pre-swelled gelatin, and when the gelatin dissolves, add the concentration of The aqueous solution of 10wt% polyvinyl alcohol is mixed evenly, and this system is the water phase (the mass ratio of water to gelatin and polyvinyl alcohol is 50:0.8:0.5). Keep the speed of stirring in the reactor and the reaction temperature constant, prepare the oil phase (22wt% styrene solution of divinylbenzene, vinylaniline of 1 times the quality of divinylbenzene solution, 0.8 times of the quality of divinylbenzene solution) Add cyclohexane and divinylbenzene solution (1.0% azobisisobutyronitrile) into the water phase (water-to-oil mass ratio 12:1), adjust the stirring speed to 200-300 rpm to disperse the oil phase to 1-300 rpm. 2 mm oil beads, the reac...

Embodiment 3

[0060] A preparation method of modified polyamino macroporous resin, the steps are:

[0061] a) Add deionized water to the reactor equipped with stirring, thermometer, and reflux condenser, heat to 65°C at a stirring speed of 150-200 rpm, add pre-swollen gelatin, and add 10wt% after the gelatin dissolves Aqueous solution of polyvinyl alcohol, mix well, this system is water phase (mass ratio 50:0.2:0.6). Keep the speed of stirring in the reactor and the reaction temperature constant, the oil phase (25wt% styrene solution of divinylbenzene, vinylaniline of 3 times of divinylbenzene solution quality, 2.3 times of divinylbenzene solution quality Add cyclohexane and divinylbenzene solution (1.2% benzoyl peroxide) to the water phase (water-oil mass ratio 5:1), adjust the stirring speed to 200-300 rpm to disperse the oil phase into 1-2 mm oil Beads, the reaction temperature was raised to 90.0°C at 2.0°C / min for 12 hours until the oil beads solidified. After the reaction, it was was...

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Abstract

The invention discloses modified multi-amino macroporous resin, a preparation method and a crylic acid production waste gas treatment method. The modified resin is the amino modified macroporous resin, and compared with common macroporous resin, the modified multi-amino macroporous resin has the better adsorbing effect on acrolein due to the special acting force between amino molecules and carbonyl hydrogen molecules and is easy to desorb and regenerate and stable in performance under the alkaline condition. Recovery of methylbenzene in crylic acid waste gas can be achieved by adopting the resin, the methylbenzene is reused in a crylic acid refining process to serve as an entrainer for cyclic use, and resourceful waste gas utilization is achieved. In addition, the waste gas obtained afteradsorption treatment meets the requirement of the national discharge index, waste gas incineration disposal is decreased, the energy consumption is further reduced, and great environmental protectionand obvious economic benefit are produced.

Description

technical field [0001] The invention belongs to the technical field of resin modification and preparation of acrylic acid, and relates to a modified polyamino macroporous resin, a preparation method and a method for treating waste gas from acrylic acid production. Background technique [0002] Acrylic acid is produced by propylene under the action of a catalyst through one or two stages of oxidation to obtain a gas containing acrylic acid product, and the gaseous product is cooled to recover heat and absorb water to obtain an aqueous solution containing 30-60 wt% acrylic acid. The solution also includes acetic acid, formaldehyde, crotonic acid, acrylic acid dimer, etc. Due to the strong intermolecular force between acrylic acid and water, acetic acid, etc. and acrylic acid is easy to polymerize at high temperature, it is difficult to achieve long-term stable operation by direct separation by ordinary distillation. In order to overcome the above problems, azeotropic distilla...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08F212/14C08J9/28C08J7/16C08J7/02C08L25/08B01D53/02
CPCB01D53/02B01D2253/202B01D2257/704C08F212/08C08J7/02C08J7/16C08J9/28C08J2325/08C08F212/36C08F212/14
Inventor 徐赛徐彦龙葛飞常林朱子忠张宏科
Owner WANHUA CHEM GRP CO LTD
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