A modified polyamino macroporous resin and its preparation method and a method for treating waste gas from acrylic acid production

A treatment method and macroporous resin technology, which is applied in the field of acrylic acid production waste gas treatment, modified polyamino macroporous resin and its preparation, can solve the problems of weak intermolecular force, no polar group, poor adsorption effect, etc. Achieve the effects of strong affinity, wide application range and stable performance

Active Publication Date: 2020-08-28
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 a modified polyamino macroporous resin, a preparation method and a waste gas treatment method for acrylic acid production. The modified resin is an amino-modified macroporous resin. Compared with the ordinary macroporous resin, due to the special interaction between the amino group and the carbonyl hydrogen molecule, it has a better adsorption effect on acrolein and under alkaline conditions. Easy to desorb and regenerate, with stable performance. The resin of the invention can realize the recovery of toluene in the waste gas of acrylic acid, return it to the acrylic acid refining process and use it as an azeotroping agent for recycling, and realize the resource utilization of waste gas. At the same time, the exhaust gas after adsorption treatment meets the national emission index requirements, reducing the waste gas incineration treatment and further reducing energy consumption, resulting in great environmental protection and obvious economic benefits.

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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Patent Type & Authority Patents(China)
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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