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Modified macroporous resin and method for treating butyl acrylate waste water by using same

A macroporous resin and modification technology, applied in water/sewage treatment, natural water treatment, chemical instruments and methods, etc., can solve the problems of unstable biochemical treatment process, high cost of solid waste treatment, high investment cost, etc. Wastewater treatment is difficult, resource utilization is realized, and the effect of huge economic value

Active Publication Date: 2017-05-31
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high salt content of butyl acrylate wastewater, and acrylic acid has certain toxicity to bacteria, a large amount of clear water is required to be mixed to meet the treatment requirements of microorganisms. The useful materials such as acrylic acid in wastewater are basically completely lost, and the biochemical treatment process is unstable.
Incineration treatment is currently the most common treatment method for butyl acrylate wastewater. It is simple, direct, effective and not affected by the composition of wastewater, but the disadvantages are obvious: firstly, incineration needs to consume a large amount of fuel gas or fuel oil, and the fuel cost is relatively high; incineration contains salt Wastewater will produce inorganic salts, and the cost of solid waste treatment is relatively high
The treatment of butyl acrylate wastewater by bipolar membrane electrodialysis has been reported in the literature. This method can realize the desalination of wastewater and recover the useful components in it at the same time, but the electrodialysis method consumes a lot of electricity, and the treatment cost is about 100-150 yuan / ton, and the one-time investment cost is very high; in addition, acrylic acid is easy to polymerize, and the polymer is easy to block the pores of the electrodialysis membrane, so the realizability is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of modified macroporous resin

[0037] a) In a reactor equipped with a stirrer, a reflux condenser and a thermometer, add deionized water and gelatin (mass ratio 80:1), soak for 12h, then heat up to 45°C, add the pre-prepared oil phase (two The concentration of vinylbenzene is 55wt%, the porogen toluene with 2 times the mass of DVB, and the initiator BPO with 1% mass of DVB are mixed uniformly), and the mass ratio of deionized water and gelatin mixed solution to oil phase is 9:0.5. Adjust the stirring speed to disperse the oil phase into oil droplets with appropriate particle size, slowly heat up to 78°C for 2 hours at a heating rate of 1°C / 2min, then heat up to 85°C for 3 hours, and then heat up to 90°C for 6 hours , stop the reaction. Filter out the resin while it is still hot, wash the resin with a large amount of hot water until the washed water is clear, dry at 25°C, wash with tetrahydrofuran for 4h, acetone for 4h, dry in the air, dry under vacuum at ...

Embodiment 2

[0047] Preparation of modified macroporous resin

[0048] a) In a reactor equipped with a stirrer, a reflux condenser and a thermometer, add deionized water and gelatin (mass ratio 80:1), soak for 12.5h, then heat up to 50°C, add the pre-prepared oil phase ( Divinylbenzene concentration of 68wt%, porogen isooctane with 1.5 times the mass of DVB, and initiator azobisisobutyronitrile with a mass of 0.6% of DVB are added), the mixed solution of deionized water and gelatin and the mass of the oil phase The ratio is 9:0.8. Adjust the stirring speed to disperse the oil phase into oil droplets with appropriate particle size, then slowly heat up to 78°C for 2.5 hours at a heating rate of 1°C / 2min, then heat up to 85°C for 3 hours, and then heat up to 90°C for 6 hours , stop the reaction. Filter out the resin while it is still hot, wash the resin with a large amount of hot water until the washing water is clear, dry at 35°C, wash with tetrahydrofuran for 4 hours, acetone for 4 hours,...

Embodiment 3

[0058] Preparation of modified macroporous resin

[0059] a) In a reactor equipped with a stirrer, a reflux condenser and a thermometer, add deionized water and gelatin (mass ratio 80:2), soak for 14 hours, then heat up to 47°C, and add the pre-prepared oil phase (two Vinylbenzene concentration of 70wt%, porogen toluene with 2.5 times the mass of DVB, and initiator BPO with a mass of 1% of DVB are added, and the mass ratio of the mixed solution of deionized water and gelatin to the oil phase is 9:0.65. Adjust the stirring speed to disperse the oil phase into oil droplets with appropriate particle size, slowly heat up to 78°C for 2 hours at a heating rate of 1°C / 2min, then heat up to 85°C for 3 hours, and then heat up to 90°C for 6.5 hours , stop the reaction. Filter out the resin while it is still hot, wash the resin with a large amount of hot water until the washing water is clear, dry at 25°C, wash with tetrahydrofuran for 5 hours, wash with acetone for 4 hours, dry in the ...

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PUM

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Abstract

The invention discloses modified macroporous resin and a method for treating butyl acrylate production waste water by using the same. The modified macroporous resin is macroporous resin modified by amino; compared with the common macroporous resin, due to the special intermolecular action of the amino on carboxyl and hydroxyl, the modified macroporous resin is better in effect of absorbing acrylic acid, n-butyl alcohol, a polymerization inhibitor and the like, and is easy in desorption regeneration and stable in performance. The modified macroporous resin can be used for recovering the components such as the acrylic acid, the n-butyl alcohol and the polymerization inhibitor in butyl ester waste water, and is taken as a raw material of a butyl ester esterification reaction, thus realizing waste resource utilization and producing obvious economic benefit; furthermore, the waste water treated by using the modified macroporous resin can reach the requirement for the indexes of waste water discharged into the sea in China, so that the waste water can be directly discharged into the sea, the subsequent waste water treatment pressure is relieved, and a great environmental protection benefit is obtained.

Description

technical field [0001] The invention relates to a modified macroporous resin and a method for treating wastewater from butyl acrylate production. Background technique [0002] The homogeneous catalysis of organic acids such as p-toluenesulfonic acid or methanesulfonic acid to produce butyl acrylate has a simple process flow and relatively low energy and material consumption, so it is one of the mainstream processes for the production of butyl acrylate at present. In the process, acrylic acid and n-butanol are continuously reacted under the catalysis of organic acid catalyst, and the generated water is continuously separated from the system by azeotrope in the process, thereby producing butyl acrylate. Since the esterification reaction is a reversible reaction, the acrylic acid in this reaction cannot be completely converted, and the incompletely reacted acrylic acid is subsequently neutralized and removed by dilute lye. strong waste water. [0003] For every 10 tons of but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F9/10C02F103/36
CPCB01J20/265B01J20/28085C02F1/048C02F1/26C02F1/285C02F1/42C02F9/00C02F2001/425C02F2103/36
Inventor 葛飞徐彦龙王亚辉常林张宏科
Owner WANHUA CHEM GRP CO LTD
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