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A kind of modified macroporous resin and its method for treating butyl acrylate waste water

A technology of butyl acrylate and macroporous resin, which is applied in natural water treatment, water/sewage 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., to achieve Solve the difficulty of wastewater treatment, realize the utilization of resources, and the effect of huge economic value

Active Publication Date: 2019-04-23
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) Add deionized water and gelatin (mass ratio 80:1) to a reactor equipped with a stirrer, a reflux condenser, and a thermometer, soak for 12 hours, then heat up to 45°C, and prepare the pre-prepared oil phase (two Ethylene benzene concentration 55wt%, porogen toluene 2 times the mass of DVB, initiator BPO 1% mass DVB mixed evenly) were added, and the mass ratio of deionized water and gelatin mixed solution to oil phase was 9:0.5. Adjust the stirring speed to disperse the oil phase into oil droplets of appropriate particle size, then slowly raise the temperature to 78°C for 2 hours at a heating rate of 1°C / 2min, then raise the temperature to 85°C for 3 hours, then raise the temperature to 90°C for 6 hours , stop responding. Filter out the resin while it is 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 4 hours, wash with acetone for 4 ho...

Embodiment 2

[0047] Preparation of modified macroporous resin

[0048] a) Add deionized water and gelatin (mass ratio 80:1) into a reactor equipped with a stirrer, a reflux condenser, and a thermometer, soak for 12.5 hours, then heat up to 50°C, and prepare the pre-prepared oil phase ( Divinylbenzene concentration 68wt%, porogen isooctane 1.5 times the mass of DVB, initiator azobisisobutyronitrile 0.6% mass DVB (mix evenly) add, the mass of 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 of appropriate particle size, then slowly raise the temperature to 78°C for 2.5 hours at a heating rate of 1°C / 2min, then raise the temperature to 85°C for 3 hours, then raise the temperature to 90°C for 6 hours , stop responding. Filter out the resin while it is hot, wash the resin with a large amount of hot water until the washing water is clear, dry at 35°C, wash with tetrahydrofur...

Embodiment 3

[0058] Preparation of modified macroporous resin

[0059] a) Add deionized water and gelatin (mass ratio 80:2) into a reactor equipped with a stirrer, a reflux condenser, and a thermometer, soak for 14 hours, then heat up to 47°C, and put the pre-prepared oil phase (two Ethylene benzene concentration 70wt%, porogen toluene 2.5 times the mass of DVB, and initiator BPO 1% mass DVB are mixed evenly) and 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 of appropriate particle size, then slowly raise the temperature to 78°C for 2 hours at a heating rate of 1°C / 2min, then raise the temperature to 85°C for 3 hours, then raise the temperature to 90°C for 6.5 hours , stop responding. Filter out the resin while it is 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 w...

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PUM

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Abstract

The invention discloses a modified macroporous resin and a method for treating wastewater produced by butyl acrylate. The modified macroporous resin is a macroporous resin modified by amino groups. Compared with ordinary macroporous resins, due to the special intermolecular effect of amino groups on carboxyl groups and hydroxyl groups, it is effective against acrylic acid, n-butanol, and polymerization inhibitors. Better adsorption effect, easy desorption and regeneration, stable performance. The present invention can recycle components such as acrylic acid, n-butanol, and polymerization inhibitor in butyl ester wastewater, and use them as raw materials for butyl ester esterification reaction to realize resource utilization of waste materials and produce obvious economic benefits; moreover, the treated wastewater can reach national According to the requirements of the wastewater discharge index, it can be directly discharged into the sea, which can reduce the pressure of subsequent wastewater treatment and produce great environmental benefits.

Description

technical field [0001] The invention relates to a modified macroporous resin and a method for treating wastewater produced by butyl acrylate. 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 producing butyl acrylate at present. The process uses acrylic acid and n-butanol to react continuously under the catalysis of an organic acid catalyst. During the process, the generated water is continuously separated from the system through azeotropy, thereby producing butyl acrylate. Since the esterification reaction is a reversible reaction, acrylic acid cannot be completely converted in this reaction, and the incompletely reacted acrylic acid is subsequently neutralized and removed by dilute alkali solution. This process produces a stream of high organic conce...

Claims

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Application Information

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Patent Type & Authority Patents(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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