Treatment method of methacrylate or acrylate industrial wastewater

A technology for acrylate and production wastewater, applied in the chemical industry, can solve the problems of unstable production process, high reverse osmosis process requirements, and large fluctuation of water quality components.

Active Publication Date: 2010-07-28
GUANGDONG RITOP FINE CHEM
View PDF3 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of acrylic acid wastewater is complex, the water quality components fluctuate greatly during the production process, the production process is unstable, and toluene needs to be added in the rectification process, which is easy to cause environmental pollution, and the reverse osmosis process requires high requirements, the reverse osmosis membrane is easy to block, and the operating cost is high.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 1000g of acrylate production wastewater with a mass fraction of 20.2% of sodium acrylate, adjust its pH to 6, and filter it through an active carbon layer from top to bottom for pretreatment, add 1.01g of sodium bisulfite to the pretreated wastewater, Stir to dissolve sodium bisulfite and raise the temperature to 40°C; add dropwise 40 g of an aqueous solution with a mass fraction of 1% potassium persulfate dissolved in the waste water, and keep it warm for 10 hours to carry out polymerization reaction; cool the reacted waste water to room temperature, pass through ultrafiltration Membrane separation module with an operating pressure of 0.3 MPa to separate and remove part of the water and small molecular salts to obtain 698 grams of sodium polyacrylate aqueous solution with an average molecular weight of 8016 sodium polyacrylate.

Embodiment 2

[0023] Get 1000g of acrylate production waste water with a mass fraction of 20.2% of sodium acrylate, adjust its pH to 8, and filter it through an active carbon layer from bottom to top for pretreatment, add 20.2 g of ammonium bisulfite to the pretreated waste water, stir Dissolve ammonium bisulfite and heat up to 70°C; add dropwise 10 g of an aqueous solution with a mass fraction of 40% ammonium persulfate dissolved in the waste water, and keep warm for 1 hour to carry out polymerization reaction; cool the reacted waste water to room temperature, and pass through the nanofiltration membrane Separation components, the operating pressure is 1.0Mpa, separation and removal of part of the water and small molecular salts to obtain 628g of sodium polyacrylate aqueous solution, the average molecular weight of sodium polyacrylate is 4196.

Embodiment 3

[0025] Take 1000g of acrylate production wastewater with a mass fraction of sodium methacrylate of 10.9%, adjust its pH to 7, and filter it through an active carbon layer from top to bottom for pretreatment, and add 5g of potassium bisulfite to the pretreated wastewater , stir to dissolve potassium bisulfite and heat up to 90 ° C; dropwise add 50 g of an aqueous solution with a mass fraction of 1% potassium persulfate dissolved in the waste water, and keep it warm for 2 hours to carry out polymerization reaction; cool the reacted waste water to room temperature, pass through the Membrane separation module with an operating pressure of 1.0Mpa, separated and removed part of the water and small molecular salts to obtain 603g of sodium polymethacrylate aqueous solution, the average molecular weight of sodium polymethacrylate was 3368.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a treatment method of methacrylate or acrylate industrial wastewater. The method comprises the following steps: adjusting the pH value of methacrylate or acrylate industrial wastewater to 6-8, ensuring the wastewater to pass through an activated carbon layer for filtering and pretreatment, adding chain transfer agent in the pretreated wastewater, stirring to dissolve solids, heating to 40-90 DEG C; dropping an aqueous solution dissolved with initiator, keeping temperature for 1-10 hours to perform polymerization reaction; cooling the reacted wastewater to the room temperature, and passing through a nanofiltration membrane and / or ultrafiltration membrane separating component to remove partial water and small molecule salts and obtain a sodium polymethacrylate or sodium polyacrylate aqueous solution. By using the method of the invention, the wastewater discharge is reduced during the production process of methacrylate or acrylate; the sodium methacrylate or sodium acrylate in wastewater is recycled, and the byproduct low molecular weight sodium polymethacrylate or sodium polyacrylate aqueous solution can be used as the dispersant, antisludging agent and water reducing agent of cement.

Description

technical field [0001] The invention relates to a method for treating waste water from (meth)acrylate production, which belongs to the field of chemical industry. Background technique [0002] (Meth)acrylate production wastewater is a kind of high-concentration organic wastewater. If it is not treated and discharged directly, it will seriously pollute the environment. At present, domestic methods for treating this type of wastewater are mainly incineration and catalytic wet oxidation. In addition, there are reports of biological methods and electrolysis-biological combination methods. These methods cannot recycle (meth)acrylate in wastewater, while reverse osmosis Although the membrane separation method can recover (meth)acrylate, the recovery cost is high, and the requirements for reverse osmosis are relatively high. [0003] Direct incineration is currently the main method for domestic treatment of (meth)acrylic acid production wastewater. The process is to preheat and n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/36
Inventor 方岩雄陈浩俊周蓓蕾张焜
Owner GUANGDONG RITOP FINE CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap