A crown ether-based flocculant for papermaking wastewater treatment and preparation method thereof

A technology for papermaking wastewater and flocculant, which is applied in the process of wastewater treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low flocculation and sedimentation efficiency, secondary pollution, and high drug consumption, and achieves low equipment dependence. , The use of safe and environmental protection, the effect of easy access to raw materials

Active Publication Date: 2021-08-06
XINXIANG BOYUAN WATER PURIFYING MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared flocculant based on crown ether for papermaking wastewater treatment overcomes the technical problems of low flocculation and sedimentation efficiency, high chemical consumption, easy to cause secondary pollution, and strong metal corrosion ability of traditional papermaking wastewater treatment flocculants. High number, strong adsorption and bridging ability, small dosage, good flocculation effect, wide application range, less sludge generated, fast flocculation speed, stable performance, safe and environmentally friendly use

Method used

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  • A crown ether-based flocculant for papermaking wastewater treatment and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] A method for preparing a flocculant for papermaking wastewater treatment based on crown ether, comprising the steps of:

[0033] Preparation of S1 polymerized betaine: In a three-neck flask equipped with a stirrer, a thermometer, and a constant pressure dropping funnel, add 10 g of 3-trimethoxysilane propyl acrylate, 23.5 g of betaine, 100 g of dichloromethane, and 1g of cuprous metal and 3g of dibutyltin dilaurate, raising the temperature to 85°C, then adding 4g of distilled water dropwise, stirring and reacting at 95°C for 8 hours, then layering, and then rotary evaporation to remove the solvent to obtain polymerized betaine;

[0034] S2 Preparation of crown ether-based acrylamide copolymers: 10 g of polymerized betaine, 4-vinylbenzo-18-crown ether-610 g, 20 g of acrylamide, N-trimethylolform Dissolve 10 g of acrylamide and 1 g of azobisisobutyronitrile in 150 g of dimethyl sulfoxide, stir and react at 65 °C for 4 hours under a nitrogen atmosphere, then precipitate in...

Embodiment 2

[0039] A method for preparing a flocculant for papermaking wastewater treatment based on crown ether, comprising the steps of:

[0040] Preparation of S1 polymerized betaine: In a three-neck flask equipped with a stirrer, a thermometer, and a constant pressure dropping funnel, add 10 g of 3-trimethoxysilane propyl acrylate, 23.5 g of betaine, 110 g of acetonitrile, and ferric chloride 1.3g and 3g of dibutyltin dilaurate, raise the temperature to 87°C, add 4g of distilled water dropwise, stir and react at 96°C for 8.5 hours, then separate layers, and then spin evaporate to remove the solvent to obtain polymerized betaine;

[0041] S2 Preparation of crown ether-based acrylamide copolymers: 10 g of polymerized betaine, 4-vinylbenzo-18-crown ether-610 g, 20 g of acrylamide, N-trimethylolform Dissolve 10g of acrylamide and 1.5g of azobisisobutyronitrile in 162g of N,N-dimethylformamide, stir and react at 67°C for 4.5 hours under a helium atmosphere, then precipitate in acetone, fil...

Embodiment 3

[0046] A method for preparing a flocculant for papermaking wastewater treatment based on crown ether, comprising the steps of:

[0047] Preparation of S1 polymerized betaine: In a three-neck flask equipped with a stirrer, a thermometer, and a constant pressure dropping funnel, add 10 g of 3-trimethoxysilane propyl acrylate, 23.5 g of betaine, 135 g of acetone, and 1.5 g of sodium sulfate and 3g of dibutyltin dilaurate, raise the temperature to 89°C, add dropwise 4g of distilled water, stir and react at 97°C for 9 hours, then separate layers, and then spin evaporate to remove the solvent to obtain polymerized betaine;

[0048] S2 Preparation of crown ether-based acrylamide copolymers: 10 g of polymerized betaine, 4-vinylbenzo-18-crown ether-610 g, 20 g of acrylamide, N-trimethylolform Dissolve 10g of acrylamide and 2g of azobisisobutyronitrile in 175g of N-methylpyrrolidone, stir and react at 69°C for 5 hours under a neon atmosphere, then precipitate in acetone, filter with suc...

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PUM

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Abstract

The invention provides a method for preparing a flocculant based on crown ether for papermaking wastewater treatment, comprising the following steps: S1 preparation of polymerized betaine, S2 preparation of crown ether-based acrylamide copolymer, S3 surface modification of graphene oxide Preparation, S4 preparation of crown ether-based flocculant for papermaking wastewater treatment. The invention also discloses a crown ether-based flocculant for treating papermaking wastewater prepared according to the preparation method. The preparation method disclosed by the invention is simple and easy, the raw materials are easy to obtain, the dependence on equipment is not high, and it is suitable for large-scale production. The prepared flocculant for papermaking wastewater treatment based on crown ether has high intrinsic viscosity and strong adsorption and bridging ability , Small dosage, good flocculation effect, wide application range, less sludge generated, fast flocculation speed, stable performance, safe and environmentally friendly use.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a crown ether-based flocculant for papermaking wastewater treatment and a preparation method thereof. Background technique [0002] In recent years, with the advancement of global industrialization, environmental problems have become increasingly serious and have become a mountain restricting social and economic development. Water pollution is one of many environmental problems. It directly threatens people's health, and at the same time, it will lead to the waste of water, the source of life, and cause a shortage of water resources. Therefore, the development of wastewater treatment technology is imperative. [0003] Papermaking wastewater is a representative type of wastewater. Because it contains a lot of fibers, pigments and inorganic salts, it will turn the water black and have a special foul smell. These pollutants are difficult to deal with, which hinders th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C02F103/28
CPCC02F1/56C02F2103/28C08F220/56C08F212/32C08F220/58
Inventor 肖银宝其他发明人请求不公开姓名
Owner XINXIANG BOYUAN WATER PURIFYING MATERIALS CO LTD
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