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Environment-friendly flocculant suitable for circulating water treatment in painting workshop and its preparation method and application

A flocculant and environment-friendly technology, applied in the field of environment-friendly flocculants and their preparation, can solve the problems of operator and surrounding environment hazards, non-biodegradability, secondary pollution of water bodies, etc., so as to improve the flocculation effect and increase the Large pores and specific surface area, the effect of accelerated flocculation

Active Publication Date: 2018-09-18
捷艾悉环保科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this product is synthesized by chemical action and is not biodegradable. It is easy to produce a large amount of COD and BOD when used to treat the water system, causing secondary pollution of the water body.
Domestic Zhu Lizhong, Li Zhi and others have also done research on the application of aldehyde-amine condensation products and aromatic amine-aldehyde condensation products as water treatment agents in the 1990s, although these agents have relatively high activity on paints. , but this type of product volatilizes toxic gas during production and use, causing great harm to the operator and the surrounding environment

Method used

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  • Environment-friendly flocculant suitable for circulating water treatment in painting workshop and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of environment-friendly flocculant:

[0032] (1) Preparation of modified medical stone: calcining medical stone at 300° C. for 0.7 hour, cooling to 85° C., adding an aqueous solution containing quaternary ammonium chitosan and acetic acid (2% quaternary ammonium chitosan Add 2% of glacial acetic acid into 96% water and fully stir until the quaternary ammonium chitosan is completely dissolved), control the temperature at 85°C and stir for 4 hours, and finally grind it into granules to obtain the modified wheat rice stone, wherein: the weight ratio of quaternary ammonium chitosan, acetic acid and medical stone is 0.002:0.002:1.

[0033] (2) Add 18% of modified medical stone and 10% of hectorite obtained in step (1) into water, and stir evenly to obtain an environment-friendly flocculant. The appearance of the flocculant is a light yellow viscous liquid with a pH of 7.03.

Embodiment 2

[0035] Preparation of environment-friendly flocculant:

[0036](1) Preparation of modified medical stone: calcining medical stone at 300° C. for 0.7 hour, cooling to 85° C., adding an aqueous solution containing quaternary ammonium chitosan and acetic acid (2% quaternary ammonium chitosan Add 2% of glacial acetic acid into 96% water and fully stir until the quaternary ammonium chitosan is completely dissolved), control the temperature at 85°C and stir for 4 hours, and finally grind it into granules to obtain the modified wheat rice stone, wherein: the weight ratio of quaternary ammonium chitosan, acetic acid and medical stone is 0.002:0.002:1.

[0037] (2) Add 20% of modified medical stone and 8% of hectorite obtained in step (1) into water, and stir evenly to obtain an environment-friendly flocculant. The appearance of the flocculant is a light yellow viscous liquid with a pH of 6.94.

Embodiment 3

[0039] Preparation of environment-friendly flocculant:

[0040] (1) Preparation of modified medical stone: calcining medical stone at 300° C. for 0.7 hour, cooling to 85° C., adding an aqueous solution containing quaternary ammonium chitosan and acetic acid (2% quaternary ammonium chitosan Add 2% of glacial acetic acid into 96% water and fully stir until the quaternary ammonium chitosan is completely dissolved), control the temperature at 85°C and stir for 4 hours, and finally grind it into granules to obtain the modified wheat rice stone, wherein: the weight ratio of quaternary ammonium chitosan, acetic acid and medical stone is 0.002:0.002:1.

[0041] (2) Add 23% of modified medical stone and 5% of hectorite obtained in step (1) into water, and stir evenly to obtain an environment-friendly flocculant. The appearance of the flocculant is a light yellow viscous liquid with a pH of 7.07.

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Abstract

The invention provides an environment-friendly flocculating agent, and a preparation method and application purpose thereof. Through being metered in percentage by weight, the environment-friendly flocculating agent is prepared from 10 to 30 percent of modified medical stone, 5 to 10 percent of hectorite and the balance water, wherein the modified medical stone consists of medical stone and chitosan quaternary ammonium salt grafted on the medical stone through chemical bonds. The flocculating agent has the advantages that any harmful ingredients are not added, so that the environment-friendly effect is achieved; the formula is simplified; meanwhile, the flocculating effect is further improved, so that the COD (chemical oxygen demand) removal rate is improved; the flocculating speed is accelerated; the paint slag agglomeration is large; the paint slag water content is low; the degerming, bacteriostasis and deodorization effects are achieved.

Description

technical field [0001] The invention relates to an environment-friendly flocculant especially suitable for the treatment of circulating water in a painting workshop, a preparation method and application thereof. Background technique [0002] Under the highly developed modern civilization, industrial wastewater and urban sewage are increasingly harmful to the environment. Prevention and control of industrial wastewater and urban sewage pollution has become a common concern. At present, the flocculants commonly used in the industry mainly include inorganic and organic flocculants, and there are many varieties. The price of inorganic flocculant is low, but the dosage is high. Organic synthetic polymer flocculants are used in small amounts and have good flocculation effects, and are suitable for the treatment of various wastewaters. However, they are mainly derived from the petroleum industry, have high costs and are harmful to the environment. [0003] In the coating industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/50C02F1/52
CPCC02F1/50C02F1/5263C02F2303/02C02F2303/04
Inventor 许海谢爱军高素萍常立沙锦尤国彪
Owner 捷艾悉环保科技(上海)有限公司
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