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A kind of preparation method of green high-efficiency composite flocculant

A composite flocculant and high-efficiency technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unrealistic large-scale industrialization, high production cost, complicated production process of flocculation materials, etc., and achieve the elimination of aluminum salt toxicity , low cost, good flocculation effect

Inactive Publication Date: 2011-12-14
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods and production processes for screening, cultivating, fermenting and extracting flocculation substances by microorganisms and bacteria are complicated and the production cost is too high. At present, most of them are still in the laboratory stage, and it is not realistic to implement large-scale industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a green high-efficiency composite flocculant, the steps are as follows:

[0032] 1) Weigh 1.5 grams of plant fibrous waste powder, put it into a 250ml beaker, prepare 20 w % sodium hydroxide aqueous solution, slowly add 20ml of this sodium hydroxide solution into the beaker, stir well, and carry out alkalization at 38oC , the time is 60 minutes;

[0033] 2) Prepare an aqueous solution of chloroacetic acid with a concentration of 13w%, add 25ml of this aqueous solution of chloroacetic acid to the above reaction solution, stir evenly, and carry out etherification at a temperature of 80oC for 50 minutes;

[0034] 3) Prepare an aqueous solution of aluminum trichloride with a concentration of 30 w %, add 25ml of the aqueous solution of aluminum trichloride to the above-mentioned reaction solution after alkalization and etherification, stir evenly, and control the temperature condition to 40oC to carry out the compound reaction, the reaction The time ...

Embodiment 2

[0036] A preparation method of a green high-efficiency composite flocculant, the steps are as follows:

[0037] 1) Weigh 3 grams of plant fibrous waste powder, put it into a 250ml beaker, prepare 20 w % sodium hydroxide aqueous solution, slowly add 40ml of this sodium hydroxide aqueous solution into the beaker, stir well, and carry out alkalization at 30oC , the time is 55 minutes;

[0038]2) Prepare an aqueous solution of chloroacetic acid with a concentration of 13w%, add 35ml of this aqueous solution of chloroacetic acid to the above reaction solution, stir evenly, and carry out etherification at a temperature of 75oC for 50 minutes;

[0039] 3) Prepare an aqueous solution of aluminum trichloride with a concentration of 40w%, add 25ml of the aqueous solution of aluminum trichloride to the above-mentioned reaction solution after alkalization and etherification, stir evenly, and control the temperature condition at 50oC to carry out the compound reaction, the reaction The ti...

Embodiment 3

[0041] A preparation method of a green high-efficiency composite flocculant, the steps are as follows:

[0042] 1) Weigh 2 grams of plant fibrous waste powder, put it into a 250ml beaker, prepare 18 w % sodium hydroxide aqueous solution, slowly add 40ml of this sodium hydroxide aqueous solution into the beaker, stir well, and carry out alkali at 40oC , the time is 55 minutes;

[0043] 2) Prepare an aqueous solution of chloroacetic acid with a concentration of 14w%, add 35ml of this aqueous solution of chloroacetic acid to the above reaction solution, stir evenly, and carry out etherification at a temperature of 75oC for 50 minutes;

[0044] 3) Prepare an aqueous solution of aluminum chloride with a concentration of 40w%, add 25ml of the aqueous solution of aluminum chloride to the above-mentioned reaction solution after alkalization and etherification, stir evenly, and control the temperature condition to 80oC for compound reaction, the reaction time After 4 hours, a taupe li...

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Abstract

A method for preparing a green and high-efficiency composite flocculant, which uses plant fibrous waste and inorganic aluminum salts as raw materials, uses sodium hydroxide as an alkalizing agent, chloroacetic acid as an etherifying agent, and uses inorganic aluminum salts as a matrix basic material. Composite flocculant composed of natural organic matter and inorganic aluminum salt, the steps are as follows: 1) alkalinize plant fibrous waste with sodium hydroxide solution; 2) add chloroacetic acid aqueous solution for etherification; 3) finally add inorganic aluminum salt aqueous solution for Composite reaction to obtain a gray-brown liquid composite flocculant. The advantages of the present invention are: good flocculation effect, no secondary pollution, good ecological safety; simple preparation method, mild reaction conditions, easy to scale up to realize industrial production; good economic performance, low cost, wide source of synthetic raw materials, conforming to circular economy, Requirements for clean production; a wide range of applications, suitable for a variety of industrial wastewater and domestic wastewater, and even industrial water supply, and can further expand the scope of use by adjusting the formula ratio.

Description

technical field [0001] The invention relates to the fields of sewage treatment and water supply, in particular to a green composite high-efficiency flocculant used for industrial waste water or domestic sewage treatment and drinking water purification. Background technique [0002] At present, flocculants widely used in sewage treatment can be divided into inorganic flocculants, organic flocculants, microbial flocculants and composite flocculants. Among them, inorganic flocculants are cheap and have good flocculation effects. It is represented by its polymer; the density and strength of the alum flowers formed by iron salt are relatively large, the water purification effect is remarkable, the effect is not affected by the water temperature, the pH value is widely used, and it has a good treatment effect on some raw water, but the iron salt The flocculant is not only highly corrosive, but also requires high equipment, and it is easy to leave iron ions, which makes the treated...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56
Inventor 杨晓霞周启星华涛王玉哲
Owner NANKAI UNIV
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