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Economic inorganic-organic composite flocculant

A kind of composite flocculant, economical technology, applied in the field of water treatment, can solve the problems of retention, low occupancy, etc., achieve the effect of low cost, low moisture content, and benefit for subsequent treatment

Inactive Publication Date: 2004-04-21
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional inorganic and organic flocculants, the new flocculant has been greatly improved in terms of product quality (including treatment effect, effluent quality, use safety, health requirements and environmental standards, etc.), so as to adapt to the increasingly Strict quality standards for environmentally friendly products; on the other hand, most of the research on new flocculants stays in the laboratory stage, and few products are actually put on the market, and their market share is very low

Method used

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  • Economic inorganic-organic composite flocculant
  • Economic inorganic-organic composite flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The present invention takes inorganic aluminum salt (aluminum trichloride), corn starch, water, sodium hydroxide (NaOH) as raw material, and corn starch is main component, and water is used as reaction solvent, and sodium hydroxide is used for the modification of corn starch; The mass ratio of aluminum and cornstarch in the salt is 1:1;

[0041] Its preparation method is: (1) modification of starch: take 20 grams of corn starch and add 250% water to form a solution, slowly add 20 ml of 25% NaOH in a water bath at 55 ° C and slowly stir for modification reaction for 1 hour; (2) take trichloro 100 grams of aluminum chloride, containing 20 grams of aluminum, add 110 grams of water; (3) synthesis reaction: under stirring conditions, add modified starch to the aluminum chloride solution to mix, adjust the pH to 2.5 with hydrochloric acid and caustic soda solution, and Composite reaction in a water bath at 55°C for 3 hours to obtain an emulsion, which is the product flocculan...

Embodiment 2

[0043] The difference from Example 1 is that the inorganic salt is an iron salt, the ratio of iron to starch is 1:1 in the preparation process, and the pH in the synthesis reaction is different. Its preparation method is: (1) take 45 grams of ferric trichloride, which contains 15 grams of iron, and add 70 grams of water to make a solution; (2) modification of starch: take 10 grams of cornstarch and add 190 grams of water to make a solution, Slowly add 5mL 50% NaOH in a water bath at 40°C and stir the modification reaction for 1 hour; (3) Composite reaction: fully mix the modified starch and iron salt, adjust the pH to 1.0, and compound at 60°C under stirring conditions React for 6 hours to get the product flocculant;

Embodiment 3

[0045] Difference with Example 2 is: the mass ratio of iron and cornstarch in the iron salt is 10: 1; Its preparation method is: (1) the preparation of iron salt: get 100 grams of iron powders by mass ratio and use 20%HCl to completely After dissolving, use an oxidizing agent (chlorine, hydrogen peroxide, etc.) to make a solution containing ferric iron; (2) Modification of starch: take 10 grams of cornstarch and add 50 grams of water to make a solution, slowly add 10 mL of 10% KOH stirred modification reaction for 0.5 hours; (3) Composite reaction: Add the modified starch into the iron salt solution under agitation, adjust the pH to 1.5, and perform a composite reaction at 80°C for 3 hours under agitation to obtain The reddish-brown emulsion is the product flocculant;

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Abstract

A cheaper composite inorganic-organic flocculant for treating sewage or fresh water is prepared from inorganic salt (Al salt or Fe salt), starch and alkali through proportioning, pretreating starch and inorganic salt, and synthesizing reacting. Its advantages are low cost, high effect and no secondary pollution.

Description

technical field [0001] The invention relates to water treatment, in particular to an economical inorganic-organic composite flocculant used for industrial sewage and urban domestic sewage. Background technique [0002] Worldwide, due to the pollution of industrial and agricultural production and the intensity of human activities brought about by the population surge; the uneven distribution of water resources in time and space has led to a water crisis [Document 1. Sun Tieheng, Zhou Qixing, Li Peijun . Pollution Ecology. Beijing: Science Press, 2001] [Document 2. Zhou Qixing, Wang Rusong. 1997. Research on the ecological risk and background warning value of water pollution in rural urbanization. Journal of Applied Ecology, 8(3): 309-313 , pp16-24]. In today's environmental protection industry, water treatment agent is the most widely used and used product in the current water industry, sewage treatment and water conservation, and sewage resource purification treatment. It l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56
Inventor 张凯松周启星
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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