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Ferric salt-polyepichlorohydrin-dimethylamine composite flocculant as well as preparation method and application thereof

A polyepichlorohydrin and composite flocculant technology, which is used in flocculation/sedimentation water/sewage treatment, etc., can solve problems such as aluminum biological toxicity, and achieve strong adsorption and bridging ability, high positive charge density, and wide range of dosage. Effect

Inactive Publication Date: 2013-04-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this product is an aluminum salt coagulant, and there is a general concern about the potential biological toxicity of residual aluminum

Method used

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  • Ferric salt-polyepichlorohydrin-dimethylamine composite flocculant as well as preparation method and application thereof
  • Ferric salt-polyepichlorohydrin-dimethylamine composite flocculant as well as preparation method and application thereof
  • Ferric salt-polyepichlorohydrin-dimethylamine composite flocculant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of iron salt-polyepichlorohydrin-dimethylamine composite flocculant, the preparation steps are as follows:

[0033] (1) Weigh 29.02g FeCl 3 ·6H 2 O solid in a beaker, add 300mL distilled water, stir with a magnetic stirrer to make FeCl 3 ·6H 2 The O solid is completely dissolved to obtain a ferric chloride solution, and then continue to dissolve 4.73g of anhydrous sodium carbonate powder in (30-60) mL of distilled water under magnetic stirring to obtain a sodium carbonate solution, and add (3-5) mL / Add the sodium carbonate solution dropwise into the ferric chloride solution at a speed of 1 min, and control the degree of alkalinity to 0.5; after the foam disappears, continue to follow the Na 2 HPO 4 12H 2 O and FeCl 3 ·6H 2 Add stabilizer Na at a ratio of O molar ratio of 0.08 2 HPO 4 12H 2 O powder, Na 2 HPO 4 12H 2 After the O powder is completely dissolved, continue to stir and mature for 2 hours, dilute with distilled water until the mass concent...

Embodiment 2

[0037] An iron salt-polyepichlorohydrin-dimethylamine composite flocculant, the preparation steps are the same as in Example 1, the difference is that the distilled water in step (1) is diluted to a mass concentration of iron of 5g / L to obtain polyferric chloride solution, set aside.

Embodiment 3

[0039] An iron salt-polyepichlorohydrin-dimethylamine composite flocculant, the preparation steps are the same as in Example 1, the difference is that in step (1) distilled water is diluted to a mass concentration of iron of 15g / L to obtain polyferric chloride solution, set aside.

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Abstract

The invention relates to a ferric salt-polyepichlorohydrin-dimethylamine composite flocculant. The composite flocculant is prepared by mixing a ferric chloride solution or a polyferric chloride solution and polyepichlorohydrin-dimethylamine at a normal temperature; the mass concentration of Ferrum in the ferric chloride solution or the polyferric chloride solution is 5-15 g / L; and the mass ratio of the Ferrum in the ferric salt-polyepichlorohydrin-dimethylamine composite flocculant to the polyepichlorohydrin-dimethylamine is (1-10):1. The invention further relates to a preparation method and an application of the ferric salt-polyepichlorohydrin-dimethylamine composite flocculant. The preparation method provided by the invention is simple, convenient, economic and practical, can be widely applied to water supply and waste water treatment in the fields such as dye waste water, surface water, refinery processing wastewater, papermaking, mining and daily-use chemical industry, and has the advantages of simple and fast treatment process as well as good coagulation effect.

Description

technical field [0001] The invention relates to an iron salt-polyepichlorohydrin-dimethylamine composite flocculant and its preparation method and application, belonging to the technical field of environmental chemistry and water treatment. Background technique [0002] The coagulation process is one of the most commonly used units in the water treatment process, and the quality of the flocculant is the decisive factor affecting the water treatment effect. Flocculants mainly include inorganic and organic flocculants. Aluminum salt and iron salt inorganic polymer flocculants are the most widely used in water treatment at home and abroad. In order to improve the effect of water treatment and increase the reuse rate of water, it is urgent to develop a new type of composite high-efficiency flocculant with better performance, wider application range and in line with the requirements of contemporary water treatment on the basis of existing inorganic polymer flocculants. . There...

Claims

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Application Information

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IPC IPC(8): C02F1/56
Inventor 高宝玉杨忠莲岳钦艳王燕李倩
Owner SHANDONG UNIV
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