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Polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and preparation method thereof

A technology of polydimethyl diallyl ammonium chloride and dimethyl diallyl ammonium chloride, which can be used in flocculation/sedimentation water/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. High cost of chemicals, poor water treatment effect, etc., to achieve the effect of good water treatment effect, excellent coagulation performance, and large alum

Inactive Publication Date: 2011-11-16
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when it is used alone, not only the chemical cost is high, but also the water treatment effect is not good, and when it is used in combination with some inorganic coagulants, it may show better water treatment effect

Method used

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  • Polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and preparation method thereof
  • Polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and preparation method thereof
  • Polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Heat the polyaluminum chloride solution to a temperature of 60°C under stirring conditions, add the polyferric chloride solution, continue heating and stirring for 1.5 hours, so that a copolymerization reaction occurs between the polyaluminum chloride and the polyferric chloride , get Al 2 o 3 The mass percentage content is 6%, with Fe 2 o 3 The polyaluminum ferric chloride solution that mass percent composition is 5% and salinity is 35%;

[0035] (2) Stir the polyaluminum ferric chloride solution obtained in step (1) at room temperature, add polydimethyldiallyl ammonium chloride that is 30% by mass in terms of solid content and has an intrinsic viscosity value of 3.7dL / g colloid, to obtain the mixed solution of the two; 2 o 3 +Fe 2 o 3 "The mass ratio of the total meter to polydimethyldiallylammonium chloride is 25:1;

[0036] (3) Stir the mixed solution obtained in step (2) at room temperature until the polydimethyldiallylammonium chloride colloid and the ...

Embodiment 2

[0038] (1) Heat the polyaluminum chloride solution to a temperature of 90°C under stirring, add the polyferric chloride solution, and continue heating and stirring for 0.5 hours to cause a copolymerization reaction between the polyaluminum chloride and the polyferric chloride , get Al 2 o 3 The mass percentage content is 10%, with Fe 2 o 3 The polyaluminum ferric chloride solution whose mass percent content is 1% and basicity is 90%;

[0039] (2) Stir the polyaluminium ferric chloride solution obtained in step (1) at room temperature, add polydimethyldiallyl ammonium chloride that is 50% by mass in terms of solid content and has an intrinsic viscosity value of 2.5dL / g colloid to obtain a mixed solution; the content of polyaluminum ferric chloride in the mixed solution is calculated as aluminum oxide and the mass ratio of polydimethyldiallylammonium chloride is 15:1;

[0040] (3) Stir the mixed solution obtained in step (2) at room temperature until the polydimethyldiallyl ...

Embodiment 3

[0042] (1) Heat the polyaluminum chloride solution to a temperature of 40°C under stirring, add the polyferric chloride solution, and continue heating and stirring for 2 hours to cause a copolymerization reaction between the polyaluminum chloride and the polyferric chloride , get Al 2 o 3 The mass percentage content is 8%, with Fe 2 o 3 The polyaluminum ferric chloride solution whose mass percent content is 3% and basicity is 70%;

[0043] (2) Stir the polyaluminum ferric chloride solution obtained in step (1) at room temperature, add polydimethyldiallyl ammonium chloride that is 60% by mass in terms of solid content and has an intrinsic viscosity value of 3.0dL / g Colloid, obtains mixed solution; The content of polyaluminum ferric chloride is expressed as Al in the described mixed solution 2 o 3 +Fe 2 o 3 The mass ratio of total amount meter and polydimethyldiallylammonium chloride is 10: 1;

[0044] (3) Stir the mixed solution obtained in step (2) at room temperature ...

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Abstract

The invention discloses a polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and a preparation method and an application thereof. The method comprises the following steps: heating polyaluminium chloride solution to 40-90 DEG C while stirring the solution, adding polyferric chloride, heating and stirring the solution to perform copolymerization between polyaluminium chloride and polyferric chloride for 0.5-2.0h, obtaining polymeric aluminum ferric chloride solution; adding polydimethyldiallylammonium chloride colloid at room temperature while stirring to obtain a mixed liquor of the two products; stirring at room temperature to ensure that the polydimethyldiallylammonium chloride colloid and polymeric aluminum ferric chloride are completely mutuallysoluble and obtaining the polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical engineering and environmental protection, and mainly relates to the preparation and treatment method of a treatment agent for water body algae pollution, in particular to a polyaluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and Its preparation method and application. Background technique [0002] At present, my country's surface water is seriously polluted. With the development of industry and agriculture, a large amount of organic or inorganic nitrogen and phosphorus enter the water of lakes and reservoirs, causing a large number of algae to multiply and seriously affecting the water production process. At present, research in the field of algae removal at home and abroad focuses on the optimization and strengthening of conventional coagulants, biological pre-oxidation and chemical pre-oxidation methods, etc. Biological pre-oxidation is to use bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F11/14
Inventor 李明玉刘丽娟
Owner JINAN UNIVERSITY
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