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Aluminum sulfate-poly-dimethyl diene propyl- ammonium chloride composite flocculent, preparation and application method thereof

A polydimethyldiallyl ammonium chloride, application method technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the limitation of the wide application and treatment effectiveness, unclear composition and content, polymer The structure is not clear and other problems, to achieve the effect of stable nature, convenient and concise use method, and clear content range

Inactive Publication Date: 2009-01-14
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] (1) The composition and content of other important components such as various metal salts, especially heavy metal salts, and harmful impurities in the main raw material aluminum sulfate are not clear, such as documents 1 to 3
[0016] (2) The polymer structure of the main raw material organic cationic polymer is not clear, such as document 2
Therefore, it limits its wide application and processing effectiveness when it is mixed with inorganic salts or used as a coagulant.
[0017] (3) Aluminum sulfate (AS) and organic cationic polymer composite coagulant are mixed and added before and after use, including adding immediately after mixing, adding at the same time and putting in successively, etc. It is not clearly stated that it should be made stable first The composite coagulant can be reused, such as Document 2 and Document 3; or the preparation of composite coagulant is pointed out, but the preparation method used is not clear, such as Document 1
[0019] It can be seen that the above-mentioned various shortcomings have caused the mixture or composite coagulant of existing aluminum sulfate (AS) and organic cationic polymers to still not become a class with clear composition structure, simple production process, stable product storage properties, Easy to use, superior application performance, wide applicability, safe and reliable, can be used for various raw water, especially micro-polluted, algae-containing, high-temperature and high-turbidity or low-temperature and low-turbidity raw water coagulation treatment and wastewater treatment and sludge, sludge dehydration process composite coagulant

Method used

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  • Aluminum sulfate-poly-dimethyl diene propyl- ammonium chloride composite flocculent, preparation and application method thereof
  • Aluminum sulfate-poly-dimethyl diene propyl- ammonium chloride composite flocculent, preparation and application method thereof
  • Aluminum sulfate-poly-dimethyl diene propyl- ammonium chloride composite flocculent, preparation and application method thereof

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preparation example Construction

[0038] In conjunction with the accompanying drawings, the aluminum sulfate-polydimethyldiallylammonium chloride composite coagulant of the present invention is prepared by the following method, that is, (1) put the dry powder or solution of aluminum sulfate AS in a mixing tank, add water Deployed to obtain the content of aluminum salt AS in Al 2 o 3 Calculate the AS solution whose mass fraction is 1.5% to 11.5%;

[0039] (2) Stir the AS solution at room temperature or under heating conditions, add polydimethyldiallyl ammonium chloride PDMDAAC colloid or dry powder with a characteristic viscosity value ranging from 1.0 to 4.7 dL / g, and its solid content is measured by mass fraction 20% to 75% or (92±2)% respectively, and make Al in the mixed solution 2 o 3 The mass ratio with PDMDAAC is 20.0:1~2.0:1;

[0040] (3) Stir the mixed solution at normal temperature or under heating until the PDMDAAC colloid is completely dissolved to obtain a stable aluminum sulfate-polydimethyldi...

Embodiment 1

[0045] Embodiment 1: in conjunction with accompanying drawing, aluminum sulfate (AS)-polydimethyldiallylammonium chloride (PDMDAAC) composite coagulant of the present invention and its preparation and application method are:

[0046] In the first step, aluminum sulfate (AS), whose molecular formula is Al 2 (SO 4 ) 3 ·xH 2 O, where: x is a natural number. Add water to adjust to make AS content Al 2 o 3 The mass fraction is calculated as (8.0±0.1)% solution;

[0047] In the second step, the AS solution is stirred at room temperature at -5 to 25°C, and the solid content is (65±5)% in terms of mass fraction, and the characteristic viscosity value ranges from 1.0 to 4.7dL / g (30.0±5)% into the solution. 0.1°C, measured in 1mol / L NaCl solution) polydimethyldiallyl ammonium chloride (PDMDAAC) colloid solution, make AS (as Al 2 o 3 The mass ratio of total) to PDMDAAC is 20.0:1~2.0:1;

[0048] The third step is to stir and mix the above mixed solution at room temperature at -5 ...

Embodiment 2

[0065] Embodiment 2: in conjunction with accompanying drawing, ammonium sulfate (AS)-polydimethyldiallyl ammonium chloride (PDMDAAC) composite coagulant of the present invention and its preparation and application method are:

[0066] In the first step, the aluminum sulfate (AS) required by the quality index national chemical industry standard (HG2227-2004) is placed in the mixing reactor, and its molecular formula is Al 2 (SO 4 ) 3 ·xH 2 O, where: x is a natural number. Add water to adjust to make AS content Al 2 o 3 The mass fraction is calculated as (11.4±0.1)% solution.

[0067] In the second step, the AS solution is stirred at room temperature at 15-35°C, and the solid content is (25±5)% in mass fraction, and the characteristic viscosity range is 1.0-4.7dL / g (30.0±0.1 ℃, measured in 1mol / L NaCl solution) polydimethyldiallyl ammonium chloride (PDMDAAC) colloid solution, make AS (as Al 2 o 3 The mass ratio of total) to PDMDAAC is 20.0:1~2.0:1;

[0068] The third st...

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Abstract

The invention discloses an aluminum sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant as well as a preparation and application method thereof, the coagulant is to position an aluminum sulfate AS dry powder or a solution in a mixing tank, and add water thereto to prepare an AS solution; the AS solution is agitated under normal temperature or heating condition and is added with PDMDAAC colloid or dry powder; and the mixed solution is agitated under normal temperature or heating condition until the PDMDAAC colloid or dry powder is fully dissolved, so as to get the stable aluminum sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant. The application is to cast the aluminum sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant diluted by water at any proportion or directly cast the coagulant in the process of treatment of various raw water and wastewater as well as the dehydration treatment of sludge and silt. The compound coagulant has a clear composition structure and can control the impurity content, and can replace the aluminum sulfate for playing a role in reducing the use cost of medicament and enhancing the coagulation, as well as improving a plurality of functions of the treated water; and the compound coagulant can be stored under normal temperature for a long time, the application performance will not be changed, and the performance is stable.

Description

a technical field [0001] The invention relates to a compound preparation technology of an inorganic salt coagulant and a water-soluble organic cationic polymer, in particular to an aluminum sulfate-polydimethyldiallylammonium chloride composite coagulant and its preparation and application methods. Two background technology [0002] Aluminum Sulfate (Aluminum Sulfate, AS) is a widely used inorganic brine treatment agent, its molecular formula is as follows: [0003] al 2 (SO 4 ) 3 ·xH 2 O (Formula 1) [0004] Among them, x is a natural number, the relative molecular mass of AS [in Al 2 (SO 4 ) 3 Count]: 342.15 [0005] As a water treatment agent, aluminum sulfate is a traditional low-molecular-weight aluminum salt. It is still used by some water plants because of its low price and the turbidity removal effect can still meet the requirements when the water temperature is appropriate. However, there is a large amount of dosage during use, resulting in a large amount ...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 张跃军赵晓蕾李潇潇
Owner NANJING UNIV OF SCI & TECH
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