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Preparation method for modified efficient polyaluminum chloride macromolecule inorganic flocculent

A technology of polyaluminum chloride and inorganic flocculants, which is applied in the fields of chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc. It can solve the problems of complex preparation process, high cost of modifying agent, and lack of relevant literature. Many problems, to achieve the effect of improving flocculation performance, improving turbidity, and good economic benefits

Inactive Publication Date: 2016-12-21
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modifier cost of the above method is high, and the preparation process is complicated.
However, there are few studies on the addition of metal manganese, and there are not many related literatures.

Method used

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  • Preparation method for modified efficient polyaluminum chloride macromolecule inorganic flocculent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Raw material: AlCL 3 6H 2 O(A.R); NaOH(A.R); MnCl 2 4H 2 O(A.R);

[0029] Configuration of aluminum chloride solution: Accurately weigh 534.0g of 4mol crystalline aluminum chloride (accurate to 0.0001g), dissolve it in 4L aqueous solution, and prepare a 1mol / L aluminum chloride aqueous solution with an accurate concentration. Ready to use after dissolving completely.

[0030] Sodium hydroxide solution configuration: Accurately weigh 480.0g of 12mol crystalline sodium hydroxide (accurate to 0.0001g), dissolve it in 12L aqueous solution, and configure it into a 1mol / L sodium hydroxide aqueous solution with an accurate concentration. Ready to use after dissolving completely.

[0031] Manganese chloride solution configuration: Accurately weigh 1g of 1mol crystalline manganese chloride (accurate to 0.0001g), dissolve it in 1L aqueous solution, and prepare a 1mol / L manganese chloride aqueous solution with precise concentration, and dissolve it at 20-25°C Ready to use ...

Embodiment 2

[0038] Raw material: AlCL 3 6H 2 O(A.R); NaOH(A.R); MnCl 2 4H 2 O(A.R);

[0039] Configuration of aluminum chloride solution: Accurately weigh 801.0g of 6mol crystalline aluminum chloride (accurate to 0.0001g), dissolve it in 6L aqueous solution, and prepare a 1mol / L aluminum chloride aqueous solution with an accurate concentration. Ready to use after dissolving completely.

[0040] Sodium hydroxide solution configuration: Accurately weigh 600.0g of 15mol crystalline sodium hydroxide (accurate to 0.0001g), dissolve it in 15L aqueous solution, and configure it into a 1mol / L sodium hydroxide aqueous solution with an accurate concentration. Ready to use after dissolving completely.

[0041] Manganese chloride solution configuration: Accurately weigh 1g of 1mol crystalline manganese chloride (accurate to 0.0001g), dissolve it in 1L aqueous solution, and prepare a 1mol / L manganese chloride aqueous solution with an accurate concentration, and dissolve it at 20-25°C Ready to ...

Embodiment 3

[0048] Raw material: AlCL 3 6H 2 O(A.R); NaOH(A.R); MnCl 2 4H 2 O(A.R);

[0049] Configuration of aluminum chloride solution: Accurately weigh 667.5g of 5mol crystalline aluminum chloride (accurate to 0.0001g), dissolve it in 5L aqueous solution, and prepare a 1mol / L aluminum chloride aqueous solution with an accurate concentration. Ready to use after dissolving completely.

[0050] Sodium hydroxide solution configuration: Accurately weigh 560.0g of 14mol crystalline sodium hydroxide (accurate to 0.0001g), dissolve it in 14L aqueous solution, and configure it into a 1mol / L sodium hydroxide aqueous solution with an accurate concentration. Ready to use after dissolving completely.

[0051] Manganese chloride solution configuration: Accurately weigh 1g of 1mol crystalline manganese chloride (accurate to 0.0001g), dissolve it in 1L aqueous solution, and prepare a 1mol / L manganese chloride aqueous solution with an accurate concentration, and dissolve it at 20-25°C Ready to ...

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Abstract

The invention provides a preparation method for a modified efficient polyaluminum chloride macromolecule inorganic flocculent. The specific method comprises the following steps: firstly, respectively preparing AlCl3.6H2O, MnCl2.4H2O and NaOH into 1mol / L aqueous solutions (in molar concentration), mixing the AlCl3.6H2O aqueous solution with the MnCl2.4H2O aqueous solution, then slowly dropwise adding the NaOH aqueous solution, and stirring the mixed solution while dropwise adding the NaOH aqueous solution, wherein the initial stirring speed is 200r / min-300r / min, and the final stirring speed is increased to 780r / min-820r / min; simultaneously controlling the reaction temperature at 20 DEG C-25 DEG C; and after dropwise adding of the NaOH aqueous solution is finished, further stirring, and keeping aging for 30-60 minutes. Through adding a small amount of manganese metallic ions into aluminum chloride and simultaneously controlling the alkalisation degree of the mixture solution at 2.0-2.5, the flocculent property can be improved, so that the flocculant has relatively high polymerization degree and quite high flocculation capability.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of a modified high-efficiency polyaluminum chloride polymer inorganic flocculant. Background technique [0002] In order to meet the needs of different water quality deep purification treatment technologies, new high-efficiency coagulants have always been a hot spot in the research and development of water treatment at home and abroad. Since the advent of polyaluminum chloride (PAC), it has been widely used in water treatment. However, due to the slow settling of flocs in PAC, the treatment effect on low temperature and low turbidity water is not good, so it is often necessary to improve its coagulation performance by modification. . At present, the following two modification methods are often used: ① During the manufacturing process of PAC, one or more anions are introduced to change the morphology and distribution of the polymer to a certain extent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5245C02F1/5236
Inventor 王喜全杨轲
Owner UNIV OF SCI & TECH LIAONING
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