Method for preparing inorganic-organic composite flocculant made of polymeric aluminum and modified compound biological flocculant

A technology of biological flocculant and composite flocculant, which is applied in the field of environment and chemistry, can solve the problems of negative charge limitation of wide and effective use, difficulty in realizing large-scale use, and high cost of graft modification, so as to reduce the cost of graft modification. , The effect of wide dosage range and simple production process

Inactive Publication Date: 2013-09-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the obtained CBF-AM flocculant are low product yield, high graft modification cost, high water treatment cost, and difficulty in large-scale use. In addition, the composite bioflocculant grafted acrylamide flocculant ( CBF-AM) has a zeta potential of -20.0~0.0mV. Although the potential of CBF-AM has increased compared with the composite bioflocculant CBF itself, its negative charge still limits its wide and effective use.

Method used

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  • Method for preparing inorganic-organic composite flocculant made of polymeric aluminum and modified compound biological flocculant
  • Method for preparing inorganic-organic composite flocculant made of polymeric aluminum and modified compound biological flocculant
  • Method for preparing inorganic-organic composite flocculant made of polymeric aluminum and modified compound biological flocculant

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: Polymerized aluminum-modified composite bioflocculant inorganic-organic composite flocculant, the preparation method is as follows:

[0030] (1) Weigh 22.36g AlCl 3 ·6H 2 O solid in a beaker, add distilled water to dissolve, weigh Na 2 CO 3 4.91g was dissolved in water, and Na was added dropwise with stirring 2 CO 3 solution to AlCl 3 solution, stirred at room temperature to obtain a colorless transparent liquid, and prepared a PAC solution with a degree of alkalinity of 66%, dissolved AlCl 3 ·6H 2 O and Na 2 CO 3 The total amount of water used is 250ml.

[0031] (2) Weigh 1.0g of CBF, put it into a reactor equipped with a stirring device, add 30.0ml of deionized water to fully stir, and protect it under nitrogen. After the oxygen in the reaction vessel is exhausted, add the initiator potassium persulfate and place it in a water bath at 50°C Maintain the temperature for 15 minutes, then add sodium sulfite, acrylamide (AM) and dimethyl diallyl ammon...

Embodiment 2

[0033] Embodiment 2: As described in Embodiment 1, the difference is:

[0034] Take 4.47g AlCl respectively 3 ·6H 2 O solid and 1.47 g Na 2 CO 3 The powder is dissolved in water to form a solution, and the Na 2 CO 3 The solution was added dropwise to AlCl 3 In the solution, the total amount of water is 250ml to a predetermined alkalization degree of 50%, and a PAC solution is prepared. The PAC-MCBF inorganic-organic composite flocculant was prepared by taking the PAC solution and the MCBF solution (2.5g / L) at a ratio of Al:MCBF mass ratio of 1:1. The product is represented by No.2.

Embodiment 3

[0035] Embodiment 3: As described in Embodiment 1, the difference is:

[0036] Take 4.47g AlCl respectively 3 ·6H 2 O solid and 0.98 g Na 2 CO 3 The powder is dissolved in water to form a solution, and the Na 2 CO 3 The solution was added dropwise to AlCl 3 In the solution, the total amount of water is 250ml to a predetermined alkalization degree of 33%, and a PAC solution is prepared. The PAC-MCBF inorganic-organic composite flocculant was prepared by taking the PAC solution and the MCBF solution (2.5g / L) at a ratio of Al:MCBF mass ratio of 1:1. The product is represented by No.3.

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Abstract

The invention relates to an inorganic-organic composite flocculant made of polymeric aluminum and a modified compound biological flocculant and a method for preparing the inorganic-organic composite flocculant. The inorganic-organic composite flocculant is made by reaction of mixture of aluminum chloride and the modified compound biological flocculant according to the mass ratio of 1-8:1. The aluminum chloride is made by steps: dissolving AlCl3 6H2O raw material into distilled water, adding Na2CO3 for adjusting alkalinization level, and reacting at the normal temperature to obtain the aluminum chloride. The MCBF (modified compound biological flocculant) is made by graft copolymerization of compound biological flocculant, acrylamide and dimethyl diallyl ammonium chloride in initiator existence of potassium persulfate and sodium sulfite. The inorganic-organic composite flocculant integrates the advantage of high product stability of the MCBF and the advantages of wide feeding range, low water treatment cost and the like of the polymeric aluminum, can be widely used for fields of water supply wastewater treatment, papermaking, textile dyeing, daily chemicals and the like, and has fine water treatment effect.

Description

technical field [0001] The invention relates to a polyaluminum-modified composite biological flocculant inorganic-organic composite flocculant (PAC-MCBF) and a preparation process thereof, belonging to the technical field of environment and chemistry. Background technique [0002] Water treatment chemicals are the most widely used and the largest amount of high-tech content and high value-added products in the field of water industry, water pollution control and water-saving reuse purification engineering technology. New and efficient water treatment chemicals are always the environmental protection technology of water treatment The pillar industry that focuses on development in the field is also the basic industry for the innovation and development of water industry and water pollution control engineering technology and equipment. Inorganic-organic composite water treatment agent has the incomparable water purification effect of traditional water treatment agents, and has t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56C08F251/00
Inventor 高宝玉赵艳侠亓秋波王燕李倩岳钦艳薄晓文
Owner SHANDONG UNIV
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