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Graft modified natural polymer flocculant as well as preparation method and applications thereof

A natural polymer and graft modification technology, applied in the field of environmental chemical water treatment agents, can solve problems such as no relevant literature reports, achieve good flocculation effect, improve removal rate, and overcome the effect of strong negative charge

Active Publication Date: 2015-04-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no related literature reports in domestic and foreign literature databases

Method used

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  • Graft modified natural polymer flocculant as well as preparation method and applications thereof
  • Graft modified natural polymer flocculant as well as preparation method and applications thereof
  • Graft modified natural polymer flocculant as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, the preparation of grafted modified natural polymer flocculant SA-AM-DMDAAC under different initiator dosage conditions, comprises the steps as follows:

[0041](1) Weigh 1.0g of natural sodium alginate SA, add 100mL deionized water and stir fully at a temperature of 50°C. After the sodium alginate is completely dissolved in water, add it into a reactor equipped with a stirring device, and protect , after the oxygen in the reactor is exhausted, add 1.5g of acrylamide (half of the mass involved in the reaction) and 3mL of dimethyl diene propylene ammonium chloride mixed solution, continue to pass nitrogen for 15min, remove the oxygen in the reactor, add trigger Agent ammonium persulfate, so that the concentration of the initiator in the reaction system is 2, 4, 6, 8, 10mmol / L respectively, under the condition of continuous nitrogen flow, it is initiated for 15min, and then the remaining 1.5g of acrylamide is dissolved in water, Add it dropwise into the reac...

Embodiment 2

[0045] Embodiment 2, the preparation of the graft-modified natural polymer flocculant (SA-AM-DMDAAC) of different acrylamide addition amount:

[0046] The same as described in Example 1, the difference is that the amount of initiator is fixed at 6mmol / L, and the amount of acrylamide in the whole process is 1g, 2g, 3g, 4g, 5g respectively, that is to say, flocculation with different amounts of acrylamide added agent products.

Embodiment 3

[0047] Embodiment 3, the preparation of the graft-modified natural polymer flocculant (SA-AM-DMDAAC) of different dimethyl diallyl ammonium chloride addition amount:

[0048] The same as in Example 2, the difference is that the amount of acrylamide in the whole process is fixed at 3g, and the addition amounts of dimethyldiallyl ammonium chloride are respectively 1mL, 2mL, 3mL, 4mL, and 5mL to obtain two Flocculant products with different amounts of methyldiallylammonium chloride added.

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Abstract

The invention relates to a graft modified natural polymer flocculant as well as a preparation method and applications thereof. The flocculant is prepared by graft copolymerization of sodium alginate (SA), acrylamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC), wherein the mass ratio of sodium alginate (SA), acrylamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) is 1:(1-5) (1-5). The flocculant applied to a water treatment field has the advantages of simple production process, economy, wide application scope, safety and no toxicity, and has a good water treatment effect.

Description

Technical field: [0001] The invention relates to a composite natural polymer flocculant (SA-AM-DMDAAC) grafted with acrylamide and dimethyldiallyl ammonium chloride, a preparation method and application thereof, and belongs to the technical field of environmental chemical water treatment agents. Background technique: [0002] With the rapid development of industry and agriculture, the population has increased rapidly, and the water resources that human beings rely on for survival have become increasingly scarce. Water resource crisis has become an important factor restricting my country's economic development. At present, my country's water resources are subject to varying degrees of pollution, and there is a growing trend. In order to save water resources, improve water utilization, and reduce environmental pollution caused by waste water, we must strengthen the treatment of industrial waste water and domestic sewage. In the water treatment process, coagulation sedimentat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F251/00C08F220/56C08F226/02
CPCC02F1/56C08F251/00C08F220/56C08F226/02
Inventor 王燕孙阳阳李瑞华高宝玉岳钦艳李倩
Owner SHANDONG UNIV
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