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Preparation method of starch-based flocculating agent

A flocculant, starch-based technology, applied in the field of preparation of starch-based flocculants, can solve the problems of living environment and life safety hazards, achieve good flocculation effect, be beneficial to environmental protection, and invest less equipment.

Inactive Publication Date: 2012-12-12
湖北顶新环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While industrial development brings economic growth and material abundance to people, it also puts enormous pressure on the non-renewable water resources on which human beings depend, and the direct discharge of unpurified sewage has a negative impact on people's survival. Great harm to the environment and life safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of starch-based flocculant, comprising the following steps:

[0022] 1) Put starch (corn starch) in 60 In the Co-γ irradiation field, irradiate under aerobic conditions (such as under air conditions), and the irradiation dose is 6KGy (the radiation dose is fixed, then the time is fixed), so that the starch produces free radicals and obtains the desired Irradiated starch; the starch is cornstarch with a viscosity of 46mp·s and a water content of 13.14wt%;

[0023] 2) be 100% of pre-irradiated starch quality by the add-on of grafted monomer, select pre-irradiated starch and grafted monomer; Be 1: 1 by the mass ratio of pre-irradiated starch and water (deionized water) , choose water; Wherein, grafting monomer is acrylamide and acryloyloxyethyltrimethylammonium chloride, and the mass ratio of acrylamide and acryloyloxyethyltrimethylammonium chloride is 5:5;

[0024] Put the pre-irradiated starch in the mixer, put the grafted monomer in the mixer, add...

Embodiment 2

[0029] A preparation method of starch-based flocculant, comprising the following steps:

[0030] 1) Place starch in 60 In the Co-γ irradiation field, irradiate under aerobic conditions (such as under air conditions), and the irradiation dose is 8KGy, so that the starch produces free radicals and obtains pre-irradiated starch; the starch is cornstarch, and the viscosity is 46mp·s, moisture content 13.14wt%;

[0031] 2) be 100% of pre-irradiated starch quality by the add-on of grafted monomer, select pre-irradiated starch and grafted monomer; Be 1: 1.5 by the mass ratio of pre-irradiated starch and water (deionized water) , choose water; Wherein, grafting monomer is acrylamide and acryloyloxyethyltrimethylammonium chloride, and the mass ratio of acrylamide and acryloyloxyethyltrimethylammonium chloride is 5:5;

[0032] Put the pre-irradiated starch in the mixer, put the grafted monomer in the mixer, add water (deionized water), start the machine to stir until it is evenly stir...

Embodiment 3

[0037] A preparation method of starch-based flocculant, comprising the following steps:

[0038] 1) Place starch in 60 In the Co-γ irradiation field, irradiation is carried out under aerobic conditions, and the irradiation dose is 6KGy, so that the starch generates free radicals to obtain pre-irradiated starch; the starch is corn starch, with a viscosity of 46mp s and a water content of 13.14 wt%;

[0039] 2) be 70% of pre-irradiated starch quality by the add-on of grafted monomer, select pre-irradiated starch and grafted monomer; Be 1: 2 by the mass ratio of pre-irradiated starch and water (deionized water) , choose water; Wherein, grafting monomer is acrylamide and acryloyloxyethyltrimethylammonium chloride, and the mass ratio of acrylamide and acryloyloxyethyltrimethylammonium chloride is 5:5;

[0040] Put the pre-irradiated starch in the mixer, put the grafted monomer in the mixer, add water (deionized water), start the machine to stir until it is evenly stirred, and obt...

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Abstract

The invention relates to a preparation method of a starch-based flocculating agent. The preparation method of the starch-based flocculating agent is characterized by comprising the following steps of: 1) irradiating starch in a 60Co-gamma irradiation field to obtain pre-irradiated starch; 2) putting the pre-irradiated starch and a grafting monomer into a mixer, adding water into the mixer, and starting the mixer to stir so as to obtain a mixture, wherein the added amount of the grafting monomer is 50 to 100 percent of the mass of the pre-irradiated starch, and the mass ratio of the pre-irradiated starch to the water is 1:1-1:3; 3) putting the uniformly stirred mixture into a microwave oven, and applying intermittent microwaves to the mixture for 1 to 3 minutes to ensure that starch free radicals react with active groups on the grafting monomer to generate grafting starch; and 4) baking the grafting starch after microwave treatment for 5 to 10 hours at 80 to 140 DEG C, and crushing to obtain the starch-based flocculating agent. The preparation method is simple in process, less in investment equipment and low in cost, and can obtain a good flocculating effect; besides, a flocculation is easy to separate and does not cause secondary pollution to the environment.

Description

technical field [0001] The invention belongs to the technical field of natural polymer flocculants, in particular to a preparation method of a starch-based flocculant. Background technique [0002] With the rapid growth of the domestic economy, industrial water consumption continues to increase, and industrial wastewater is also produced in large quantities. According to statistics, the total discharge of industrial and urban domestic wastewater in the country in 2001 alone was 42.84 billion tons, of which industrial wastewater discharge was 20.07 billion tons. Accounting for 46.7% of the total wastewater discharge. In 2008, the national industrial wastewater discharge amounted to 24.17 billion tons, of which more than 30% of the wastewater was discharged directly into rivers, lakes and seas without treatment. Equivalent to 0.4% of water withdrawal. While industrial development brings economic growth and material abundance to people, it also puts enormous pressure on the n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
Inventor 王晓广汤月华吴海燕文雯
Owner 湖北顶新环保新材料有限公司
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