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Konjac modified cationic dye flocculant, preparation method and application thereof

A technology of cationic dyes and flocculants, which is applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., can solve the problems of slow sedimentation speed and inability to quickly process dye wastewater, and achieve rapid sedimentation and difficult Secondary pollution, solve the effect of not easy to degrade

Inactive Publication Date: 2018-04-13
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defect of chitosan degradable coagulant to treat dye wastewater is that the sedimentation speed is slow, and it cannot quickly treat dye wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] It is a konjac modified cationic dye flocculant, and its preparation method is as follows:

[0022] Step 1 Synthesis of KGM-g-P(MAA-r-NVF)

[0023] Add 2 parts of konjac glucomannan (KGM) to 50 parts of water, control the temperature at 45°C, and dissolve for 0.5 hours; under the protection of nitrogen, add 0.1 part of the initiator azobisisobutylamidine hydrochloride V-50, 7 parts of methacrylic acid (MAA) and 4 parts of N-vinylformamide (NVF), polymerized for 3 hours, and the temperature was lowered to stop the reaction. Add 50 parts of ethanol to carry out precipitation separation, after filtering and drying, obtain highly pure konjac glucomannan-graft-poly(methacrylic acid-random-N-vinyl formamide) copolymer (KGM-g-P( MAA-r-NVF)); Elemental analysis and nuclear magnetic resonance instrument analysis are used to measure the grafting rate of methacrylic acid to 27%, and the grafting rate of N-vinylformamide is 6%;

[0024] Step 2 Synthesis of cyclohexanediaminetetra...

Embodiment 2

[0031] It is a konjac modified cationic dye flocculant, and its preparation method is as follows:

[0032] Step 1 Synthesis of KGM-g-P(MAA-r-NVF)

[0033]Add 3 parts of konjac glucomannan (KGM) to 150 parts of water, control the temperature at 55°C, and dissolve for 0.7 hours; under the protection of nitrogen, add 0.5 parts of the initiator azobisisobutylamidine hydrochloride V- 50, 15 parts of methacrylic acid (MAA) and 9 parts of N-vinyl formamide (NVF), graft copolymerization for 8 hours, cooling down to stop the reaction. Add 150 parts of ethanol to carry out precipitation separation, after filtering and drying, obtain highly pure konjac glucomannan-graft-poly(methacrylic acid-random-N-vinyl formamide) copolymer (KGM-g-P( MAA-r-NVF)); Elemental analysis and nuclear magnetic resonance instrument analysis were used to determine the grafting rate of methacrylic acid to be 45%, and the grafting rate of N-vinylformamide to be 11%;

[0034] Step 2 Synthesis of cyclohexanediami...

Embodiment 3

[0041] It is a konjac modified cationic dye flocculant, and its preparation method is as follows:

[0042] Step 1 Synthesis of KGM-g-P(MAA-r-NVF)

[0043] Add 4 parts of konjac glucomannan (KGM) to 180 parts of water, control the temperature at 65°C, and dissolve for 0.7 hours; under the protection of nitrogen, add 0.6 parts of the initiator azobisisobutylamidine hydrochloride V -50, 18 parts of methacrylic acid (MAA) and 14 parts of N-vinyl formamide (NVF), graft copolymerization for 16 hours, cooling down to stop the reaction. Add 180 parts of ethanol to carry out precipitation separation, after filtering and drying, obtain highly pure konjac glucomannan-graft-poly(methacrylic acid-random-N-vinyl formamide) copolymer (KGM-g-P( MAA-r-NVF)); Elemental analysis and nuclear magnetic resonance instrument analysis were used to determine the grafting rate of methacrylic acid to be 72%, and the grafting rate of N-vinylformamide to be 17%;

[0044] Step 2 Synthesis of cyclohexanedi...

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Abstract

The invention relates to a konjac modified cationic dye flocculant as well as a preparation method and application thereof, and is characterized in that the konjac modified cationic dye flocculant isprepared by konjac glucomannan, water, an initiator 2,2'-azobis(2-methylpropionamide)dihydrochloride V-50, methacrylic acid, N-vinylformamide, cyclohexanediaminetetraacetic acid dianhydride and sodiumhydroxide, and the konjac modified cationic dye flocculant is used for treating cationic dye wastewater discharged in dye synthesis or dyeing and finishing processes and wastewater discharged in theart coating industry. The flocculant has the advantages of being high in trapping capacity, high in sedimentation speed and capable of treating low-concentration complexing heavy metal ions, so that cationic dye molecules and complex heavy metal ions can be captured within several seconds, and large settling particles can be rapidly grown, so that the purpose of quickly separating cationic dyes and heavy metal ions is achieved, and the flocculant is non-toxic, environment-friendly and easy to degrade, the secondary pollution is not easy to cause in the using process, the operation is simple and convenient, the processing cost is low, the adaptability is high, and the like.

Description

technical field [0001] The invention belongs to the field of biomass materials and wastewater treatment, and in particular relates to a konjac modified cationic dye flocculant and its preparation method and application. It is mainly used in cationic dye wastewater and art paints discharged during dye synthesis or dyeing and finishing processes Used in industrial waste water. Background technique [0002] Traditional wastewater treatment methods include physical and chemical methods, chemical coagulation methods, physical adsorption methods, biochemical methods, and electrochemical methods. The chemical coagulation method is to add a coagulant to the dye wastewater to make the pollutants form colloidal particles, and remove the pollutants in the wastewater through coagulation precipitation or air flotation. The coagulation-sedimentation method is the most widely used in practice. Coagulation can simultaneously remove dye pollutants and other macromolecular suspended polluta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/06C08F226/02C08F8/10C08F8/12C02F1/58C02F1/62C02F101/30
CPCC08F8/10C02F1/58C02F1/62C02F2101/308C08F8/12C08F251/00C08F220/06C08F226/02
Inventor 刘锋霍应鹏陈燕舞张浥琨郭志杰洪丹彭琦唐秋实
Owner SHUNDE POLYTECHNIC
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