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Konjac modified dye flocculant, and preparation method and application of flocculant

A flocculant and dye technology, applied in chemical instruments and methods, flocculation/precipitation water/sewage treatment, water pollutants, etc., can solve the problems of inability to quickly treat dye wastewater and slow sedimentation speed, and achieve low treatment cost and low residual The effect of small amount and high-efficiency capture

Inactive Publication Date: 2018-04-06
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

[0022] It is a konjac modified dye flocculant, and the preparation steps are as follows:

[0023] Step 1: Synthesis of KGM-g-P (AA-r-DMAEMA-r-NVF)

[0024] Add 2 parts of konjac glucomannan (KGM) into 50 parts of water, control the temperature at 40°C, and dissolve for 0.5 hours; under the protection of nitrogen, add 0.1 part of initiator azobisisobutylamidine hydrochloride V- 50, 8 parts of acrylic acid (AA), 8 parts of dimethylaminoethyl methacrylate (DMAEMA) and 5 parts of N-vinyl formamide (NVF), graft copolymerization for 2 hours, cooling to stop the reaction; add 50 Part of ethanol was separated by precipitation, filtered and dried to obtain high-purity konjac glucomannan-graft-poly(acrylic acid-random-dimethylaminoethyl methacrylate-random-N-vinylformamide) ) Copolymer (KGM-gP(AA-r-DMAEMA-r-NVF)), where g represents grafting and r represents random copolymerization. Elemental analysis and nuclear magnetic resonance instrument analysis were used to determine that the grafti...

Embodiment 2

[0032] It is a konjac modified dye flocculant, and the preparation steps are as follows:

[0033] Step 1: Synthesis of KGM-g-P (AA-r-DMAEMA-r-NVF)

[0034] Add 3 parts of konjac glucomannan (KGM) into 100 parts of water, control the temperature at 50°C, and dissolve for 0.7 hours; under the protection of nitrogen, add 0.4 parts of initiator azobisisobutylamidine hydrochloride V -50, 14 parts of acrylic acid (AA), 14 parts of dimethylaminoethyl methacrylate (DMAEMA) and 10 parts of N-vinyl formamide (NVF), graft copolymerization for 8 hours, cooling to stop the reaction; add 100 parts of ethanol were separated by precipitation, filtered and dried to obtain high-purity konjac glucomannan-graft-poly(acrylic acid-random-dimethylaminoethyl methacrylate-random-N-vinylmethyl) Amide) copolymer (KGM-gP(AA-r-DMAEMA-r-NVF)), where g stands for graft and r stands for random copolymerization; the grafting rate of acrylic acid is determined to be 39% by elemental analysis and nuclear magnetic r...

Embodiment 3

[0042] It is a konjac modified dye flocculant, and the preparation steps are as follows:

[0043] Step 1: Synthesis of KGM-g-P (AA-r-DMAEMA-r-NVF)

[0044] Add 4 parts of konjac glucomannan (KGM) into 150 parts of water, control the temperature at 60°C, and dissolve for 0.9 hours; under the protection of nitrogen, add 0.6 parts of initiator azobisisobutylamidine hydrochloride V -50, 16 parts of acrylic acid (AA), 16 parts of dimethylaminoethyl methacrylate (DMAEMA) and 15 parts of N-vinyl formamide (NVF), graft copolymerization for 10 hours, cooling to stop the reaction; add 150 parts of ethanol were precipitated and separated, filtered and dried to obtain high-purity konjac glucomannan-graft-poly(acrylic acid-random-dimethylaminoethyl methacrylate-random-N-vinylmethyl) Amide) copolymer (KGM-gP(AA-r-DMAEMA-r-NVF)), where g represents grafting and r represents random copolymerization; the grafting rate of acrylic acid is determined to be 55% by elemental analysis and nuclear magnet...

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Abstract

The invention relates to a konjac modified dye flocculant, and a preparation method and application of the flocculant. The konjac modified dye flocculant is characterized by being prepared from konjacglucomannan, water, an initiator 2,2'-azobis(2-methylpropionamide)dihydrochloride V-50, acrylic acid, dimethylaminoethyl methacrylate, N-vinylformamide, cyclohexane diamine tetraacetic acid dianhydride and potassium hydroxide, and the konjac modified dye flocculant is used for treating dye wastewater or artistic coating wastewater discharged during dye synthesis or dyeing and finishing processes.The konjac modified dye flocculant has the advantages that the capturing capacity is strong, the sedimentation speed is fast, complex heavy metal ions can be treated, dye molecules can be captured within a plurality of seconds, large sedimented particles can be grown rapidly, so that the purpose of rapid dye separation can be realized, the flocculant is nontoxic, environmentally friendly and easyto degrade, secondary pollution is not easily caused in a 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 material and dye wastewater treatment, and specifically relates to a konjac modified dye flocculant and a preparation method and application thereof. It is mainly used in dye wastewater or artistic coating wastewater discharged during dye synthesis or dyeing and finishing. Application, can achieve simultaneous removal of cationic dyes, anionic dyes and complex heavy metal ions. Background technique [0002] In recent years, my country’s annual sewage discharge has reached more than 39 billion tons, of which industrial sewage accounted for 51%, and dye wastewater accounted for 35% of the total industrial waste water discharge, and it is increasing at a rate of 1% year by year. Dye wastewater mainly comes from dye synthesis and dye use enterprises, and consists of dyes and auxiliaries discharged during synthesis or dyeing and finishing. With the rapid development of the printing and dyeing industry, my country is...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F101/20C02F101/30C02F101/34C02F101/38
CPCC02F1/56C02F2101/20C02F2101/308C02F2101/34C02F2101/38C02F2101/40
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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