Preparation method of flocculation decolorizing agent

A technology of decolorizing agent and flocculation, which is applied in the field of preparation of flocculation decolorizing agent, can solve problems such as unsightly, hindering plant photosynthesis, destroying aquatic biological ecosystem, etc., and achieves rapid separation, good magnetic response performance, and good magnetic separation performance Effect

Inactive Publication Date: 2021-07-13
金华市敬企科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The colorful printing and dyeing wastewater is not only unsightly, but also the dyes and other substances in the wastewater can absorb the sunlight entering the water, hinder the photosynthesis of plants, and destroy the ecosystem of aquatic organisms

Method used

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  • Preparation method of flocculation decolorizing agent
  • Preparation method of flocculation decolorizing agent
  • Preparation method of flocculation decolorizing agent

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preparation example Construction

[0032] The embodiment of the present disclosure provides a preparation method of a flocculation decolorizing agent, including the following steps:

[0033] Step 1, using solvothermal method to prepare magnetic Fe 3 o 4 Nanoparticles;

[0034] Step 2, using alliin and a silane coupling agent to obtain a modified silane coupling agent;

[0035] Step 3, using modified silane coupling agent to magnetic Fe 3 o 4 Nanoparticles modified to obtain modified magnetic Fe 3 o 4 Nanoparticles;

[0036] Step 4, using modified magnetic Fe 3 o 4 Nanoparticles and L-allylglycine are used to graft and copolymerize chitosan to obtain a flocculating decolorizing agent.

[0037] The preparation method of this embodiment uses chitosan as the main chain of grafting, and uses L-allylglycine, modified magnetic Fe 3 o 4 Nanoparticles are grafted comonomers, and a flocculating decolorizing agent is prepared. A large number of carboxyl, amino active groups and magnetic particles are introduced...

Embodiment 1

[0058] The preparation method of flocculating decolorizing agent comprises following steps:

[0059] Step 1, the FeCl 3 ·6H 2 O and sodium acetate were dissolved in ethylene glycol, polyethylene glycol was added and stirred vigorously until completely dissolved, then reacted at 200°C for 5 hours, cooled to room temperature, separated repeatedly with a magnet, washed 3 times with absolute ethanol, and dried to obtain Magnetic Fe 3 o 4 Nanoparticles; FeCl 3 ·6H 2 The consumption ratio of O, sodium acetate, ethylene glycol and polyethylene glycol is 1mmol: 3.2mmol: 8mL: 0.11mmol;

[0060] Step 2, add absolute ethanol to alliin and silane coupling agent KH560, react in an oil bath at 120°C under nitrogen protection for 6 hours, distill under reduced pressure, collect target fractions, and dry to obtain modified silane coupling agent; alliline The dosage ratio of acid, silane coupling agent KH560 and ethanol is 1.15mmol:1mmol:8mL;

[0061] Step 3, the magnetic Fe 3 o 4 Ult...

Embodiment 2

[0064] The preparation method of flocculating decolorizing agent comprises following steps:

[0065] Step 1, the FeCl 3 ·6H 2 Dissolve O and sodium acetate in ethylene glycol, add polyethylene glycol and stir vigorously until completely dissolved, then react at 220°C for 3 hours, cool to room temperature, separate repeatedly with a magnet, wash twice with absolute ethanol, and dry to obtain Magnetic Fe 3 o 4 Nanoparticles; FeCl 3 ·6H 2 The consumption ratio of O, sodium acetate, ethylene glycol and polyethylene glycol is 1mmol: 3.5mmol: 10mL: 0.12mmol;

[0066] Step 2, add absolute ethanol to alliin and silane coupling agent KH560, react in an oil bath at 110°C under nitrogen protection for 5 hours, distill under reduced pressure, collect target fractions, and dry to obtain modified silane coupling agent; The dosage ratio of acid, silane coupling agent KH560 and ethanol is 1.4mmol:1mmol:10mL;

[0067] Step 3, the magnetic Fe 3 o 4 Ultrasonic dispersion of nanoparticle...

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Abstract

The invention discloses a preparation method of a flocculation decolorizing agent, belonging to the technical field of flocculants. The preparation method comprises the following steps: 1, preparing magnetic Fe3O4 nanoparticles through a solvothermal method; 2, preparing a modified silane coupling agent from alliin and a silane coupling agent; 3, modifying the magnetic Fe3O4 nanoparticles by adopting the modified silane coupling agent to obtain modified magnetic Fe3O4 nanoparticles; and 4, carrying out a graft copolymerization reaction on chitosan by adopting the modified magnetic Fe3O4 nanoparticles and L-allylglycine to obtain the flocculation decolorizing agent. According to the preparation method, chitosan is taken as a grafting main chain and L-allylglycine and modified magnetic Fe3O4 nanoparticles are taken as grafting comonomers to prepare the flocculation decolorizing agent; and a large amount of carboxyl groups, amino active groups and magnetic particles are introduced to chitosan, so the chitosan-based flocculation decolorizing agent with multiple functions including a decolorizing function, a flocculation function, a sterilization function, salt tolerance, magnetic response performance and the like is prepared.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and in particular relates to a preparation method of a flocculant decolorizing agent. Background technique [0002] The wastewater produced by the printing and dyeing industry is a kind of industrial wastewater produced after the treatment of natural, synthetic and blended textiles. In order to obtain a better dyeing effect (color yield and uniformity), the chemical agents such as sodium sulfate, penetrating agent, hydrosulfite and various functional finishing agents added in the dyeing process are among the many dirt components. , the most serious water pollution is the dye. The dye not only has a specific color, but also has a complex structure. The aromatic rings, amine groups, nitro groups and some heavy metal atoms contained in the structure are toxic, which is harmful to human health and the growth of animals and plants. Dyes are difficult to degrade by themselves, and the degradation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F251/00C08F226/02C08F2/44C08K9/06C08K3/22C02F101/30C02F103/30
CPCC02F1/56C02F2101/308C02F2103/30C02F2303/04C08F2/44C08F251/00C08K3/22C08K9/06C08K2201/01C08K2201/011C08F226/02
Inventor 不公告发明人
Owner 金华市敬企科技有限公司
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