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Method for preparing metal chelating agent from glass fiber waste by modification and application of metal chelating agent

A metal chelating agent, glass fiber technology, applied in the directions of alkali metal compounds, non-metal elements, chemical instruments and methods, etc., can solve the problems of low recovery and treatment efficiency, difficult regeneration, cumbersome operation, etc., and achieve the effect of effective recovery and utilization

Inactive Publication Date: 2018-09-07
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial water treatment, chelating resins or chelating fibers are usually used to enrich and recover heavy metal ions. However, most of the chelating resins or chelating fibers currently used in industry have complex preparation processes, cumbersome operations, and high production costs. High, low recycling efficiency, difficult regeneration, etc.

Method used

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  • Method for preparing metal chelating agent from glass fiber waste by modification and application of metal chelating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The glass fiber waste modification prepares the method for metal chelating agent, comprises the following steps:

[0024] (1) Pretreatment: Take 100g of waste glass fiber solid powder, wash it twice with water, and filter; then add the filter cake to 500mL NaOH solution with a concentration of 0.5mol / L and boil for 30min, filter, wash with water until neutral, filter ; Then add 500mL concentration of filter cake to be the HNO of 0.5mol / L 3 Boil in the solution for 30 minutes, filter, wash with water until neutral, filter, and dry the filter cake at 100°C to obtain pretreated glass fiber powder;

[0025] (2) Amination reaction: Take 30 g of pretreated glass fiber waste in step (1) and add it to a flask, add 100 mL of solvent water to the flask, and then add 15 mL of amination modifier γ-(methacryloyloxy)propane Aminated with trimethoxysilane, then stirred at a speed of 200r / min, condensed and refluxed, stirred and reacted at 60°C for 8h, after the reaction was completed...

Embodiment 2

[0028] The method for preparing metal chelating agent by glass fiber waste modification comprises the following steps:,

[0029] (1) Pretreatment: Take 150g of glass fiber powder as solid powder and wash it with water for 3 times, filter; then add 600mL of Na 2 CO 3 Boil in the solution for 30min, filter, wash with water until neutral, filter; then add the filter cake to 600mL HCl solution with a concentration of 0.5mol / L, boil for 30min, filter, wash with water until neutral, filter, and dry the filter cake at 100°C , to obtain pretreated glass fiber powder;

[0030] (2) Amination reaction: Take 40 g of pretreated glass fiber waste in step (1) and add it to the flask, add 200 mL of the first solvent toluene to the flask, and then add 50 mL of the amination modifier γ-mercaptopropyltrimethoxy Aminated silane, then stirred at a speed of 200r / min, condensed and refluxed, stirred and reacted at 70°C for 10h, after the reaction was completed, washed with water and ethanol in seq...

Embodiment 3

[0033] The glass fiber waste modification prepares the method for metal chelating agent, comprises the following steps:

[0034] (1) Pretreatment: Take 300 g of glass fiber waste powder, wash it with water for 3 times, and filter; then add the filter cake to 1000 mL of KOH solution with a concentration of 1 mol / L, boil for 30 min, filter, wash with water until neutral, and filter; Then the filter cake was added with 1000mL concentration of 0.7mol / L H 2 SO 4 Boil in the solution for 20 minutes, filter, wash with water until neutral, filter, and dry the filter cake at 110°C to obtain pretreated glass fiber powder;

[0035](2) Amination reaction: Take 50 g of pretreated glass fiber waste in step (1) and add it to the flask, add 500 mL of the first solvent methanol to the flask, and then add 80 mL of the amination modifier γ-chloropropyl trimethoxy Aminated silane, then stirred at a speed of 400r / min, condensed and refluxed, stirred and reacted at 100°C for 12h, after the reacti...

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Abstract

The invention relates to a method for preparing metal chelating agent from glass fiber waste by modification. The method comprises the following steps: a) washing and filtering solid glass fiber wastepowder, adding filter cakes to an alkali solution for boiling, performing filtering and washing with water to neutrality, performing filtering, adding the filter cakes to an acid solution for boiling, performing filtering and washing with water to neutrality, and performing filtering and drying to obtain pre-treated bromo-glass fiber powder; b) adding the pretreated bromo-glass fiber powder to afirst solvent, adding an amination modifier, performing stirring and reflux condensing, performing washing with water and ethanol in sequence after reaction, and performing filtering and drying to obtain a modified aminated material; c) adding the modified aminated material to a second solvent, adding a chelating group modifier, adding an initiator, performing heating, stirring, reflux condensing,reacting, suction filtering and washing, and drying a product to constant weight to obtain a metal ion chelated material.

Description

technical field [0001] The invention relates to a method for a metal chelating agent, in particular to a method for preparing a metal chelating compound by modifying glass fiber waste and the application of the prepared metal chelating agent in recycling heavy metals from waste water. Background technique [0002] With the advancement of science and technology in our country and the rapid development of electronic technology, the replacement speed of electronic products is accelerating, and the waste generated is also increasing, and the discarded printed circuit boards contain a variety of halogenated substances that are harmful to the human body and the environment. substances and heavy metals. If these wastes are not handled properly and discarded at will, it will not only endanger human health, seriously pollute the ecological environment, but also cause a large loss of some resources. Therefore, how to recycle and dispose of these waste materials in a resourceful manne...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/103B01J20/28023C02F1/281C02F2101/20
Inventor 袁露胡潇雨孟勇卜嘉琪彭馨
Owner HUNAN NORMAL UNIVERSITY
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