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
7 Cites 0 Cited by

AI-Extracted 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 fi...
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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.

Application Domain

Technology Topic

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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(7)
  • Effect test(1)

Example Embodiment

[0022] Example 1
[0023] The method for preparing a metal chelating agent by modifying glass fiber waste includes 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 to neutral, filter ; Then add 500mL HNO with a concentration of 0.5mol/L to the filter cake 3 Boil the solution for 30 minutes, filter, wash until neutral, filter, and dry the filter cake at 100°C to obtain pretreated glass fiber powder;
[0025] (2) Amination reaction: Take 30g of the glass fiber waste pretreated in step (1) and put it into the flask, add 100mL solvent water to the flask, and then add 15mL aminating modifier γ-(methacryloxy) propylene After the reaction is completed, it is washed with water and ethanol, filtered, and dried at 100℃ to obtain the modified product by stirring at 200r/min, condensing and refluxing, and stirring at 60℃ for 8h. Aminated material;
[0026] (3) Preparation of metal chelating adsorption resin: Take 5 g of the modified aminated material obtained in step (2) and add it to 300 mL of the second solvent ethanol and place it in a 1500 mL three-necked flask, and then add 5 mL of chelating group modifier Methacrylic acid, then add 0.165g initiator ammonium persulfate, heat to 40°C, stir, reflux, react for 12h, filter with suction, wash with deionized water and ethanol for 2 to 3 times, and dry at 110°C to constant weight. Get metal chelating agent A.

Example Embodiment

[0027] Example 2
[0028] The method for preparing a metal chelating agent by modifying glass fiber waste includes the following steps:
[0029] (1) Pretreatment: Take 150g of glass fiber powder and wash the solid powder with water 3 times and filter; then add 600mL Na with a concentration of 0.7mol/L to the filter cake 2 CO 3 Boil the solution for 30 minutes, filter, wash with water until it is neutral, and filter; then add the filter cake to 600mL of 0.5mol/L HCl solution and boil for 30 minutes, filter, wash with water until it is neutral, filter, and dry the filter cake at 100°C , Get pre-treated glass fiber powder;
[0030] (2) Amination reaction: Take 40g of the glass fiber waste pretreated in step (1) and add it to the flask, add 200mL of the first solvent toluene to the flask, and then add 50mL of the aminating modifier γ-mercaptopropyltrimethoxy The base silane was aminated, then stirred at 200r/min, condensed and refluxed, and stirred at 70°C for 10h. After the reaction, washed with water and ethanol, filtered, and dried at 100°C to obtain modified aminated material ;
[0031] (3) Preparation of metal chelating adsorption resin: 3g of the modified aminated material obtained in step (2) was added to 500mL of the second solvent water and placed in a 1500ml three-necked flask, and then 10ml of chelating group modifier chlorine was added. Acetic acid, then add 0.1g initiator (benzoyl peroxide, heat to 50℃, stir, condense and reflux, react for 10h, filter with suction, wash with deionized water and ethanol for 2 to 3 times, and dry at 110℃ to constant weight , Get metal chelating agent B.

Example Embodiment

[0032] Example 3
[0033] The method for preparing a metal chelating agent by modifying glass fiber waste includes the following steps:
[0034] (1) Pretreatment: Take 300g of glass fiber waste powder, wash it with water 3 times, and filter; then add the filter cake to 1000mL of 1mol/L KOH solution and boil for 30min, filter, wash with water to neutral, and filter; Then add 1000mL of the filter cake to 0.7mol/L H 2 SO 4 Boil the solution for 20 minutes, filter, wash until neutral, filter, and dry the filter cake at 110°C to obtain pretreated glass fiber powder;
[0035] (2) Amination reaction: Take 50g of the pretreated glass fiber waste in step (1) and add it to the flask, add 500mL of the first solvent methanol to the flask, and then add 80mL of the aminating modifier γ-chloropropyltrimethoxy The base silane is aminated, then stirred at 400r/min, condensed and refluxed, and stirred at 100°C for 12h. After the reaction, washed with water and ethanol, filtered, and dried at 100°C to obtain modified aminated material ;
[0036] (3) Preparation of metal chelating adsorption resin: Take 4g of the modified aminated material obtained in step (2) and add it to 200mL of the second solvent ethylene glycol and place it in a 1500ml three-necked flask, and then add 30ml of chelating group modification Acrylonitrile, add 0.2g initiator azobisisobutyronitrile, heat to 60℃, stir, condense and reflux, react for 8h, filter with suction, wash with deionized water and ethanol for 2 to 3 times, and dry at 100℃ To constant weight, metal chelating agent C is obtained.
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PUM

PropertyMeasurementUnit
Concentration0.5mol/l
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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