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Shell-core magnetic lignin-modified phenolic microsphere adsorbent and preparation method thereof

A technology of phenolic microspheres and lignin, which can be used in the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., and can solve problems such as loss of magnetism

Active Publication Date: 2017-12-15
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This curing method is difficult to apply to the preparation of magnetic resin composite microspheres. The main reason is that the magnetic ferroferric oxide is easy to dissolve under acidic conditions and loses its magnetism.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take 0.4mol / L FeCl 3 Solution 50ml, 0.2mol / L FeCl 2 Solution 50ml, mixed FeCl in a three-necked flask 3 solution and FeCl 2 The solution was fully stirred at a temperature of 70° C. for 10 minutes, and then 50 mL of a 3 mol / L NaOH solution was added to continue the reaction for 30 minutes. The obtained product was adjusted to neutrality, and a magnetic field was used to separate the product and water, and all the products were transferred to a 50ml volumetric flask to prepare a solution for future use.

[0014] Weigh 8g of lignosulfonate and 12g of phenol into a three-necked flask, measure 9ml of 5mol / L NaOH solution into the three-necked flask, and fully stir at a temperature of 65°C for 10min. Weighed 19ml of 37% formaldehyde (w / v) solution and slowly added it dropwise to a three-necked flask, continued the reaction for 40 minutes, adjusted the temperature to 92°C and continued the reaction for 60 minutes to obtain a lignin-modified phenolic resin solution.

[001...

Embodiment 2

[0017] Take 0.6mol / L FeCl 3 Solution 50ml, 0.3mol / L FeCl 2 Solution 50ml, mixed FeCl in a three-necked flask 3 solution and FeCl 2 The solution was fully stirred at a temperature of 70° C. for 10 minutes, and then 70 mL of a 3 mol / L NaOH solution was added to continue the reaction for 30 minutes. The obtained product was adjusted to neutrality, and a magnetic field was used to separate the product and water, and all the products were transferred to a 50ml volumetric flask to prepare a solution for future use.

[0018] Weigh 10g of lignosulfonate and 12g of phenol into a three-necked flask, measure 12ml of 5mol / L NaOH solution into the three-necked flask, and fully stir at a temperature of 60°C for 20min. Weighed 20ml of 37% formaldehyde (w / v) solution and slowly added it dropwise to a three-neck flask, continued the reaction for 45 minutes, adjusted the temperature to 92°C and continued the reaction for 45 minutes to obtain a lignin-modified phenolic resin solution.

[001...

Embodiment 3

[0021] Take 0.8mol / L FeCl 3 Solution 50ml, 0.3mol / L FeCl 2 Solution 50ml, mixed FeCl in a three-necked flask 3 solution and FeCl 2 The solution was fully stirred at a temperature of 80° C. for 10 minutes, and then 90 mL of 3 mol / L NaOH solution was added to continue the reaction for 30 minutes. The obtained product was adjusted to neutrality, and a magnetic field was used to separate the product and water, and all the products were transferred to a 50ml volumetric flask to prepare a solution for future use.

[0022] Weigh 12g of alkali lignin and 12g of phenol into a three-necked flask, measure 15ml of NaOH solution into the three-necked flask, and fully stir at a temperature of 65° C. for 10 min. Weighed 25ml of 37% formaldehyde (w / v) solution and slowly added it dropwise to a three-necked flask, continued the reaction for 50 minutes, adjusted the temperature to 90°C and continued the reaction for 50 minutes to obtain a lignin-modified phenolic resin solution.

[0023] Ta...

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Abstract

The invention belongs to the technical field of functional materials, and mainly relates to a method for preparing a shell-core magnetic composite resin microsphere adsorbent with lignin-modified phenolic resin under an acid condition. The method includes the following steps: magnetic ferroferric oxide particles and lignin phenolic resin are first prepared, the ferroferric oxide particles and the lignin phenolic resin are uniformly mixed according to a certain proportion, a certain amount of reversed-phase solvent and surfactant is added, uniform stirring is sufficiently carried out, p-toluenesulfonic acid solution is then added, acid curing is carried out under certain temperature and stirring speed, and thereby magnetic microspheres are formed. The invention adopts an organic acid with weak acidity as acid curing agent and creatively adopts an acid low-temperature curing method to prepare the composite microspheres with uniform size by means of a reversed-phase suspension method. The microspheres have magnetism and the adsorption property of lignin, and can serve as an adsorbent to adsorb colored matters and heavy metal ions in wastewater, moreover, an additional magnet can be utilized to rapidly carry out the separation of water and the microspheres, and thereby a convenient and efficient separation method is provided for wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and mainly relates to a method for preparing a core-shell type magnetic composite resin microsphere adsorbent with lignin-modified phenolic resin under acidic conditions. Background technique [0002] Lignin water is a precious resource for human survival and development. Today, the severity and importance of water problems have increasingly become the consensus of all walks of life. A variety of industries represented by the textile industry discharge organic wastewater with deep color dyes, and wastewater containing heavy metals produced in industrial production processes such as mine development, electroplating, chemical fertilizers, tanning, batteries, papermaking, and pesticides, if they are discharged without treatment To the external environment, it will cause different degrees of water pollution, and finally endanger the health of human beings and other organisms. As the mos...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/24B01J20/30B01J13/02C08G8/28C02F1/28C02F1/48C02F101/20
CPCB01J13/02B01J20/24B01J20/28009B01J20/28019B01J2220/4837C02F1/286C02F1/488C02F2101/20C08G8/28
Inventor 王冠华司传领常敏敏刘青君张佳音陈雪娇
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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