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A kind of cross-linked sulfonated aldehyde and ketone cation exchange resin and its preparation method and application

A technology of ion exchange resin and sulfonated aldehyde and ketone cation, applied in cation exchange, organic cation exchanger, ion exchange, etc., can solve the problem that the actual exchange equivalent of bio-based cation exchange resin is not ideal, the sulfuric acid sulfonation reaction is dangerous, and The actual exchange equivalent of resin is low, and the effect of broadening the research scope, simple and controllable synthesis process, and high actual exchange equivalent is achieved.

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the application of sulfonated cross-linked polystyrene type cation exchange resin is common, such as #732 type cation exchange resin, the risk of oleum sulfonation reaction is large; and it is first polymerized and then sulfonated, and the sulfonation efficiency is low. The actual exchange equivalent of the resin is much lower than the theoretical exchange equivalent
The actual exchange equivalents of composite polystyrene-based cation exchange resins and bio-based cation exchange resins are not ideal

Method used

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  • A kind of cross-linked sulfonated aldehyde and ketone cation exchange resin and its preparation method and application
  • A kind of cross-linked sulfonated aldehyde and ketone cation exchange resin and its preparation method and application
  • A kind of cross-linked sulfonated aldehyde and ketone cation exchange resin and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve 10 parts of sodium sulfite and 9 parts of acetone in 45 parts of water, then raise the temperature to 55°C and react for 10 minutes, then add 10.6 parts of formaldehyde dropwise within 0.5 hours; 1.5 parts of phenol, reacted at 90°C for 10 minutes to obtain a liquid active polycondensate; put the liquid product in a closed container, and reacted at 95°C for 12 hours to obtain a cross-linked solid resin. The product can be crushed to obtain cations of 2 mm Exchange resin pellets.

[0039] The sulfonic acid group content of the exchange resin product obtained in this embodiment is 2.619 mmol / g.

Embodiment 2

[0041] Dissolve 10 parts of potassium sulfite and 7.5 parts of acetone in 40 parts of water, then raise the temperature to 50°C and react for 15 minutes, then add 9 parts of formaldehyde dropwise within 0.5 hours; Then add 1 part of phenol, and keep it warm at 95°C for 15 minutes to obtain a liquid active polycondensation product; put the liquid product in a closed container and keep it warm at 95°C for 24 hours to get a cross-linked solid resin, which can be broken into 3mm cation exchange resin particles.

[0042] The sulfonic acid group content of the exchange resin product obtained in this embodiment is 2.988 mmol / g.

Embodiment 3

[0044]Dissolve 10 parts of sodium bisulfite and 7.5 parts of acetone in 42 parts of water, then raise the temperature to 57°C for 20 minutes, then add 9.6 parts of formaldehyde dropwise within 0.5 hours; after the dropwise addition, raise the temperature to 80°C for 1 hour , and then add 1.2 parts of phenol, and react at 95°C for 10 minutes to obtain a liquid active polycondensate; put the liquid product in a closed container and react at 95°C for 24 hours to obtain a cross-linked solid resin, which can be obtained after crushing 1mm cation exchange resin particles.

[0045] The sulfonic acid group content of the exchange resin product obtained in this embodiment is 3.030 mmol / g.

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Abstract

The invention belongs to the technical field of cation exchange resin, and discloses cross-linked sulfonated aldehyde ketone cation exchange resin, a preparation method thereof and an application of the resin. The method includes the steps: performing aldol reaction on sulfite, ketone and aldehyde to obtain an oligomer, and adding phenol and performing heat insulation condensation reaction to prepare active polycondensation; performing heat insulation curing crosslinking reaction to obtain the cross-linked sulfonated aldehyde ketone cation exchange resin. The invention further provides cross-linked sulfonated aldehyde ketone cation exchange resin prepared by the method and application of the cross-linked sulfonated aldehyde ketone cation exchange resin to removal of hard-water calcium magnesium ions. According to the method, a sulfonating process is implemented, then a crosslinking process is implemented, the method overturns a traditional production process that a crosslinking processis implemented, then a sulfonating process is implemented, sulfonation reaction is mild, processes are simple, convenient and controllable, ketone units in the acquired exchange resin are sufficiently sulfonated, actual exchange equivalent of the resin is higher than that of 732-type polystyrene cation exchange resin, and the resin can be directly used for exchange of calcium magnesium ions in hard water and widely applied to the fields of water treatment, food, metallurgy and the like and has high application values.

Description

technical field [0001] The invention belongs to the technical field of cation exchange resins, in particular to a cross-linked sulfonated aldehyde and ketone cation exchange resin and its preparation method and application. Background technique [0002] Ion exchange resin, as a cross-linked polymer loaded with active groups, has the functions of exchange, absorption and catalysis, and is mainly used in the fields of water treatment, food, electric power, medicine and health, and metallurgy. In my country, strong-acid cation exchange resins are widely used, accounting for 80% of the total output of ion exchange resins. Most of the current commercial cation exchange resins use styrene and acrylic acid (ester) as raw materials, cross-linking and polymerizing with the cross-linking agent divinylbenzene to prepare body-shaped polymers with a network skeleton structure, and then sulfonated with oleum Preparation of sulfonated polystyrene cation exchange resin. Sulfonated polysty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28B01J39/05B01J39/19
Inventor 周明松丁收香魏娇彭瑞芬汪东平邱学青
Owner SOUTH CHINA UNIV OF TECH
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