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Preparation method of macroporous slightly-alkaline acrylonitrile anion exchange resin

An exchange resin and acrylonitrile technology, which is applied in the field of preparation of macroporous weakly basic acrylonitrile anion exchange resin, can solve the problems of insufficient exchange capacity, uneven pore size distribution, and low exchange speed, and achieve optimized process parameters and exchange capacity Improved effect

Active Publication Date: 2015-07-08
ANHUI WANDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the exchange capacity of the current anion and cation exchange resins has been effectively improved, the pore size distribution is uneven, the proportion of small pores is too large, and the exchange rate is low.
Insufficient switching capacity and other issues cannot meet customer requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The preparation method of macroporous weakly basic acrylonitrile anion exchange resin comprises the following steps:

[0048] (1) Polymerization reaction to prepare ball A

[0049] Prepare the water phase with the following weight (kg), mix and stir evenly;

[0050] Deionized water 520

[0051] Gelatin 15

[0052] Ethanol 10

[0053] Polyvinyl alcohol 50

[0054] Tetraethylenepentamine 15

[0055] Sodium chloride 40

[0056] Sodium persulfate 1

[0057] Use sulfuric acid to adjust the pH of the water phase to neutral

[0058] Weigh the raw materials with the following weight (kg), mix them and add them to the water phase, stir, and adjust the speed according to the particle size;

[0059] Acrylonitrile 340

[0060] Divinylbenzene 42

[0061] TAIC 7

[0062] 200# solvent oil 30

[0063] Toluene 85

[0064] Ethyl acrylate 15

[0065] Azobisisobutyronitrile 3

[0066] Slowly raise the temperature to 62-65°C, pay attention to observe the particle size a...

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Abstract

The invention discloses a preparation method of macroporous slightly-alkaline acrylonitrile anion exchange resin. Based on the traditional production technology, by reasonably matching a suspension protection agent, a dispersing agent, a pore forming agent and a complexing agent and optimizing the technological parameters, the anion exchange resin prepared by the method realizes uniform pore size distribution and increases the exchange capacity; and the specific surface area of the prepared ion exchange resin can reach above 60m<2> / g, the pores larger than 2nm account for over 50%, and the total exchange capacity reaches 9.5mmol / g.

Description

technical field [0001] The invention belongs to a preparation method of an ion exchange resin, in particular to a preparation method of a macroporous weakly basic acrylonitrile anion exchange resin. Background technique [0002] Anion and cation exchange resins are widely used in water treatment, material purification, concentration, separation, transformation of material ion composition, material decolorization and catalysts. Although the exchange capacity of current anion and cation exchange resins has been effectively improved, the pore size distribution is uneven, the proportion of small pores is too large, and the exchange rate is low. Insufficient switching capacity and other issues cannot meet customer requirements. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of macroporous weakly basic acrylonitrile anion exchange resin. The present invention improves the dispersibility and suspension by improving the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J41/14B01J41/10B01J41/08B01J41/13
Inventor 姚能平梅德华陈建国林伟王海宽王玉兰
Owner ANHUI WANDONG CHEM