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Preparation method of pyridine chelating resin

A technology of chelating resin and pyridine, which is applied in the field of resin, can solve the problems of poor hydrophilic performance and achieve the effect of fast chelating speed and easy popularization and application

Inactive Publication Date: 2018-03-16
王炳干
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that they all have one thing in common, that is, they basically use divinylbenzene as a crosslinking agent, which has the disadvantage of poor hydrophilicity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of preparation method of pyridine chelating resin comprises the following processing steps:

[0016] A. Put the pre-treated macroporous chlorine ball into a four-neck round-bottomed flask with an electric stirrer, a condenser, a feeding port and a nitrogen port, then add xylene, and swell for 2 hours;

[0017] B. Then pass nitrogen, add 2-mercaptoethanol, 2-aminopyridine, dimethylformamide, sodium hydroxide and tetrabutylammonium bromide after 0.5h, continue to pass nitrogen under stirring, and maintain ventilation for 20 minutes;

[0018] C. Raise the reaction temperature to 25°C and react for 26 hours; after the reaction, wash with methanol, water and acetone respectively, transfer the pellets to a Soxhlet extractor, extract with 95% ethanol for 5 hours, and dry under vacuum at 50°C 48h, the product pyridine chelate resin was obtained.

[0019] The macroporous chlorine balls are macroporous chloromethylated divinylbenzene crosslinked polystyrene beads with a c...

Embodiment 2

[0021] A kind of preparation method of pyridine chelating resin comprises the following processing steps:

[0022] A. Put the pre-treated macroporous chlorine ball into a four-neck round-bottomed flask with an electric stirrer, a condenser, a feeding port and a nitrogen port, then add xylene, and swell for 3 hours;

[0023] B. Then pass nitrogen, add 2-mercaptoethanol, 2-aminopyridine, dimethylformamide, sodium hydroxide and tetrabutylammonium bromide after 1 hour, continue to pass nitrogen under stirring, and maintain ventilation for 30 minutes;

[0024] C. Raise the reaction temperature to 30°C and react for 28 hours; after the reaction, wash with methanol, water and acetone respectively, transfer the pellets to a Soxhlet extractor, extract with 95% ethanol for 6 hours, and vacuum dry at 60°C 50h, the product pyridine chelate resin was obtained.

[0025] The macroporous chlorine balls are macroporous chloromethylated divinylbenzene crosslinked polystyrene beads with a cross...

Embodiment 3

[0027] A kind of preparation method of pyridine chelating resin comprises the following processing steps:

[0028] A. Put the pre-treated macroporous chlorine ball into a four-necked round-bottomed flask with an electric stirrer, a condenser, a feeding port and a nitrogen port, then add xylene, and swell for 2.5 hours;

[0029] B. Then pass nitrogen, add 2-mercaptoethanol, 2-aminopyridine, dimethylformamide, sodium hydroxide and tetrabutylammonium bromide after 0.75h, continue to pass nitrogen under stirring, and maintain ventilation for 25min;

[0030] C. Raise the reaction temperature to 27.5°C and react for 27 hours; after the reaction, wash with methanol, water and acetone respectively, transfer the pellets to a Soxhlet extractor, extract with 95% ethanol for 5.5 hours, and vacuum at 55°C After drying for 49 hours, the product pyridine chelate resin was obtained.

[0031] The macroporous chlorine balls are macroporous chloromethylated divinylbenzene cross-linked polystyre...

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PUM

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Abstract

The invention relates to a preparation method of pyridine chelate resin, belonging to the technical field of resins. The present invention uses macroporous chloromethylated polystyrene beads (chlorine balls) as matrix resin, and prepares a kind of chela with sulfide molecular chain as cantilever and aminopyridine as functional group according to the principle of macromolecular chemical reaction. synthetic resin. It has good selective chelating properties for Hg2+, Pd2+, Au3+, Cu2+, Pd2+ and other metal ions, and has the advantages of fast chelating rate, large chelating amount, easy desorption, regeneration and repeated use. Filling the chelating resin prepared by the invention into the chromatographic column can realize the automatic control of the operation, and is a practical technology that is easy to popularize and apply.

Description

technical field [0001] The present invention relates to a kind of preparation method of resin, more specifically, the present invention relates to a kind of preparation method of pyridine chelate resin, belong to resin technical field. Background technique [0002] Chelating resin is a polymer solid chelating agent. It uses a cross-linked polymer as a skeleton and is connected with a special chelating functional group. It can selectively chelate specific metal ions from an aqueous solution containing metal ions. Through ionic bonds and Covalent bonds form cyclic complexes. Then, a class of functional polymers that can release the chelated metal ions under appropriate elution conditions. [0003] The matrix of the chelating resin can be cross-linked polystyrene, cross-linked polyacrylonitrile or cross-linked polyacrylic acid, etc., all of which are prepared by conventional polymer suspension polymerization. It has the characteristics of mature preparation process, easy func...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/34C08F8/32C08F8/24C08F212/08B01D15/10
CPCC08F8/34B01D15/10C08F8/32C08F8/24C08F212/08
Inventor 王炳乾
Owner 王炳干
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