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Biodegradable polyaspartic acid based chelate resin and preparation method thereof

An aspartic acid-based, chelating resin technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of complex and cumbersome preparation processes, low swelling of copolymers, and cumbersome preparation methods, and achieve good application prospects , fast swelling rate and simple steps

Inactive Publication Date: 2016-10-26
水友环保技术(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The copolymer has a strong adsorption effect and high adsorption capacity on divalent heavy metal ions, but the preparation method is relatively cumbersome, and the swelling of the copolymer is small, so it is only suitable for materials that require a small volume change (swelling ratio is small) occasions, making it limited in some applications
[0005] In summary, there are few reports on chelating resins based on polyaspartic acid as raw materials, and there are disadvantages such as poor swelling and complicated preparation processes.

Method used

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  • Biodegradable polyaspartic acid based chelate resin and preparation method thereof
  • Biodegradable polyaspartic acid based chelate resin and preparation method thereof
  • Biodegradable polyaspartic acid based chelate resin and preparation method thereof

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preparation example Construction

[0040] The application of the chelating resin prepared according to all the above-mentioned preparation methods in the preparation of packed columns is also within the protection scope of the present invention.

[0041] The present invention can be better understood from the following examples. However, those skilled in the art can easily understand that the content described in the embodiments is only for illustrating the present invention, and should not and will not limit the present invention described in the claims.

Embodiment 1

[0050]Add 5.0g of polysuccinimide, add 30ml of water, stir well, slowly add 2mol / L NaOH dropwise to adjust the initial pH of the solution = 11.0, until the reaction body turns into a yellow clear liquid (about 1h), adjust the system with 1% HCL pH=4.5. Then, 0.586 ml of ethylene glycol diglycidyl ether was added dropwise into the mixture, stirred evenly, and reacted at a constant temperature of 50°C. As the reaction progressed, the pH gradually increased, and the pH of the reaction system was adjusted to 4.5 every 1 hour, and the reaction ended in 4 hours. Put the product into a vacuum drying oven at 30° C. for 5 hours to obtain a transparent, brown-red chelating resin. The swelling rate of gained chelate resin is 136g / g. Its structure was identified as figure 2 , polyaspartic acid-ethylene glycol diglycidyl ether cross-linked polymer chelate resin NMR spectrum, it can be seen that the chemical combination of polyaspartic acid and ethylene glycol diglycidyl ether forms a c...

Embodiment 2

[0052] Add 6.0g of polysuccinimide, add 30ml of water, stir evenly, slowly add 2mol / L NaOH dropwise to adjust the initial pH of the solution = 11.0, until the reaction body turns into a yellow clear liquid (about 1h), adjust the system with 1% HCL pH=4.0. Then, 1.406 ml of ethylene glycol diglycidyl ether was added dropwise into the mixture, stirred evenly, and reacted at a constant temperature of 60°C. As the reaction progressed, the pH gradually increased, and the pH of the reaction system was adjusted to 4.0 every 1 hour, and the reaction ended in 4 hours. Put the product into a vacuum drying oven at 30° C. for 5 hours to obtain a transparent, brown-red chelating resin. The swelling rate of gained chelate resin is 165g / g.

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Abstract

The invention discloses biodegradable polyaspartic acid based chelate resin and a preparation method thereof. The preparation method includes: firstly, dropwise adding ethylene glycol glycidyl ether solution into hydrolyzed polysuccinimide aqueous solution, and well mixing; secondly, allowing reaction of a reaction system at 40-70 DEG C for 1-4h to obtain transparent chelate resin. By adoption of polyaspartic acid and ethylene glycol diglycidyl ether as raw materials which are excellent in degradability and biocompatibility, environment pollution is avoided; the preparation method is mild in reaction condition and simple in procedure, and the chelate resin can be produced by reaction without chemical modification of the raw materials; the obtained chelate resin is high in water absorptivity and swelling rate and can be widely applied to field of heavy metal containing wastewater treatment, traditional Chinese medicine extraction and the like.

Description

technical field [0001] The present invention relates to a kind of biodegradable chelating resin, relate in particular to a kind of chelating resin which obtains biodegradable polyaspartic acid and ethylene glycol diglycidyl ether crosslinked polymer through the method of chemical crosslinking and its preparation method. Background technique [0002] Polyaspartic acid is a water-soluble amino acid polymer. In addition to the properties of water-soluble carboxylic acid, it also has good biodegradability and biocompatibility. Therefore, the polyaspartic acid resin made from polyaspartic acid is widely used due to its advantages of large water absorption and high water retention capacity. [0003] As an environmentally friendly material, polyaspartic acid contains high-density carboxyl groups in its structure and has great potential to adsorb heavy metal ions such as Pb2+, Hg2+, and Cd2+; and from the structural analysis, its theoretical adsorption capacity for heavy metal ions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10B01J20/26B01J20/30
CPCC08G73/1092B01J20/262B01J2220/4812
Inventor 迟波
Owner 水友环保技术(苏州)有限公司