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Nitrogen-containing heterocyclic ring amphoteric resin and application thereof in adsorption and separation of small-molecular organic acids

A technology of small molecule organic acid and amphoteric resin, applied in ion exchange, selective adsorption, ion exchange regeneration, etc., can solve the problems of low adsorption capacity, poor selectivity and single structure of small molecule organic acid, and achieve the solution of limited adsorption capacity, Excellent adsorption performance and high selectivity

Active Publication Date: 2021-10-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small molecular organic acids generally contain carboxyl groups, and some have hydroxyl groups. Commonly used ion exchange resins have a relatively single structure, and have low adsorption capacity and poor selectivity for small molecular organic acids.

Method used

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  • Nitrogen-containing heterocyclic ring amphoteric resin and application thereof in adsorption and separation of small-molecular organic acids
  • Nitrogen-containing heterocyclic ring amphoteric resin and application thereof in adsorption and separation of small-molecular organic acids
  • Nitrogen-containing heterocyclic ring amphoteric resin and application thereof in adsorption and separation of small-molecular organic acids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of nitrogen-containing heterocyclic amphoteric resin, its preparation method comprises the steps:

[0047] (1) Preparation of nitrogen-containing heterocyclic diester resin:

[0048] First prepare the oil phase mixture and the water phase solution. The oil phase mixture is mixed by monomer, crosslinking agent, porogen and initiator in a mass ratio of 1:0.1:0.5:0.01, and the monomer is composed of 2-vinylpyridine, methyl acrylate and vinyl acetate in mass ratio The crosslinking agent is divinylbenzene, the porogen is toluene and n-heptane mixed at a mass ratio of 1:1, and the initiator is azobisisobutyronitrile. The aqueous phase solution is composed of gelatin solution and NaCl solution, respectively preparing a gelatin solution with a mass concentration of 1% and a NaCl solution with a mass concentration of 3%, and mixing the prepared gelatin solution and NaCl solution at a mass ratio of 1:1 to obtain aqueous solution. Mix the prepared oil phase mixture with ...

Embodiment 2

[0057] A kind of nitrogen-containing heterocyclic amphoteric resin, its preparation method comprises the steps:

[0058] (1) Preparation of nitrogen-containing heterocyclic diester resin:

[0059] First prepare the oil phase mixture and the water phase solution. The oil phase mixture is composed of monomers, crosslinking agents, porogens and initiators in a mass ratio of 3:0.4:2:0.05, and the monomers are composed of 4-vinylpyridine, methyl crotonate and propylene acetate Esters are mixed in a mass ratio of 3:3:1, the crosslinking agent is divinylbenzene, the porogen is mixed with toluene and n-heptane in a mass ratio of 5:1, and the initiator is azobisisobutyl Nitrile. The aqueous phase solution is composed of gelatin solution and NaCl solution, respectively preparing a gelatin solution with a mass concentration of 3% and a NaCl solution with a mass concentration of 5%, and mixing the prepared gelatin solution and NaCl solution at a mass ratio of 5:1 to obtain aqueous solu...

Embodiment 3

[0067] A kind of nitrogen-containing heterocyclic amphoteric resin, its preparation method comprises the steps:

[0068] (1) Preparation of nitrogen-containing heterocyclic diester resin:

[0069] First prepare the oil phase mixture and the water phase solution. The oil phase mixture is composed of monomers, crosslinking agents, porogens and initiators in a mass ratio of 2:0.3:1.2:0.03, and the monomers are composed of 1-vinylimidazole, methyl acrylate and butenyl acetate Mixed at a mass ratio of 2.5:2.5:1, the crosslinking agent is divinylbenzene, the porogen is mixed with toluene and n-heptane at a mass ratio of 3:1, and the initiator is benzoyl peroxide. The aqueous phase solution is composed of gelatin solution and NaCl solution, respectively preparing a gelatin solution with a mass concentration of 2% and a NaCl solution with a mass concentration of 4%, and mixing the prepared gelatin solution and NaCl solution at a mass ratio of 3:1 to obtain aqueous solution. After m...

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Abstract

The invention discloses a nitrogen-containing heterocyclic ring amphoteric resin and an application thereof in adsorption and separation of small-molecular organic acids. The nitrogen-containing heterocyclic amphoteric resin is prepared by the following steps: carrying out suspension polymerization on three or more monovinyl-containing monomers to obtain nitrogen-containing heterocyclic diester resin, and carrying out alkaline hydrolysis to obtain the nitrogen-containing heterocyclic amphoteric resin. The nitrogen heterocyclic ring amphoteric resin prepared by the invention has large adsorption capacity and high selectivity on small molecular organic acid, and can be used as a novel adsorption medium for separating small molecular organic acid from fermentation liquor.

Description

technical field [0001] The invention relates to the technical field of resin preparation, in particular to a nitrogen-containing heterocyclic amphoteric resin and its application for adsorption and separation of small molecule organic acids. Background technique [0002] Organic acids refer to organic compounds containing one or more carboxyl groups. Organic acids with a molecular weight of less than 500 are called small molecule organic acids, such as glycolic acid, citric acid, L-malic acid, succinic acid, etc. Small molecule organic acids are not only used as important raw materials in organic synthesis, but also in the fields of medicine, food, and remediation of heavy metal pollution in soil. In the pharmaceutical industry, glycolic acid and lactic acid can be used as fungicides in wards, operating rooms and laboratories. In the food industry, L-malic acid, citric acid and lactic acid can be used as an acid and taste enhancer. In the industry of remediation of heavy m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J9/36C08F226/06C08F220/14C08F218/08C08F218/12C08F212/36C08L39/04B01J20/26B01J20/30B01D15/08
CPCC08J9/28C08J9/36C08F226/06C08F220/14B01J20/261B01D15/08C08J2339/04B01J2220/4812C08F218/08C08F218/12C08F212/36
Inventor 张军伟孙震袁苗新
Owner JIANGNAN UNIV