Lignin graft copolymerization compound adsorption resin and preparation method thereof

A composite adsorption and lignin technology, which is applied in the field of lignin graft copolymerization composite adsorption resin and its preparation, achieves the effects of good adsorption performance, convenient operation and improved adsorption capacity

Inactive Publication Date: 2013-09-18
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing graft copolymerization modification of lignin and chitosan is mainly that lignin and chitosan are respectively grafted with vinyl monomers, and the graft copolymerization products are used to treat single metal ion solutions. lignin and chitosan blend grafted vinyl monomers to prepare lignin / chitosan interpenetrating network graft copolymerization adsorption resin, which will be applied to the research report of selective adsorption in the mixed solution of multiple metal ions, and for Studies on the further treatment of graft copolymerization products to improve their adsorption properties are also rare.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 1.625g sodium lignosulfonate and 0.82g chitosan and dissolve in 30ml dilute hydrochloric acid solution. Another 19.95g of acrylamide was dissolved in distilled water, and 13.3g of maleic anhydride, 1g of bentonite, and 0.0665g of N, N'-methylenebisacrylamide were successively added to the acrylamide solution, stirred and mixed evenly (referred to as liquid A ). Then add liquid A into the sodium lignosulfonate / chitosan blend solution, adjust the pH to 4.0, then add 0.266g potassium persulfate, seal, heat up, and react for 2 hours at 65°C, 75°C, and 85°C respectively , matured at 90°C for 0.5h, cooled, cut into pieces, soaked and washed with methanol, dried in a vacuum oven at 70-80°C, crushed, and sieved to obtain 60-100 mesh bentonite / chitosan / sodium lignosulfonate-g- Acrylamide-maleic anhydride composite adsorption resin BLAMA (hereinafter referred to as composite adsorption resin BLCAMA). At room temperature, BLCAMA in 100mL, 2mmol / L binary Pb 2+ / Cu 2+ Pb i...

Embodiment 2

[0036] Operation method is the same as embodiment 1. The formulation conditions are m (sodium lignosulfonate): m (total monomer) = 2.0: 10, m (sodium lignosulfonate): m (chitosan) = 1: 1, m (acrylamide): m (maleic anhydride)=5:2, m(potassium persulfate)=0.8%, m(N, N'-methylenebisacrylamide)=0.20%, m(kaolin)=1%, pH=4 , the resulting composite adsorption resin KLCAMA in the binary Pb 2+ / Cu 2+ Pb in solution 2+ The adsorption capacity is 0.987mmol / g, Pb 2+ to Cu 2+ The selectivity coefficient α is 5.67.

Embodiment 3

[0038] Operation method is the same as embodiment 1. The formulation conditions are m (sodium lignosulfonate): m (total monomer) = 1.0: 10, m (sodium lignosulfonate): m (chitosan) = 2: 1, m (acrylamide): m (maleic anhydride)=6:2, m(potassium persulfate)=1.0﹪, m(N, N'-methylenebisacrylamide)=0.24%, m(diatomaceous earth)=5%, pH= 3, the resulting composite adsorption resin GLCAMA in the binary Pb 2+ / Cu 2+ Pb in solution 2+ The adsorption capacity is 0.843mmol / g, Pb 2+ to Cu 2+ The selectivity coefficient α is 4.91.

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Abstract

The invention belongs to the technical field of adsorption resin and particularly relates to lignin graft copolymerization compound adsorption resin and a preparation method thereof. The compound adsorption resin is formed by acrylic amide, maleic anhydride, sodium lignin sulfonate, chitosan, potassium peroxodisulfate and N,N'-methylene bisacrylamide. According to the method, a graft copolymerization short chain is introduced on a lignin molecular chain so that the structure of lignin is more regular and the molecular weight of the lignin is more greatly improved. The compound adsorption resin has a certain water adsorption performance and mainly aims at a multi-element mixed metal ion solution system to improve the adsorption amount of metal ions and the competitive adsorption selection of the metal ions.

Description

technical field [0001] The invention belongs to the technical field of adsorption resins, in particular to a lignin graft copolymerization composite adsorption resin with high adsorption capacity and high competitive adsorption selectivity and a preparation method thereof. Background technique [0002] At present, it is relatively common to use acrylic monomers to modify lignin as an adsorption resin, and the modification is mainly realized by low-molecular derivatization and graft copolymerization of vinyl monomers. The existing graft copolymerization modification of lignin and chitosan is mainly to graft lignin and chitosan with vinyl monomers respectively, and use the graft copolymerization products to treat single metal ion solution. lignin and chitosan blend grafted vinyl monomers to prepare lignin / chitosan interpenetrating network graft copolymerization adsorption resin, which will be applied to the research report of selective adsorption in the mixed solution of multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 谢建军姚庆鑫刘军霞曾念丁出吴义强
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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