Lithium-ion imprinted polymer and preparation method thereof

A technology of imprinting polymers and lithium ions, applied in chemical instruments and methods, other chemical processes, chemical recycling, etc., can solve the problems of orange peel not being comprehensively utilized, environmental pollution, waste, etc., and achieve regeneration and reuse, pro- Strong water-based, high selective adsorption effect

Active Publication Date: 2015-11-18
QUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] my country is one of the important origins of citrus, citrus is rich in resources, and the newly peeled orange peel accounts for about 15% of the total quality of oranges. Therefore, ten

Method used

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  • Lithium-ion imprinted polymer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] (1) Orange peel cellulose pretreatment

[0022] Take 10g of orange peel powder and 200g of 80% ethanol solution in a round bottom flask, reflux extraction for 4h, centrifuge to obtain solid and mother liquor, mother liquor is used to extract flavonoids and other components, ethanol recycling, solid Wash and drop with pure water until the cellulose no longer releases yellow organic matter; add the obtained solid into 100ml of sodium hydroxide solution with a concentration of 0.4g / L, stir for 1h, and centrifuge to obtain alkalized orange peel cellulose; The alkalized orange peel cellulose was added into 100 g of a mass percentage concentration of 20% isopropanol solution, soaked for 3 hours, and centrifuged to obtain alkalized alcoholized orange peel cellulose;

[0023] (2) Polyacrylamide graft modification

[0024] Pour the alkalized alcoholized orange peel cellulose obtained in step (1) into a three-necked flask equipped with a mechanical stirrer and a condenser, add 9...

Embodiment 2

[0032] (1) Orange peel cellulose pretreatment

[0033] Get 10g orange peel powder and 200g mass percentage concentration and be 85% ethanol solution in the round-bottom flask, reflux extraction 3.5h, centrifugation obtains solid and mother liquor, mother liquor is used for extracting components such as flavonoids, ethanol recycling, The solid was washed and dropped with pure water until the cellulose no longer released yellow organic matter; the obtained solid was added to 100ml of sodium hydroxide solution with a concentration of 0.4g / L, stirred for 3h, and centrifuged to obtain alkalized orange peel cellulose; The obtained alkalized orange peel cellulose was added to 100 g of isopropanol solution with a mass percent concentration of 15%, soaked for 12 hours, and centrifuged to obtain alkalized alcoholized orange peel cellulose;

[0034] (2) Polyacrylamide graft modification

[0035] Pour the alkalized alcoholized orange peel cellulose obtained in step (1) into a three-necke...

Embodiment 3

[0041] (1) Orange peel cellulose pretreatment

[0042] Take 10g of orange peel powder and 200g of 90% ethanol solution in a round-bottomed flask, reflux extraction for 3h, centrifuge to obtain solid and mother liquor, mother liquor is used to extract flavonoids and other components, ethanol recycling, solid Wash and drop with pure water until the cellulose no longer releases yellow organic matter; add the obtained solid into 100ml of sodium hydroxide solution with a concentration of 0.5g / L, stir for 2 hours, and centrifuge to obtain alkalized orange peel cellulose; The alkalized orange peel cellulose was added into 100 g of a mass percent concentration of 15% isopropanol solution, soaked for 8 hours, and centrifuged to obtain alkalized alcoholized orange peel cellulose;

[0043] (2) Modification of thiosemicarbazide

[0044] The alkalized alcoholized orange peel cellulose obtained in step (1) is added to 10 g of formaldehyde solution with a concentration of 36% by mass, and d...

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Abstract

The invention relates to a lithium-ion imprinted polymer and a preparation method thereof, and particularly provides a method for preparing an imprinted polymer which has high selective adsorption performance on lithium ions and prepared by performing grafting modification on orange peel cellulose serving as a substrate. The preparation method comprises the following steps: performing pre-treatment on the orange peel cellulose to obtain alkalified and alcoholized orange peel cellulose; performing alkylation and grafting reaction to obtain modified orange peel cellulose with a high-activity adsorption site; then, adding the modified orange peel cellulose into the aqueous solution of lithium ions; after adsorption equilibrium, adding a cross-linking agent for cross-linking and enclosing the adsorption site and the lithium ions to form a semi-closed space; finally, eluting the lithium ions by using a reclaiming agent to obtain the lithium-ion imprinted polymer with the high selective adsorption performance. The lithium-ion imprinted polymer has the advantages of low cost, stable performance, high selective adsorption performance on the lithium ions and the like, and is expected to be widely applied to the field of salt lake chemical industry, new energy and environmental protection to realize high-efficiency enrichment and extraction of the lithium ions.

Description

technical field [0001] The invention relates to a lithium ion imprinted polymer and a preparation method thereof, in particular to a method for preparing an imprinted polymer with high selective adsorption performance for lithium ions by grafting and modifying orange peel cellulose. Background technique [0002] As one of the most important green energy materials, lithium and its compounds are widely used in the field of lithium batteries. With the increasing depletion of lithium ore, many countries turn their attention to lithium-ion-containing seawater and salt lake brine to extract lithium ions. In particular, salt lake brine lithium resources are regarded as an important strategic reserve resource. Salt lake brine lithium extraction technology has gradually become The main direction of lithium salt production and research. [0003] However, due to the coexistence of lithium and a large number of alkali metal alkaline earth metal ions in salt lake brine, the chemical pro...

Claims

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Application Information

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IPC IPC(8): C08B15/06C08B15/10B01J20/24B01J20/30
CPCY02P20/584
Inventor 吕亮曾惠明王玉林
Owner QUZHOU UNIV
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