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Weak-base anion-exchange resin and method for purifying levulinic acid with same

A weakly basic anion and exchange resin technology, applied in anion exchange, ion exchange, chemical instruments and methods, etc., can solve the problems of high heat consumption, waste of fuel, high energy consumption, etc., shorten the initial concentration time and reduce the cost of purification , the effect of reducing energy costs

Inactive Publication Date: 2017-09-19
ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method has obvious defects of high energy consumption, the main reason is: after the furfural is separated from the stock solution by hydrolysis, the content of levulinic acid in the dilute aqueous solution containing levulinic acid is below 2wt%, and the concentration is relatively low. During the rough purification technology of distillation, more than 80% of the water needs to be removed, which consumes a lot of heat and needs to waste a lot of fuel to generate heat sources, which leads to high production costs of levulinic acid, and the entire traditional purification process The production cycle is long, which limits the improvement of levulinic acid production efficiency

Method used

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  • Weak-base anion-exchange resin and method for purifying levulinic acid with same
  • Weak-base anion-exchange resin and method for purifying levulinic acid with same
  • Weak-base anion-exchange resin and method for purifying levulinic acid with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The weakly basic anion exchange resin provided by this embodiment, in terms of mass percentage, its preparation raw materials are:

[0056] Resin matrix 66wt%; specifically: 20wt% acrylic acid, 24 wt% methyl acrylate, 22 wt% methyl methacrylate;

[0057] The first porous carrier 5wt%; specifically: 1.5wt% single-layer graphene, 3.5wt% multi-layer graphene;

[0058] 7wt% of the second porous carrier; specifically: armchair nanotubes;

[0059] Initiator 7wt%; specifically: 2wt% benzoyl peroxide, 5wt% azobisisobutyronitrile;

[0060] Organic solvent 6 wt%; specifically: 2wt% ethyl acetate, 1wt% tetrahydrofuran, 0.5wt% chloroform, 2.5wt% 1,4-dioxane;

[0061] Polymerization aid 9wt%; The polymerization aid is nano-SiO 2 .

[0062] Its preparation process is specifically:

[0063] (1) Disperse the dried resin matrix in an organic solvent, swell at 40°C for 24 hours, and swell under stirring conditions during swelling, and the stirring speed is designed to be: 150r / min; ...

Embodiment 2

[0073] The weakly basic anion exchange resin provided in this embodiment, in terms of mass percentage, its preparation raw materials are:

[0074] Resin matrix 80wt%; specifically: 25wt% styrene, 30wt% butyl methacrylate, 25wt% methyl methacrylate;

[0075] The first porous carrier 5wt%; specifically: 1wt% multilayer graphene, 4wt% graphene oxide;

[0076] The second porous carrier 6.5wt%; specifically: 3wt% zigzag nanotubes, 3.5wt% chiral nanotubes;

[0077] Initiator 3.5wt%; specifically: 1wt% azobisisobutyronitrile, 1wt% p-menthane hydroperoxide, 1.5wt% diisopropyl peroxydicarbonate;

[0078] Organic solvent 3 wt%; specifically: 1wt% 1,4-dioxane, 0.5wt% tetrahydrofuran, 0.5wt% chloroform, 1wt% N,N-dimethylamide;

[0079] Polymerization aid 2wt%; The polymerization aid is nano-SiO 2 .

[0080] The preparation process is the same as in Example 1, only adjusting some parameters as follows;

[0081] In step (1), swell at 50°C for 48 hours, and the stirring speed during swe...

Embodiment 3

[0090] The weakly basic anion exchange resin provided in this embodiment, in terms of mass percentage, its preparation raw materials are:

[0091] Resin matrix 70wt%; specifically: 25wt% acrylic acid, 15wt% methyl methacrylate, 30wt% styrene;

[0092] The first porous carrier 3wt%; specifically: 1wt% multilayer graphene, 2wt% graphene oxide;

[0093] 3 wt% of the second porous carrier; specifically: 0.5wt% armchair nanotubes, 1wt% zigzag nanotubes, 1.5wt% chiral nanotubes;

[0094] Initiator 5wt%; specifically: 2wt% benzoyl peroxide, 1wt% azobisisobutyronitrile, 2wt% p-menthane hydroperoxide;

[0095] Organic solvent 10wt%; specifically: 2wt% ethyl acetate, 1wt% chloroform, 3.5wt% 1,4-dioxane, 3.5wt% N,N-dimethylamide;

[0096] Polymerization aid 9wt%; The polymerization aid is nano-SiO 2 .

[0097] The preparation process is the same as in Example 1, only adjusting some parameters as follows;

[0098] In step (1), swell at 40°C for 40 hours, and the stirring speed during...

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Abstract

The invention belongs to the technical field of preparation of levulinic acid, and particularly relates to weak-base anion-exchange resin and a method for purifying levulinic acid with the same. The resin is used for separating and purifying levulinic acid in a hydrolysis stock solution, and the hydrolysis stock solution is applied to a technology for co-production preparation of furfural and levulinic acid from biomass materials; preparation raw materials comprise a resin matrix, graphene as a first porous support, a carbon nano tube as a second porous support, an initiating agent, an organic solvent and a polymerization promoter. When the weak-base anion-exchange resin is used for purifying a dilute aqueous solution containing levulinic acid, a negative-pressure distillation and coarse purification technology is not needed, and energy consumption cost can be substantially reduced. Besides, the resin can be regenerated and recycled, has the advantages of high total exchange capacity, high exchange speed and the like, and has better practical value and popularization and application significance for reduction of levulinic acid purification cost and improvement of levulinic acid production efficiency.

Description

technical field [0001] The application belongs to the technical field of levulinic acid preparation, and in particular relates to a weakly basic anion exchange resin and a method for purifying levulinic acid using the resin. Background technique [0002] Levulinic acid is a multifunctional compound containing carbonyl, α-hydrogen and carboxyl groups. It is the basic raw material for the synthesis of various light chemical products. It has wide application value in organic synthesis, industry, agriculture and medicine. For example: γ-valerolactone, the hydrogenated product of levulinic acid, is a high-grade solvent and can be used as an intermediate product for the production of synthetic rubber, cold-resistant plasticizers and surfactants; chlorinated levulinic acid can be used as an inhibitor of industrial circulating water Bacterial agents; amine salts of chlorinated levulinic acid can be used as herbicides and defoliants in agriculture; in medicine, its calcium salts can ...

Claims

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Application Information

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IPC IPC(8): B01J41/12C07C51/47C07C59/185
CPCB01J41/12C07C51/47C07C59/185
Inventor 雷廷宙杨延涛林鹿李自杰徐海燕王志伟关倩陈高峰李学琴杨淼辛晓菲吴艺峰郜毅于显敬
Owner ENERGY RES INST CO LTD HENAN ACADEMY OF SCI