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Method for efficiently separating and purifying sugar and acid in bio-based material hydrolysate

A technology for separation, purification and hydrolysis, applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve the problems of affecting the life of separation materials, poor separation effect, equipment complexity, etc., and achieve low equipment requirements. , the effect of fast mass transfer rate and low waste liquid volume

Active Publication Date: 2022-05-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]The limitation of using cation exchange resin to separate sugar-acid system is that it must be combined with simulated moving bed to realize the segmentation of each component, and the equipment complexity of simulated moving bed and more difficult to maintain than HPLC
The main disadvantage of using anion exchange resin is that the sugar recovery liquid contains a small amount of acid, which can inhibit the subsequent fermentation process
At the same time, the anion exchange resin separation process is only for the inorganic acid system. When there is an organic acid in the system, the organic acid ion and the anion exchange resin will produce ion exchange, which will make the separation effect poor and affect the life of the separation material.

Method used

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  • Method for efficiently separating and purifying sugar and acid in bio-based material hydrolysate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Sample loading: The bio-based material hydrolyzate (sugar-acid mixture) is loaded into the reciprocating flow low bed containing the amphoteric solid phase separation material. The effluent is recovered in two stages, namely the dead volume area and the sugar recovery area.

[0042] Wherein, the sugar-acid mixture is 5% glucose-20% sulfuric acid-2% acetic acid. The amphoteric solid phase separation material: specific surface area: 1600m 2 / g, the particle size is 85 μm, and the distribution difference of the particle size is ±10 μm. The terminal of the amphoteric solid phase separation material is a penetrating amphoteric group of quaternary ammonium and carboxylic acid, the exchange amount of basic group: 2.8mmol / g, and the exchange amount of acid group: 2.4mmol / g. The reciprocating flow low bed is a column bed with a ratio of height to diameter of 1.5:1. The sample loading flow rate is 6BV / h.

[0043] (2) Elution: elution with pure water from the other end of ...

Embodiment 2

[0048] (1) Sample loading: The bio-based material hydrolyzate (sugar-acid mixture) is loaded into the reciprocating flow low bed containing the amphoteric solid phase separation material. The effluent is recovered in two stages, namely the dead volume area and the sugar recovery area.

[0049] Among them, the sugar-acid mixture is 5% glucose, 2% fructose-8% hydrochloric acid-2% acetic acid. The amphoteric solid phase separation material: specific surface area: 1600m 2 / g, the particle size is 40 μm, and the distribution difference of the particle size is ±10 μm. The end of the solid phase separation material is a penetrating amphoteric group of quaternary ammonium and carboxylic acid, the exchange capacity of basic groups: 3.8mmol / g, and the exchange capacity of acidic groups: 2.6mmol / g. The reciprocating low bed is a column bed with a ratio of height to diameter of 1.5:1. The sample loading flow rate is 1BV / h.

[0050] (2) Elution: elution with pure water from the other e...

Embodiment 3

[0055] (1) Sample loading: The bio-based material hydrolyzate (sugar-acid mixture) is loaded into the reciprocating flow low bed containing the amphoteric solid phase separation material. The effluent is recovered in two stages, namely the dead volume area and the sugar recovery area.

[0056] Wherein, the sugar-acid mixed solution is 5% glucose-10% sulfuric acid-1% acetic acid. The amphoteric solid phase separation material: specific surface area: 1600m 2 / g, the particle size is 100 μm, and the distribution difference of the particle size is ±10 μm. The terminal of the solid phase separation material is a penetrating amphoteric group of quaternary ammonium and carboxylic acid, the exchange capacity of the basic group: 2.5mmol / g, and the exchange capacity of the acid group: 2.1mmol / g. The reciprocating low bed is a column bed with a ratio of height to diameter of 1.5:1. The sample loading flow rate is 10BV / h.

[0057] (2) Elution: elution with pure water from the other en...

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Abstract

The invention discloses a method for efficiently separating and purifying sugar and acid in bio-based material hydrolysate, which comprises the following steps of: loading the bio-based material hydrolysate into a reciprocating flow short bed which takes an amphoteric solid-phase separation material as a stationary phase, and recovering effluent in two sections, namely a dead volume area and a sugar recovery area; eluting from the other end of the reciprocating flow short bed by using an eluent, and collecting the recovered effluent in two sections, namely a sugar-acid mixed solution and an acid recovery area; repeating the steps until the solid-phase separation material has no separation effect; wherein the amphoteric solid-phase separation material takes a styrene-divinyl benzene copolymer as a skeleton structure, and the tail end of the styrene-divinyl benzene copolymer is a quaternary ammonium and carboxylic acid penetrating amphoteric group.

Description

technical field [0001] The invention belongs to the field of renewable new energy and environment, and specifically relates to a method for efficiently separating and purifying sugar and acid in hydrolyzate of bio-based materials. Background technique [0002] At present, the preparation of environmentally friendly chemical products and green energy from lignocellulosic agricultural and forestry wastes is the only way to achieve sustainable development. The research and development of cellulose saccharification technology in agricultural waste is an important way to rationally utilize agricultural resources and protect the rural ecological environment. [0003] At present, there are two main ways to produce sugar by hydrolysis of cellulose: 1. Enzymatic hydrolysis, 2. Hydrolysis. Since the large-scale production process of enzymatic hydrolysis is not yet mature, the industry often uses agricultural waste rich in cellulose and hemicellulose, such as corncobs, straw, and baga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/08B01D15/42B01J20/285B01J20/30
CPCB01D15/08B01J20/285B01D15/424
Inventor 江伟任连兵魏士明周悦张全兴
Owner NANJING UNIV
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