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Sequential Simulated Moving Bed Separation of Sugar and Acid in Corn Stalk Acid Hydrolysis Solution

A technology for simulating moving beds and corn stalks, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, preparation of carboxylate salts, etc., can solve the problems of high solution recovery cost, low production efficiency, etc. , energy saving, good separation effect

Active Publication Date: 2018-01-26
HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a sequential simulated moving bed separation method for sugar and acid in corn stalk acid hydrolysis solution, this sequential simulated moving bed separation method for sugar and acid in corn stalk acid solution is suitable for solving the traditional simulated moving bed separation process The problems of high solution recovery cost and low production efficiency in the separation of sugar and acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for the sequential simulated moving bed separation of sugar and acid in corn stalk acid hydrolysis solution is as follows:

[0023] a. Preparation of corn stalk acid hydrolysis solution: dry and crush the corn stalk through a 40-mesh sieve, weigh 2 g of corn stalk powder, add 100 mL of sulfuric acid solution with a volume concentration of 3%, place it in a microwave extractor, and adjust the microwave power to 700W , the temperature was 80° C., and the reaction was carried out for 153 minutes to obtain corn stalk acid hydrolyzate.

[0024] b. Filter the acid hydrolyzed solution of corn stalks prepared in step a with filter paper to obtain a clear dark brown liquid, and concentrate it to a concentration of sulfuric acid in the solution of 519.4 mg / mL and a concentration of sugar solution of 61.49 mg / mL using a rotary evaporator.

[0025] c. Sequential simulated moving bed separation: the treated corn stalk acid hydrolysis solution is separated by sequential si...

Embodiment 2

[0030] The method for the sequential simulated moving bed separation of sugar and acid in corn stalk acid hydrolysis solution is as follows:

[0031]a. Preparation of corn stalk acid hydrolysis solution: dry and pulverize the corn stalks, weigh a certain amount of corn stalks, add a sulfuric acid solution with a volume concentration of 3% according to the ratio of solid to liquid 1:50, place in a microwave extractor, adjust The microwave power was 700W, the temperature was 80°C, and the reaction was carried out for 153 minutes to obtain the corn stalk acid hydrolyzate.

[0032] b. Filter the acid hydrolyzed solution of corn stalks prepared in step a with filter paper to obtain a clear dark brown liquid, and use a rotary evaporator to concentrate it to a concentration of sulfuric acid in the solution of 562.3 mg / mL and a concentration of sugar solution of 65.8 mg / mL.

[0033] c. Sequential simulated moving bed separation: the treated corn stalk acid solution is separated by seq...

Embodiment 3

[0038] The method for the sequential simulated moving bed separation of sugar and acid in corn stalk acid hydrolysis solution is as follows:

[0039] a. Preparation of corn stalk acid hydrolysis solution: dry and pulverize the corn stalks, weigh a certain amount of corn stalks, add a sulfuric acid solution with a volume concentration of 3% according to the ratio of solid to liquid 1:50, place in a microwave extractor, adjust The microwave power was 700W, the temperature was 80°C, and the reaction was carried out for 153 minutes to obtain the corn stalk acid hydrolyzate.

[0040] b. Filter the acid hydrolyzed solution of corn stalks prepared in step a with filter paper to obtain a clear dark brown liquid, and use a rotary evaporator to concentrate it to a concentration of sulfuric acid in the solution of 616.1 mg / mL and a concentration of sugar solution of 70.2 mg / mL.

[0041] c. Sequential simulated moving bed separation: the treated corn stalk acid solution is separated by se...

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Abstract

The present invention relates to a sequential simulated moving bed method for separating sugar and acid in corn stalk acidolysis solution, which specifically comprises: separating corn stalk acid solution through sequential simulated moving bed chromatographic equipment, and in the separation stage, eight chromatographic columns are connected in series , the liquid in the column is pumped out by the circulation pump under the third column and injected into the fourth column, and the liquid in the fourth column is injected into the fifth column, and the cycle operation is sequential; in the desorption stage, the desorbent enters the upper part of the first column, Sulfuric acid solution is released under the sixth column; in the feed desorption stage, the upper part of the first column enters the desorbent, the upper part of the fifth chromatographic column enters the corn stalk acid hydrolysis solution, and the sugar solution is released under the first column. Sulfuric acid solution is released under the first chromatographic column; the concentration of the separated sulfuric acid solution is 210mg / mL-320mg / mL, and the concentration of the sugar solution is 20mg / mL-41mg / mL; the sulfuric acid solution is concentrated and recovered; the sugar solution is concentrated by filtration. The invention has high sulfuric acid concentration after separation and high sugar solution concentration, solves the problem of sulfuric acid recovery in corn stalk reuse, and has low cost.

Description

1. Technical field [0001] The invention relates to the separation technology of sulfuric acid and sugar solution in the corn stalk acid hydrolysis solution, in particular to a sequential simulated moving bed separation method for sugar and acid in the corn stalk acid hydrolysis solution. 2. Background technology [0002] my country is a large agricultural country with abundant fiber resources of various crops. Straw alone reaches more than 700 million tons per year, including about 220 million tons of corn stalks. But at present, except a small part is used as feed for ruminants, the rest is mostly burned with fuel, causing serious air pollution. Corn stover contains a large amount of cellulose and hemicellulose, which can be converted into sugar through various pathways, and can be used as a source of low-cost raw materials for the fermentation industry. [0003] Corn stalk sugar is mainly produced by sulfuric acid hydrolysis and enzymatic degradation. Among them, due to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/00C07C51/47C07C59/105
CPCC07C51/00C07C51/47C07C59/105
Inventor 曹龙奎李洪飞李文杰
Owner HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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