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Method for extracting xylose from poly pentose acidolysis liquid

A technology of acid hydrolysis solution and extraction method of polypentose, which is applied in the direction of chemical instruments and methods, monosaccharides, sugar derivatives, etc., can solve the problems of "three wastes" discharge polluting the environment, inability to adapt, and large acid and alkali consumption, etc. Achieve the effects of cost reduction, low cost, and less acid and alkali usage

Active Publication Date: 2010-08-18
ANHUI BBCA FERMENTATION TECH ENG RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned production process consumes a lot of acid and alkali in the production process, and there are serious problems such as "three wastes" discharging and polluting the environment, which cannot meet the current goal of establishing an energy-saving, emission-reducing and environment-friendly society advocated by the state.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using corn cob as raw material, after removing impurities, rinsing, washing with hot water, washing with dilute sulfuric acid, hydrolyzing with sulfuric acid to obtain polypentose acid hydrolysis solution; its main components are xylose and a small amount of glucose, arabinose, etc. (Note: the following implementation The polypentose acid hydrolyzate in the example is the same as this).

[0027] 1. Heat 45L polypentose acid solution to 80°C, add 700g of light calcium carbonate, adjust pH=3.32, neutralize and remove part of the sulfate radical; keep warm at 80°C for 1 hour, filter, then add 220g Waste carbon (activated carbon used for decolorization of the previous acidolysis solution) was pre-decolorized and kept for 0.5h;

[0028] After decolorization, the sulfate radical content in the acidolysis solution is 1432mg / L, and the calcium ion content is 580mg / L;

[0029] 2. Then add 225g of powdered activated carbon and keep it warm for 0.5h at a temperature of 55°C; the ...

Embodiment 2

[0035] 1. Heat 45L polypentose acid solution to 80°C, add 700g of light calcium carbonate, adjust pH=3.24, remove part of the sulfate radical; keep warm at 80°C for 1 hour, filter, then add 225g of waste carbon ( The activated carbon used in the decolorization of the previous acidolysis solution) was pre-decolorized and kept for 0.5h;

[0036] After decolorization, the sulfate radical content in the acidolysis solution is 1495 mg / L, and the calcium ion content is 520 mg / L.

[0037] 2. Then add 225g of powdered activated carbon and keep it warm for 0.5h at a temperature of 55°C; the light transmittance of the acid solution after decolorization is 78%;

[0038]3. Perform ion exchange on the above-mentioned decolorized acid solution, first pass through the strong acid type cationic resin 001*7, so that the iron ion content in the acid solution is 2 mg / L; then pass through the weak base type anion resin D301, make the acid solution Sulfate content is 18mg / L;

[0039] Then concen...

Embodiment 3

[0043] 1. Heat 45L polypentose acid solution to 80°C, add 650g light calcium carbonate, adjust pH=3.14, remove part of the sulfate radical; keep warm at 80°C for 1 hour, filter, then add 225g waste carbon (The activated carbon used in the decolorization of the previous acidolysis solution) was pre-decolorized and kept warm for 0.5h;

[0044] After decolorization, the sulfate radical content in the acidolysis solution is 1452 mg / L, and the calcium ion content is 480 mg / L.

[0045] 2. Then add 225g of powdered activated carbon and keep it warm for 0.5h at a temperature of 55°C; the light transmittance of the acid solution after decolorization is 75%;

[0046] 3. Perform ion exchange on the decolorized acid solution, first pass through the strong acid cationic resin HZ-016, so that the iron ion content in the acid solution is 2mg / L; then pass through the weak base anion resin D315, make the acid solution Sulfate content is 14mg / L;

[0047] Then concentrated by reverse osmosis m...

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Abstract

The invention provides a method for extracting xylose from poly pentose acidolysis liquid, including the following steps: poly pentose acidolysis liquid is neutralized by calcium carbonate, then pre-destaining is carried out, and then active carbon is used for destaining; strong acid cation resin and weak base anion resin are sequentially used for carrying out ion exchange, and then reverse osmosis membrane is used for concentration; concentrated solution is destained by active carbon column and sequentially passes through the strong acid cation resin and weak base anion resin, and finally heat response concentration and crystallization are carried out. The invention overcomes the defect that content of acetate after concentration is improved by utilizing reverse osmosis membrane concentrated acidolysis liquid, cost is reduced, and dialysate thereof can be further taken as washing water in crystallization of wood sugar, thus cost is further reduced; besides, acid-base dosage of the method in the invention is less, the method is environmentally friendly, cost is lower, productivity is high, purity is good, and the method is applicable to industrialization production.

Description

technical field [0001] The invention relates to the field of sugar production technology, in particular to a method for separating and extracting xylose from polypentose acid hydrolyzate. Background technique [0002] Xylose has more than 40 years of production experience in my country, and the production technology has reached the world level. At present, my country is already the world's largest producer and exporter of xylose, and with the development of the economy and the improvement of living standards, the domestic market continues to expand, providing excellent conditions for the further development of the xylose industry. At present, the production of xylose generally adopts a relatively traditional production process, mainly to separate and extract xylose after hydrolyzing the plant raw materials containing polypentose. The plant raw materials rich in pentose include corncobs, straws, bagasse, etc. my country is a large agricultural country with an annual output o...

Claims

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Application Information

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IPC IPC(8): C07H3/02C07H1/06
Inventor 李荣杰薛培俭尚海涛邓远德张雪锋张毅李倩
Owner ANHUI BBCA FERMENTATION TECH ENG RES
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