Process for producing xylose

A production process and technology of xylose, applied in the production of sugar, sugar production, food science and other directions, can solve the problems of easy flux attenuation, easy membrane pollution, sugar leakage, etc., to reduce production costs, ensure stability, The effect of reducing energy consumption

Inactive Publication Date: 2012-07-18
FUTASTE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a xylose production process to solve the disadvantages of using a multi-effect evaporator in the current xylose concentration process to overcome the leakage of xylose in the membrane concentration process, the membrane is easy to Problems of pollution and easy attenuation of flux

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] (1) Hydrolysis: Take 800kg of clean corncob, add sulfuric acid to the corncob for hydrolysis, adjust the concentration of inorganic acid to 0.9%, the mass ratio of sulfuric acid solution to corncob is 1:7, hydrolysis temperature control After 120 minutes of hydrolysis at 110°C, a hydrolysate is obtained;

[0024] (2) Neutralization: Add a certain amount of light calcium carbonate to the hydrolysis solution obtained in step (1) within 40 minutes at 80°C for neutralization, and neutralize the pH value of the hydrolysis solution to 2.2 , Then keep it at 80℃ for 50 minutes, and then filter to obtain the neutralization liquid;

[0025] (3) One-time decolorization: Add powdered activated carbon to the neutralization solution prepared in step (2). The amount of powdered activated carbon added is 7% of the weight of the dry matter of the neutralization solution. Decolorize at 75°C for 40 minutes and filter to obtain decolorization The light transmittance of the decolorizing liquid ...

example 2

[0036] (1) Hydrolysis: Take 1030kg of clean corncob, add sulfuric acid to the corncob for hydrolysis, adjust the concentration of inorganic acid to 1.2%, the mass ratio of sulfuric acid solution to corncob is 1:12, hydrolysis temperature control After 180 minutes of hydrolysis at 90°C, a hydrolysate is obtained;

[0037] (2) Neutralization: Add a certain amount of light calcium carbonate to the hydrolysate obtained in step (1) within 45 minutes at 80°C for neutralization, and neutralize the pH of the hydrolysate to 2 , Then keep it at 80°C for 45 minutes, and then filter to obtain a neutralization solution;

[0038] (3 One-time decolorization: Add powdered activated carbon to the neutralization solution prepared in step (2). The amount of powdered activated carbon added is 5% of the weight of the dry matter of the neutralization solution. At 75°C, heat and decolorize for 45 minutes, and filter to obtain the decolorization solution , The light transmittance of decolorizing liquid i...

example 3

[0049] (1) Hydrolysis: Take 1206kg of cleaned corncob, add sulfuric acid to the corncob for hydrolysis, adjust the concentration of inorganic acid to 1.1%, the mass ratio of sulfuric acid solution to corncob is 1:10, hydrolysis temperature control After 60 minutes of hydrolysis at 125°C, a hydrolysate is obtained;

[0050] (2) Neutralization: Add a certain amount of light calcium carbonate to the hydrolysis solution obtained in step (1) within 55 minutes at 80°C for neutralization, and neutralize the pH value of the hydrolysis solution to 2.6 , And then keep it at 80℃ for 60 minutes, and then filter to obtain the neutralization liquid;

[0051] (3) One-time decolorization: Add powdered activated carbon to the neutralization solution prepared in step (2). The amount of powdered activated carbon added is 5% of the weight of the dry matter of the neutralization solution. Decolorize at 75°C for 60 minutes and filter to obtain decolorization The light transmittance of decolorizing liqu...

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PUM

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Abstract

The invention discloses a process for producing xylose and belongs to the technical field of the production of functional sugar. According to the process, a primary ion exchange liquid in the process for producing the xylose is treated by a membrane concentration technology, wherein a membrane core of a membrane system is a reverse osmosis membrane or a nanofiltration membrane of materials, and prevents sugar from being leaked; and a feed liquid is concentrated by the membrane system and then is not subjected to circular concentration. The process comprises the following steps of: hydrolyzing, neutralizing, performing primary decolorization, primary ion exchange, membrane concentration, multi-effect concentration, secondary decolorization, secondary ion exchange and vacuum concentration, crystallizing and centrifuging, drying, screening, and packaging to obtain a qualified xylose product. The process is energy-saving and consumption-reducing, so that the production cost of the xylose is greatly reduced, and the environment-friendly production of the xylose is realized; and meanwhile, the problems that the xylose is leaked in a membrane concentration process, the membrane is easy to pollute and the flux is easy to attenuate are solved.

Description

Technical field [0001] The invention belongs to the technical field of functional sugar production. Background technique [0002] Xylose is mainly produced from agricultural wastes such as corncobs and bagasse which are rich in polypentose, which are successively obtained through hydrolysis, neutralization, decolorization, ion exchange, concentration and crystallization processes. At present, the concentration process in the existing xylose production process uses a multi-effect evaporator for high temperature concentration. Because xylose is a five-carbon sugar containing aldehyde groups, it is prone to Maillard reaction to form pigment substances and make subsequent It is difficult to extract the products and the quality of the products is difficult to guarantee. In addition, due to the increase in coal prices, the price of steam has also soared. 47.5 tons of water needs to be removed, and at least 11.875 tons of steam is required if a multi-effect evaporator is used, which ca...

Claims

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Application Information

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IPC IPC(8): C13K13/00
Inventor 孙鲁邱学良高永旭杜瑞峰王学敏张亮
Owner FUTASTE PHARM CO LTD
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