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Preparation technology of xylose

A preparation process and xylose technology, applied in the production of sugar, sugar production, food science and other directions, can solve the problems of large sewage discharge, serious environmental pollution, affecting the quality of xylose liquid products, etc., and reduce waste water discharge. , the effect of simplifying the process flow, good environmental benefits and economic benefits

Active Publication Date: 2013-11-27
SHANDONG FUTASTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation process of xylose to solve the problems in the prior art such as large sewage discharge, serious environmental pollution, neutralization process affecting the quality of xylose liquid products, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Put 100kg of corncobs into the hydrolysis tank, pre-treat with a sulfuric acid solution with a mass concentration of 0.5% and hot water at 80°C, add a sulfuric acid solution with a mass concentration of 1.5% as a catalyst at a solid-to-liquid ratio of 1:5, and heat it at 140°C After hydrolysis for 1 hour, 400 liters of xylose hydrolyzate was obtained, with a dry matter concentration of 9.8%, a total acid mass concentration of 1.25%, a xylose mass content of 65.1% in the dry matter of the hydrolyzate, and an electrical conductivity of 19500 μs / cm. Add a little waste activated carbon to the xylose hydrolyzate, stir evenly, and filter to remove suspended impurities therein to obtain a xylose hydrolyzate with a light transmittance of 5.5%, and then inject the hydrolyzate into a filter with a molecular weight of 20,000- In the 50,000 ultrafiltration membrane device, the pressure before the membrane is controlled to be 0.6MPa, the pressure behind the membrane is 0.4MPa, and th...

Embodiment 2

[0047] Put 50kg of bagasse into the hydrolysis kettle, after pretreatment with hydrochloric acid solution with a mass concentration of 0.3% and hot water at 70°C, add a hydrochloric acid solution with a mass concentration of 0.8% as a catalyst at a solid-to-liquid ratio of 1:15. Under hydrolysis for 8 hours, 580 liters of xylose hydrolyzate was obtained, the dry matter concentration was 4.1%, the total acid mass concentration was 0.72%, the xylose mass content in the hydrolyzate dry matter was 52.5%, and the conductivity was 17000 μs / cm. Add a little waste activated carbon to the xylose hydrolyzate, stir evenly and filter to remove the suspended impurities therein to obtain a xylose hydrolyzate with a light transmittance of 7%, then put the hydrolyzate into the filter with a molecular weight of 20,000- In the 50,000 ultrafiltration membrane device, the pressure before the membrane is controlled to be 0.5MPa, the pressure behind the membrane is 0.4MPa, and the dialysis flow rate...

Embodiment 3

[0051] Put 450kg of papermaking wastewater into the hydrolysis kettle, add 450g of phosphated niobium pentoxide, and hydrolyze it at 110°C for 5 hours to obtain 400 liters of xylose hydrolyzate with a dry matter concentration of 5.1% and a total acid concentration of 0.89% , the mass content of xylose in the dry matter of the hydrolyzate was 65.1%, and the conductivity was 19500μs / cm. Add a little waste activated carbon to the xylose hydrolyzate, stir evenly, and filter to remove suspended impurities therein to obtain a xylose hydrolyzate with a light transmittance of 5.5%, and then inject the hydrolyzate into a filter with a molecular weight of 20,000- In the 50,000 ultrafiltration membrane device, the pressure before the membrane is controlled to be 0.6MPa, the pressure behind the membrane is 0.4MPa, and the dialysis flow rate is 3L / min to further remove organic substances such as colloids, proteins and some macromolecular pigments in the xylose hydrolyzate. Impurities. The...

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Abstract

The invention provides a preparation technology of xylose, which mainly comprises the following technical steps: hydrolyzation, ultrafiltration purification, primary decoloring, electrodialytic deacidification and desalination, membrane concentration, primary evaporation and concentration, secondary decoloring, ion exchange refined desalting, secondary evaporation and concentration, crystallization, centrifugation, and drying to obtain a finished product xylose crystal. The technology has the advantages that the membrane technology is used to remove macromolecule impurities of colloid, protein, and the like in xylose hydrolysate, electrodialytic deacidification and desalination technology is used to lower the electric conductivity of an xylose solution, and meanwhile, neutralization and positive-negative-positive resin combined one-step purification process is removed to simplify the technical process; therefore, the manufacturing cost of xylose is lowered, meanwhile, the waste water discharge load of the manufacturing of xylose can be allowed to be lowered by more than 40%, and well environmental benefits and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of functional sugar production, and in particular relates to a preparation process of xylose. Background technique [0002] The production of xylose products is based on agricultural waste such as corn cobs, bagasse, cottonseed hulls, etc., through hydrolysis-neutralization-decolorization-primary purification and purification of yang, yin and yang-first evaporation and concentration-secondary purification of yin, yang and yin The white crystals prepared by the process of secondary purification and purification-secondary evaporation concentration-crystallization-centrifugation-drying, etc., according to this process to prepare xylose products, the process is long and consumes a lot of water, electricity, steam, acid, alkali and other auxiliary materials, especially The amount of sewage produced is large, causing certain harm to the environment. In the neutralization process, when adding light calcium carbonat...

Claims

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Application Information

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IPC IPC(8): C13K13/00
Inventor 高永旭王成福王星云杜瑞锋张亮黄伟红
Owner SHANDONG FUTASTE
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