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Pretreatment method of xylose mother liquor

A xylose mother liquor and pretreatment technology, which is applied in sugar production, xylose production, sugar production, etc., can solve the problems of high cost, easy scaling and blockage of transportation pipelines, cumbersome impurity removal process, etc., to achieve cost saving, Prevent clogging and avoid the effect of impurity removal process

Pending Publication Date: 2020-12-04
JIAOZUO HUAKANG POLYOL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method is mainly the carbonic acid method. This method needs to be filled with carbon dioxide after adding slaked lime. Additional impurities are added to the xylose mother liquor. The transportation pipeline is easy to scale and block, and the impurity removal process is cumbersome and costly. Follow-up calcium carbonate is added. Waiting for solid waste

Method used

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  • Pretreatment method of xylose mother liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A pretreatment method for xylose mother liquor, comprising the following steps: step 1, diluting: diluting the xylose mother liquor to a refraction of 30% to obtain a dilution; step 2, primary membrane filtration: passing the dilution obtained in step 1 through 10KD Tubular membrane, the permeate obtained is the primary membrane filtrate; step 3, secondary membrane filtration: heat the primary membrane filtrate obtained in step 2 to 38°C, and then pass the heated primary membrane filtrate through 0.6KD Membrane equipment, control the inlet pressure between 23bar and control the temperature between 42°C-44°C, add pure water to elute after feeding until a small amount of feed liquid remains, and elute until the refraction of the dialysate drops to 3, and the pressure drops to 15 bar, continue to add water for elution until the refraction of the dialysate falls below 1 and stop to obtain the membrane treatment solution.

Embodiment 2

[0018] A pretreatment method for xylose mother liquor, comprising the following steps: step 1, diluting: diluting the xylose mother liquor to a refractive index of 33% to obtain a dilution; step 2, primary membrane filtration: passing the dilution obtained in step 1 through 10KD Tubular membrane, the permeate obtained is the primary membrane filtrate; step 3, secondary membrane filtration: heat the primary membrane filtrate obtained in step 2 to 40°C, and then pass the heated primary membrane filtrate through 0.6KD Membrane equipment, control the inlet pressure between 25bar and control the temperature between 42°C-44°C, add pure water to elute after feeding until a small amount of feed liquid remains, and elute until the refraction of the dialysate drops to 3, and the pressure drops to 15 bar, continue to add water for elution until the refraction of the dialysate falls below 1 and stop to obtain the membrane treatment solution.

Embodiment 3

[0020] A pretreatment method for xylose mother liquor, comprising the following steps: step 1, diluting: diluting the xylose mother liquor to a refractive index of 35% to obtain a dilution; step 2, primary membrane filtration: passing the dilution obtained in step 1 through 10KD Tubular membrane, the permeate obtained is the primary membrane filtrate; step 3, secondary membrane filtration: heat the primary membrane filtrate obtained in step 2 to 43°C, and then pass the heated primary membrane filtrate through 0.6KD Membrane equipment, control the inlet pressure between 27bar and control the temperature between 42°C-44°C, add pure water to elute after feeding until a small amount of feed liquid remains, and elute until the refraction of the dialysate drops to 3, and the pressure drops to 15 bar, continue to add water for elution until the refraction of the dialysate falls below 1 and stop to obtain the membrane treatment solution.

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Abstract

The embodiment of the invention relates to the technical field of xylose processing, and particularly relates to a pretreatment method of xylose mother liquor. The method comprises the steps of step 1, dilution, specifically, diluting the xylose mother liquor until the refraction is 25-40% to obtain a diluent; step 2, primary membrane filtration, specifically, enabling the diluent obtained in thestep 1 to pass through a 10KD tubular membrane to obtain permeate which is primary membrane filtrate; and steps 3, secondary membrane filtration, specifically, heating the primary membrane filtrate obtained in the second step to the temperature of 35 DEG C to 45 DEG C, then enabling the heated primary membrane filtrate to pass through 0.6KD membrane equipment, adding pure water for elution when asmall amount of residual feed liquid is left, conducting elution till the refraction of dialysate is reduced to 3, continuously adding water for elution till the refraction of dialysate is below 1, and obtaining membrane treatment liquid. The method has the beneficial effects that macromolecular colloid and part of pigment are filtered by the membrane, the method is a pure physical process, and the production process is simple; no solid waste is generated, and environmental friendliness is achieved; and the conveying pipeline is prevented from being blocked, the tedious subsequent impurity removal process is avoided, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of xylose processing, in particular to a pretreatment method for xylose mother liquor. Background technique [0002] Xylose is a five-carbon sugar made from corn cobs through hydrolysis, crystallization and refining. The xylose mother liquor left after xylose crystallization contains about 50% xylose. At present, there are many manufacturers producing xylose in China. With the increase of xylose production, a large amount of by-products—xylose mother liquor will be produced while producing xylose. Due to the complex composition of the mother liquor, most manufacturers use The sale of xylose mother liquor at a lower price has prevented the real comprehensive utilization of xylose mother liquor. [0003] Chromatographic separation and extraction of xylose and other monosaccharides from xylose mother liquor is the method with the highest utilization value of xylose mother liquor. However, the chromatographic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
CPCC13K13/002
Inventor 师月云郭彬承田慧娟郑晓阳王明陆赵恒章孟凡路
Owner JIAOZUO HUAKANG POLYOL CO LTD