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Xylose mother liquid processing method

A xylose mother liquor and processing method technology, applied in chemical instruments and methods, monosaccharides, sugar derivatives, etc., can solve the problems of high cost, complex process, difficult industrial application, etc., and achieve less pollutant discharge and process flow. Concise, actionable effect

Active Publication Date: 2015-09-09
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above method can crystallize xylose from xylose mother liquor, but this method has problems such as complicated process and high cost, and is difficult to be applied industrially

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] With 1000g xylose mother liquor (xylose content 31.5% in xylose mother liquor, other miscellaneous sugar content 24%), use single-effect evaporator to concentrate to after sugar concentration 80%, heat up to 70 ℃, then begin to cool down, reduce 0.3 per hour ℃, when the temperature drops to 60℃, add 0.83g seed crystals, and crystallize when the temperature drops to 20℃. After the crystallization is completed, press it with a plate and frame press. The purity of xylose is 75%. After dissolving, 154g of finished product xylose can be obtained through recrystallization. The purity of xylose is 99%, and the yield of xylose is 48.4%.

Embodiment 2

[0051] With 1000g xylose mother liquor (xylose content 29.8% in the xylose mother liquor, other miscellaneous sugar content 25.6%), after concentrating to sugar concentration 85% with single-effect evaporator, be heated up to 80 ℃, begin to cool down then, reduce 1 per hour. ℃, when the temperature drops to 70℃, add 4.12g of seed crystals, and when the temperature drops to 25℃, add 165g of methanol for crystallization. After the crystallization is completed, use a centrifuge to centrifuge. The purity of xylose in the product is 70%. After dissolving, 135g of finished xylose can be obtained through recrystallization. The purity of xylose is 99%, and the yield of xylose is 45.3%.

Embodiment 3

[0053] With 1000g xylose mother liquor (xylose content 27.4% in the xylose mother liquor, other miscellaneous sugar content 27.6%), after concentrating to sugar concentration 92% with single-effect evaporator, be warming up to 75 ℃, begin to cool down then, reduce 1 per hour. ℃, when the temperature drops to 65℃, add 7.52g of seed crystals, and when the temperature drops to 25℃, add 42.5g of frozen water for crystallization. In miscellaneous sugar liquid, the purity of xylose in the crystallization product is 70%. After dissolving, 117g of finished xylose can be obtained through recrystallization. The purity of xylose is 99%, and the yield of xylose is 42.7%.

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Abstract

The invention provides a xylose mother liquid processing method. The method includes the steps of a), concentrating xylose mother liquid to 80-92% of total sugar concentration to obtain the concentrated xylose mother liquid; b), raising the temperature of the concentrated xylose mother liquid to 70-80 DEGC, then starting to cool down to 60-70 DEG C, adding seed crystal, and crystallizing when the temperature drops to 20-25 DEG C to obtain a crystallized product and first mixed sugar liquid; c), performing recrystallization on the crystallized product obtained in the step b) to obtain xylose and the mixed sugar liquid. The xylose mother liquid can be directly crystallized by the process of controlling first time crystallization, the process is concise and high in operability, and yield of the xylose is high; experiment result shows that purity of the xylose is 99% and the yield ranges from 40% to 50%.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, and in particular relates to a treatment method of xylose mother liquor. Background technique [0002] Xylose mother liquor is a by-product obtained after producing crystalline xylose from corn cobs. The main components are xylose, arabinose, glucose and galactose, etc., and the total sugar concentration is about 65-70%. Among them, xylose and L-arabinose are non-fermentable sugars, accounting for 70% of the total sugar, and the value of these two sugars is very high; glucose, galactose, etc. are fermentable sugars, accounting for 26% of the total sugar. The value is low; other sugar components include miscellaneous sugars such as mannose and rhamnose, accounting for 4% of the total sugar. Because the xylose mother liquor has high miscellaneous sugar content and low xylose purity, it is difficult to purify the xylose crystals in the mother liquor. At present, the large-scale applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/02C07H1/08
Inventor 唐一林江成真张茜高绍丰李国辉
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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