Novel production technique of xylose

A production process, a new process technology, applied in the direction of sugar derivatives, sugar derivatives, sugar derivatives preparation, etc., can solve the problems of large amount of ion exchange resin, reduce equipment utilization, easy to form a heat insulation layer, etc., to achieve reduction Ash and acid content, quality improvement, effect of product quality improvement

Active Publication Date: 2009-03-25
SHANDONG LONGLIVE BIO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a new xylose production process to solve the problem that the prior art is easy to form a heat insulation layer, reduces evaporation effici

Method used

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Examples

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Example Embodiment

[0046] Taking corncob production of xylose as an example, the specific production process is as follows:

[0047] 1. Pretreatment

[0048] Since the corncob raw materials contain impurities such as ash, gum, pectin, etc., pre-treatment is required to remove the impurities before hydrolysis. First, use a cleaning machine to remove dust and fine debris, and use a drum washing machine to wash the raw material corncobs. Dust, sundries, and pigments are washed away, so that they can see their true colors and free of sundries. 3.2T of corncob raw material every time, add 12m 3 Treat with 0.1% dilute sulfuric acid, pressurize to 0.05Mpa, and drain the treatment solution after maintaining the pressure for 60 minutes. Then add 12 cubic meters of water for treatment, pressurize to 0.05Mpa, hold the pressure for 30 minutes, and drain the treatment liquid.

[0049] 2. Hydrolysis

[0050] Using the principle of hydrolysis, the polypentose in the corncob is at a pressure of 0.13Mpa, 12m 3 Under...

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Abstract

The invention discloses a new manufacturing technique of a xylose and relates to a technique for manufacturing the xylose. The technique adopts the technology of electrodialysis recycling sulphuric acid, a bag adopted by a nanofiltration concentration device and a special nanofiltration separation system concentrates the liquid in the technique for manufacturing the xylose at normal temperature, therefore water and other impurities can be removed from the product; the manufacturing technique comprises: 1. pretreatment, 2. hydrolyzation, 3. decoloration, 4. electrodialysis, 5. ion exchange, 6. nanofiltration, 7. concentration, 8. ferment, 9. crystallization, 10. centrifugation, and 11. drying, then the high purity xylose is obtained. The new manufacturing technique of the xylose can not only recycle 50 percent sulphuric acid in the hydrolyze liquid, but also can recycle waste acid and spent caustic produced in the regenerative process of duolite, therefore the dosage of sulphuric acid can be saved and the environment pollution is avoided. The technique solves the problems of scale formation in device in the neutralizing deacidification technique, large usage of duolite in deacidification technique, large usage of devices, large investment, large consumption of acid and alkali, high costs and the like; thus improving the device utilization rate and the service life, decreasing the ash and the acid contents in the hydrolyze liquid, improving the quality of the hydrolyze liquid and enhancing the product quality and separating efficiency.

Description

technical field [0001] The invention relates to a process for producing xylose. Background technique [0002] At present, the preparation methods of xylose mainly include neutralization deacidification process and ion exchange deacidification process. [0003] Neutralization deacidification process to prepare xylose The process route of neutralization method to prepare xylose is: raw material (i.e. agricultural fiber waste), successively undergoes raw material pretreatment, hydrolysis, neutralization, decolorization, ion exchange, concentration, crystallization, and final separation Xylose crystals are obtained. Due to the gypsum (CaSO 4 ) Eventually, a part of gypsum will be deposited on the tube wall of the evaporator, forming a heat insulation layer, reducing the evaporation efficiency, wasting steam, and reducing the utilization rate of the equipment. Because this layer of scaling is difficult to remove, especially difficult to remove by chemical methods, it is not on...

Claims

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Application Information

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IPC IPC(8): C07H3/02C07H1/00
Inventor 程少博白庆林肖林阎金龙徐东生覃树林
Owner SHANDONG LONGLIVE BIO TECH CO LTD
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