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.