Economic process for producing xylose from hydrolysate using electrodialysis and direct recovery method

摘要

The present invention relates to an environmentally friendly, simple and economic process for producing xylose. The process comprises the steps of: a) countercurrently extracting tropical fruit biomass by hydrolysis with sulfuric acid to obtain a high-concentration xylose extract; b) adjusting the extract to a pH of 1.5-2.5 and decolorizing and filtering the pH-adjusted extract; c) desalting the filtrate in an electrodialysis device; and d) recycling a waste sulfuric acid solution recovered from step c), to step a), and concentrating and directly recovering the desalted filtrate to obtain xylose crystals.

主权项

1. A process for producing xylose by hydrolyzing tropical fruit biomass with sulfuric acid, the process comprising the steps of:
a) countercurrently extracting tropical fruit biomass by hydrolysis with sulfuric acid to obtain an extract; b) adjusting the extract to a pH of 1.5-2.5 and decolorizing and filtering the pH-adjusted extract to obtain a filtrate; c) desalting the filtrate in an electrodialysis device; and d) recycling a waste sulfuric acid solution recovered from step c), to step a), and concentrating and directly recovering the desalted organic material to obtain xylose crystals, wherein the process does not comprise a step of precipitation, neutralization and ion-exchange.