The invention provides a
xylose preparation method. The
xylose preparation method mainly comprises the following steps: treating a
raw material containing celluloses and hemicelluloses so as to obtain a
xylose-containing solution; destaining the xylose-containing solution by using
activated carbon, and then purifying the xylose-containing solution so as to obtain a destaining solution; carrying out protective
filtration and / or spiral-wound membrane
filtration on the destaining solution, then carrying out single
vaporization and concentration on the destaining solution, desalting by using
electrodialysis equipment so as to obtain
electrodialysis liquid, carrying out membrane concentration on the
electrodialysis liquid so as to obtain a membrane concentrated solution, finally carrying out single
vaporization and concentration, destaining by using the
activated carbon, carrying out
ion exchange and secondary
vaporization and concentration, crystallizing and centrifuging so as to obtain xylose crystals. The xylose preparation method has the advantages that the acid-base consumption and the
water consumption are reduced by using electrodialysis
desalination and membrane concentration for replacing
calcium carbonate or
lime neutralization, primary
ion exchange and primary
evaporation and concentration in a conventional technology, water can be saved by 55-75%, and the
sewage discharge is substantially reduced; and the purposes of
energy conservation, consumption reduction,
pollution reduction and clean and efficient production are realized by adopting the technology.