The invention provides a method for preparing
fructose disodium phosphate by using waste beer
yeast, and belongs to the technical field of
organic synthesis. Comprising the following steps: (1) adding pure water into a reaction kettle, and then adding glucose,
sodium dihydrogen
phosphate,
magnesium chloride and
ammonium chloride into the pure water to obtain a reaction substrate; (2) adding waste beer
yeast and ATP (
adenosine triphosphate) into the reaction substrate, and reacting to obtain
fermentation liquor; (3) filtering the
fermentation liquor by using a
ceramic membrane, and then adding
activated carbon powder for adsorption; and (4) carrying out primary compression,
desalination and concentration on the material through a
nanofiltration membrane, removing residual
monovalent ions through an
electrodialysis device, and further concentrating through the
nanofiltration membrane to obtain the
fructose disodium phosphate solution. According to the method provided by the invention, a
route of low-pressure
nanofiltration preliminary compression-
electrodialysis desalination-high-pressure nanofiltration concentration is adopted in a rear-section
desalination and concentration stage, so that the purposes of separation and purification are achieved, the treatment speed is high, the operation cost is low, and industrial and large-scale production is easy to realize.