Method for preparing fructose magnesium diphosphate

The invention discloses a method for preparing fructose magnesium diphosphate. The method includes 1) reacting fructose with sodium dihydrogen phosphate in the presence of magnesium chloride and immobilized yeast, and purifying the reactant to obtain fructose-1,6-diphosphate; 2) preparing the fructose-1,6-diphosphate obtained in the step 1) into a water solution of the 1,6-diphosphoric acid, and adding powdery magnesium hydroxides to the water solution of the 1,6-diphosphoric acid in batches while stirring, and carrying out a reaction to obtain the fructose magnesium diphosphate, wherein the feeding amount of the fructose-1,6-diphosphate is excessive relative to the magnesium hydroxides. The product with high yield and high purity can be obtained by the method, and the method is simple inprocess and suitable for industrial production. 本发明公开了一种制备果糖二磷酸镁的方法，包括：1）使果糖、磷酸二氢钠在氯化镁和固定化酵母的存在下反应，纯化，制得果糖-1,6-二磷酸；2）将步骤1）制备的果糖-1,6-二磷酸配制成果糖-1,6-二磷酸水溶液，在搅拌条件下向果糖-1,6-二磷酸水溶液中分批次加入粉末状的氢氧化镁，反应，制成，果糖-1,6-二磷酸相对于氢氧化镁的投料量是过量的；本发明能够兼