玉米胚芽饼中植酸钠的制取及纯化工艺研究

Extraction and purification of phytic acid dodecasodium from defatted corn germ cake

以脱脂玉米胚芽饼为原料,通过稀植酸浸提、离子交换树脂吸附、解吸、浓缩、精制等过程得到植酸钠。实验结果表明,植酸提取的最佳工艺参数为pH2.2、提取温度45℃、提取时间1.5h、料液比1∶8、植酸提取得率为74.73%。离子交换树脂吸附解吸的最佳工艺参数为上样液浓度2mg/mL,上样液流速1mL/min,操作温度45℃,pH约为2,洗脱液NaOH浓度0.6mol/L。

The phytic acid dodecasodium was extracted with self-extraction,anion exchange adsorption,elution,refinement and concentration from defatted corn germ cake. The results indicated that the optimal process conditions of extraction：temperature 45℃,extraction time 1. 5h,ratio of liquid to raw material 8∶ 1 and pH about 2. 2,the observed value of phytic acid yield was 74. 73%. The yield was the optimal process conditions of anion -exchange：absorption solvent concentration 2mg/mL,adsorption solvent flow rate 1. 0mL/min,operation temperature 45℃ and pH about 2,NaOH elution solvent concentration 0. 6mol/L.