Phytic acid was prepared from rice chaff using following steps : immersesing seed-bran with acetic acid and heating up , depositing with milk of lime , acidifing phytin with lactic acid , basifying and wiping off ion with ion-exchange resin , decoloring using active carbon .

采用醋酸解离并结合加热使植酸从种皮的复合盐中释放、石灰乳沉淀、乳酸酸化植酸钙、碱解再用离子交换脱无机离子，结合流程采用活性炭脱色的方法制备植酸。