发明名称 METHOD FOR PREPARING SURFACE-MODIFIED NANOSILICON DIOXIDE FROM RICE HULLS
摘要 A method for preparing surface-modified nano silicon dioxide from rice hulls. The method includes: 1) pretreating rice hulls using a treating gas containing CO2 to remove metal ions, impurities, and dusts, and desiccating and grinding the rice hulls; 2) submerging the rice hulls into a dilute solution of phosphoric acid, boric acid, hydrochloric acid, formic acid, acetic acid, propionic acid, butyric acid, or a strong-acid-weak-base salt for between 4 and 8 hrs, controlling the immersion temperature not to exceed 10° C., leaching a resulting mixture, removing a filtrate, and desiccating the rice hulls; and 3) calcining the rice hulls in the absence of oxygen at a temperature of between 300 and 450° C.
申请公布号 US2015119595(A1) 申请公布日期 2015.04.30
申请号 US201414569771 申请日期 2014.12.14
申请人 Wuhan Kaidi Engineering Technology Research Institute Co., Ltd. 发明人 TAO Leiming;CHEN Yilong;ZHANG Yanfeng;XUE Yongjie
分类号 C07F7/02 主分类号 C07F7/02
代理机构 代理人
主权项 1. A method for preparing surface-modified nano silicon dioxide from rice hulls, the method comprising: 1) pretreating rice hulls using a treating gas containing CO2 to remove metal ions, impurities, and dusts, and desiccating and grinding the rice hulls; 2) submerging the rice hulls into a dilute solution of phosphoric acid, boric acid, hydrochloric acid, formic acid, acetic acid, propionic acid, butyric acid, or a strong-acid-weak-base salt for between 4 and 8 hrs, controlling an immersion temperature not to exceed 10° C., leaching a resulting mixture, removing a filtrate, and desiccating the rice hulls; and 3) calcining the rice hulls in the absence of oxygen at a temperature of between 300 and 450° C., whereby obtaining a surface-modified nano silicon dioxide.
地址 Wuhan CN