Separation and extraction method of nano spherical silica powder

• Main Author: QIU JIAHAO
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; NANOTECHNOLOGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention relates to the field of silicon dioxide preparation, in particular to a separation and extraction method of nano spherical silica powder. The preparation method comprises the following steps: (1) dissolving a spherical silica powder containing 1-50wt% of nano silica powder particles in an organic solvent, and performing full stirring and mixing; and (2) carrying out centrifugal separation by adopting a high-speed centrifugal machine to separate out nano spherical silicon dioxide particles. The spherical silicon dioxide prepared by the method is uniform in granularity and good in dispersity. 本发明涉及二氧化硅制备领域，具体涉及纳米球形硅微粉分离提取方法。制备方法包括（1）将含有纳米二氧化硅微粉颗粒重量比例为1-50wt%的球形二氧化硅微粉溶解于有机溶剂中，充分搅拌混合；（2）采用高速离心机进行离心分离，分离出纳米球形二氧化硅颗粒。本发明方法制备的球形二氧化硅粒度均匀、分散性好。