Micron-sized high-purity quartz sand and preparation process thereof

• Main Authors: HU JUNZHONG, YANG YI, ZHU JIHONG
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2024
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention belongs to the technical field of quartz sand, and discloses micron-sized high-purity quartz sand and a preparation process thereof. The preparation process comprises the following steps: 1) uniformly mixing ammonia water, deionized water, a beta-dicarbonyl compound, an alcohol surfactant and quaternary ammonium base to obtain a mixed solution; 2) slowly dropwise adding alkoxy silane into the mixed solution at a hydrolysis temperature to obtain sol; 3) heating the sol to remove alcohol until gel is formed, stopping heating, and naturally cooling and aging; and 4) freeze-drying the aged gel, and roasting to obtain the micron-sized high-purity quartz sand. According to the preparation method, alkoxy silane is used as a raw material, preparation of micron-sized high-purity quartz sand is realized through introduction of an auxiliary agent and control of process conditions, and the micron-sized high-purity quartz sand with the particle size of 30-600 microns and the specific surface area of 1t is ob