申请人:Laine Richard M.
公开号:US20160304540A1
公开(公告)日:2016-10-20
The direct depolymerization of biogenic and other high surface area silica sources uses both simple and hindered diols to produce alkoxysilanes in one or two steps that can be separated and purified directly from the reaction mixture by distillation, extraction or filtration followed by solution modification and distillation or extraction. The alkoxysilanes can take the form of spirosiloxanes or simple alkoxysilanes or oligomers thereof. Thereafter they can be treated with acid to produce colloidal or precipitated silica or aerosolized and combusted to provide fumed silica without the intervention of SiCl
4
.
生物源和其他高表面积硅源的直接解聚使用简单和受阻二醇,在一到两步中产生烷氧基硅烷,可以通过蒸馏、萃取或过滤从反应混合物中直接分离和纯化,随后通过溶液改性和蒸馏或萃取,可以形成螺环硅氧烷、简单烷氧基硅烷或其寡聚体。然后,它们可以经过酸处理产生胶体或沉淀硅,或者雾化和燃烧以提供烟雾二氧化硅,而不需要SiCl4的干预。