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发明公开
CN102653409A 一种含硅纤维状薄水铝石的制备方法 无效 - 驳回

一种含硅纤维状薄水铝石的制备方法
摘要：
本发明涉及一种含硅纤维状薄水铝石的制备方法；将偏铝酸钠固体溶于水中，配制偏铝酸钠水溶液；将水玻璃在剧烈搅拌下滴加到偏铝酸钠水溶液中；将偏铝酸钠和水玻璃混合水溶液滴加到硫酸铝溶液中；得到的悬浮液pH值控制在7～9；将得到的悬浮液转移到高压反应釜中，在160℃～250℃反应，时间为5-48小时；反应完成后将高压釜温度自然冷却至室温，得到的白色沉淀物用离心洗涤，在60～100℃下干燥得到纯的含硅纤维状薄水铝石；水玻璃与偏铝酸钠的摩尔比按氧化硅和氧化铝计为0.003～0.10；本方法在没有表面活性剂存在条件下，水热合成氧化硅含量0.05～3wt％直径为6～15纳米纤维状薄水铝石。
摘要（英）：

The invention relates to a preparation method of silicon-containing fibrous boehmite. The preparation method comprises the following steps of: dissolving sodium metaaluminate into water to prepare a sodium metaaluminate water solution; dripping sodium silicate to the sodium metaaluminate water solution under violent stirring; dripping a sodium metaaluminate and sodium silicate mixed water solution to an aluminum sulfate solution; controlling pH value of an obtained suspension to be 7-9; transferring the obtained suspension to an autoclave, and reacting for 5-48 hours at 160-250 DEG C; after reacting, naturally cooling the temperature of the autoclave to room temperature, centrifugally washing an obtained white precipitate, drying the white precipitate at 60-100 DEG C to obtain pure silicon-containing fibrous boehmite, wherein the molar ratio of sodium silicate to sodium metaaluminate is 0.003-0.10 based on silicon oxide and aluminum oxide. The fibrous boehmite with the diameter of 6-15 nm and the silicon oxide content of 0.05-3wt% is hydrothermally synthesized without a surfactant by using the preparation method.

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