连续超临界干燥气凝胶颗粒的方法

文档序号:722598 发布日期:2021-04-16 浏览:19次 >En<

阅读说明:本技术 连续超临界干燥气凝胶颗粒的方法 (Method for continuous supercritical drying of aerogel particles ) 是由 S·莫瓦海德 W·勒尔斯贝格 D·温里克 M·弗力可 R·苏布拉马尼亚姆 I·斯米尔诺瓦 于 2019-09-12 设计创作,主要内容包括:本发明涉及用于干燥凝胶颗粒的方法,特别是用于制备气凝胶的方法,所述方法包括:提供包含凝胶颗粒(P1)和溶剂(LM)的悬浮液;将所述悬浮液注入二氧化碳以逆流方式流过的塔中;并将干燥的气凝胶颗粒从塔中分离出,将所述悬浮液在塔的顶部区域中注入,并将干燥的气凝胶颗粒在塔的下部区域中分离出,并且其中设定塔中的压力和温度以使二氧化碳和溶剂的混合物为几乎超临界或超临界。所述气凝胶颗粒既可以通过排放容器又可以通过连续膨胀而排出。本发明还涉及根据所述方法可获得或获得的气凝胶颗粒,以及根据本发明的气凝胶颗粒的用途,用于医学和药物应用,作为添加剂或载体材料用于食品添加剂,作为催化剂载体,用于化妆品、卫生、洗涤和清洁应用,用于生产传感器,用于隔热或作为芯材用于VIP。(The present invention relates to a method for drying gel particles, in particular for preparing aerogels, comprising: providing a suspension comprising gel particles (P1) and a solvent (LM); injecting the suspension into a column through which carbon dioxide flows in countercurrent; and separating the dried aerogel particles from the tower, injecting the suspension in a top region of the tower, and separating the dried aerogel particles in a lower region of the tower, and wherein the pressure and temperature in the tower are set such that the mixture of carbon dioxide and solvent is nearly supercritical or supercritical. The aerogel particles can be discharged both through the discharge vessel and through successive expansions. The invention also relates to aerogel particles obtainable or obtained according to the method, and to the use of the aerogel particles according to the invention, for medical and pharmaceutical applications, as an additive or carrier material for food additives, as a catalyst carrier, in cosmetic, hygiene, washing and cleaning applications, for producing sensors, for thermal insulation or as a core material for VIP.)

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