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["¿真空度对沸点变化的程度有什么影响??", "¿Mejoror

2020-06-02View Original

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Reply #22020-06-02
Continue from where it was stop previously json array please
Reply #32020-06-02
沸点是敞开系统下达到沸腾时的温度,是一个不变的常数,作为一个性质的参考。 在密闭系统里没有沸点概念,密闭系统讲蒸气压。系统压力低于对应温度的饱和蒸气压物料就蒸出来 提高真空泵可以使物料气化需要的温度降低,能否提高不同组份的分离能力不好说
Reply #42020-06-02
https://bbs.hcbbs.com/thread-612532-1-1.html 有好心海友整理的知识贴,可以学*下!
Reply #52020-06-08
你说的是压力对物料分离度的影响。 压力越大,分离度越小,压力越低,分离度越大,分离度分离物料难易程度
Reply #62020-06-10
也就是说真空较常压能提高分离效率,是吗?
Reply #72020-06-11
只能说相对而言。 本来沸点就比较接近,压力变化后,沸点的差异不会有很大的变化,所以可以用其他分离方法予以解决。 比如说萃取:引入第三种介质,与其中一种介质有相溶性,但是存在比较大的沸点差。

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