公开(公告)号：US3992159A

公开(公告)日：1976-11-16

申请号：US589204

申请日：1975-06-23

申请人： James Windfield Mitchell

发明人： James Windfield Mitchell

IPC分类号： B01D7/00 ,  C01B15/013 ,  C01B21/16 ,  C01B33/08 ,  C01G17/04 ,  C01G23/02 ,  C01G28/00 ,  C01G41/00 ,  C07C51/42

CPC分类号： C01B25/00 ,  B01D7/00 ,  C01B15/013 ,  C01B15/0135 ,  C01B21/16 ,  C01B25/10 ,  C01B33/08 ,  C01G17/04 ,  C01G23/02 ,  C01G28/007 ,  C01G41/00 ,  C07C51/42 ,  Y10S159/05

摘要： A process is described for purifying liquids by cryogenic sublimation. This process involves solidifying the liquid by reducing the temperature and pressure to below the triple point. Purification is then carried out by direct transformation from the solid to the vapor phase. Because of increased differentials in vapor pressures at the low temperature at which the procedure is carried out, this purification process is highly efficient and is also particularly suitable for liquids that are susceptible to decomposition with ordinary purification procedures requiring elevated temperatures. The procedure is also advantageous in separating azeotropes, structurally similar compounds, as well as treating flammable, hydroscopic, corrosive and fuming compounds.

摘要翻译： 描述了通过低温升华纯化液体的方法。 该过程涉及通过将温度和压力降低到三点以下来固化液体。 然后通过从固体到气相的直接转化来进行纯化。 由于在执行该方法的低温下蒸气压差增加，因此该纯化方法是高效的，并且特别适用于易于通过需要升高温度的普通纯化方法分解的液体。 该方法在分离共沸物，结构相似的化合物以及处理易燃，吸湿，腐蚀性和发烟化合物方面也是有利的。