发明名称 |
Distillative freezing process for separating volatile mixtures |
摘要 |
The distillative freezing process disclosed is useful in separating a mixture containing at least two volatile components, denoted respectively as A-component and B-component, by simultaneously vaporizing the two components from the mixture under a sufficiently reduced pressure to simultaneously crystallize B-component. The vapor mixture obtained is brought to a condensed state either by a simple condensation operation or a condensation-desublimation operation without being substantially pressurized. The process may be continued to completely eliminate the liquid phase and bring the mixture into the two phase solid-vapor region. Then, the solid phase is no longer contaminated by the adhering liquid phase and gives a high purity B-component on melting. The process is particularly useful in separating mixtures containing close boiling components, such as styrene-ethyl benzene mixtures, p-xylene-m-xylene mixtures and ethylene-ethane mixtures. The process can therefore be used in producing high purity monomers for the plastic industries and high purity chemicals for other industries.
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申请公布号 |
US4378984(A) |
申请公布日期 |
1983.04.05 |
申请号 |
US19810296130 |
申请日期 |
1981.08.25 |
申请人 |
CHENG, CHEN-YEN;CHENG, SING-WANG |
发明人 |
CHENG, CHEN-YEN;CHENG, SING-WANG |
分类号 |
B01D7/02;B01D9/04;(IPC1-7):F25J3/00 |
主分类号 |
B01D7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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