发明授权
US5773671A Process for purifying 1,1-dichloro-2,2,2-trifluoroethane and
1-chloro-1,2,2,2-tetrafluoroethane
失效
1,1-二氯-2,2,2-三氟乙烷和1-氯-1,2,2,2-四氟乙烷的纯化方法
- 专利标题： Process for purifying 1,1-dichloro-2,2,2-trifluoroethane and 1-chloro-1,2,2,2-tetrafluoroethane
- 专利标题（中）： 1,1-二氯-2,2,2-三氟乙烷和1-氯-1,2,2,2-四氟乙烷的纯化方法
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申请号： US768338申请日： 1996-12-17
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公开(公告)号： US5773671A公开(公告)日： 1998-06-30
- 发明人: Hsueh Sung Tung
- 申请人： Hsueh Sung Tung
- 申请人地址： NJ Morristown
- 专利权人： Allied Signal
- 当前专利权人： Allied Signal
- 当前专利权人地址： NJ Morristown
- 主分类号： B01J23/26
- IPC分类号： B01J23/26 ; C07C17/395 ; C07C17/38
摘要：
The invention relates to a novel process for purifying HCFC-123 and HCFC-124 comprising: (a) reacting a fluorination reaction product comprising HCFC-123 and HCFC-123a and/or HCFC-124 and HCFC-124a wherein at least one of said HCFC-123a or HCFC-124a is present in an amount not less than 5 weight percent relative to HCFC-123 or HCFC-124 respectively in the product with anhydrous HF in the presence of a fluorination catalyst under conditions such that the amount of HCFC-123a and/or HCFC-124a relative to HCFC-123 and/or HCFC-124 respectively in the product is reduced to less than 5 weight percent. The pure product (i.e., HCFC-123 or HCFC-124) may be used in a variety of applications including solvent, refrigerant, sterilant gas and blowing agent applications.
公开/授权文献
- US5220635A Data sink having high efficiency in received data processing 公开/授权日：1993-06-15
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