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公开(公告)号:US5763708A
公开(公告)日:1998-06-09
申请号:US530649
申请日:1995-09-20
CPC分类号: C07C17/206
摘要: The present invention provides a vapor phase process for the production of difluoromethane, HFC-32. The process of this invention provides for the preparation of HFC-32 by a process that exhibits both good product yield and selectivity.
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公开(公告)号:US5654494A
公开(公告)日:1997-08-05
申请号:US516669
申请日:1995-08-18
申请人: Hsueh Sung Tung , Paul Gene Clemmer , Gustavo Cerri , Yuon Chiu , Stanley Michael Jaskot , Nemesio Rogelio Viso , Addison Miles Smith , Jeffrey Warren McKown , Jay Philip Friedenson
发明人: Hsueh Sung Tung , Paul Gene Clemmer , Gustavo Cerri , Yuon Chiu , Stanley Michael Jaskot , Nemesio Rogelio Viso , Addison Miles Smith , Jeffrey Warren McKown , Jay Philip Friedenson
IPC分类号: B01J23/26 , C07B61/00 , C07C17/10 , C07C17/20 , C07C17/21 , C07C17/269 , C07C17/383 , C07C19/08 , C07C17/08
CPC分类号: C07C19/08 , C07C17/10 , C07C17/206 , C07C17/21 , C07C17/269 , C07C17/383
摘要: This invention relates to a process for producing 1,1,1,2-tetrafluoroethane (HFC-134a). The process reacts, 1,1,1-trifluoro-2-chloroethane (HCFC-133a) and hydrogen fluoride in a first reactor. The product resulting from the first reaction step is brought to a second reactor together with trichloroethylene and hydrogen fluoride. The second reaction is conducted at a higher temperature than the first reactor. Optionally, HCl is removed prior to removal of the crude HFC-134a product. Unreacted HCFC-133a, trichloroethylene and hydrogen fluoride may be recycled back to the first reactor.
摘要翻译: 本发明涉及一种生产1,1,1,2-四氟乙烷(HFC-134a)的方法。 该方法在第一反应器中使1,1,1-三氟-2-氯乙烷(HCFC-133a)和氟化氢反应。 将由第一反应步骤得到的产物与三氯乙烯和氟化氢一起送至第二反应器。 第二反应在比第一反应器更高的温度下进行。 任选地,在除去粗HFC-134a产物之前除去HCl。 未反应的HCFC-133a,三氯乙烯和氟化氢可循环回第一反应器。
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公开(公告)号:US06844474B1
公开(公告)日:2005-01-18
申请号:US08959748
申请日:1997-10-28
IPC分类号: B01J23/26 , C07B61/00 , C07C17/20 , C07C17/383 , C07C19/08 , C07C17/00 , C07C17/158 , C07C17/38
CPC分类号: C07C17/206 , C07C19/08
摘要: The present invention provides a vapor phase process for the production of difluoromethane, HFC-32. The process of this invention provides for the preparation of HFC-32 by a process that exhibits both good product yield and selectivity.
摘要翻译: 本发明提供用于生产二氟甲烷HFC-32的气相方法。 本发明的方法提供通过显示出良好的产物收率和选择性的方法制备HFC-32。
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公开(公告)号:US06365580B1
公开(公告)日:2002-04-02
申请号:US09425150
申请日:1999-10-21
IPC分类号: C07C1908
CPC分类号: C07C17/206 , C07C19/08
摘要: The present invention provides a vapor phase process for the production of difluoromethane, HFC-32. The process of this invention provides for the preparation of HFC-32 by a process that exhibits both good product yield and selectivity.
摘要翻译: 本发明提供用于生产二氟甲烷HFC-32的气相方法。 本发明的方法提供通过显示出良好的产物收率和选择性的方法制备HFC-32。
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