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公开(公告)号:US5495056A
公开(公告)日:1996-02-27
申请号:US355306
申请日:1994-12-12
IPC分类号: B01J27/12 , B01J27/125 , B01J27/132 , C07B61/00 , C07C17/361 , C07C19/08
CPC分类号: C07C17/361
摘要: A process for the production of hydrofluorocarbons, in particular hydrofluoroalkanes such as difluoromethane, which comprises contacting an .alpha.-fluoro-ether, in particular a fluorinated dialkyl ether such as bis(fluoromethyl)ether in the liquid phase with a Lewis acid such as a fluoride of Nb, Sb, B, Ta, Al or Ti.
摘要翻译: 一种用于生产氢氟烃,特别是诸如二氟甲烷的氢氟烷烃的方法,其包括使α-氟醚,特别是氟化二烷基醚如液体中的双(氟甲基)醚与路易斯酸如氟化物 的Nb,Sb,B,Ta,Al或Ti。
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公开(公告)号:US5637776A
公开(公告)日:1997-06-10
申请号:US565716
申请日:1995-11-30
CPC分类号: C07C43/123 , C07C41/01 , C07C41/50
摘要: A process for the production of a hydro(halo)fluorocarbon which comprises heating an .alpha.-fluoroether in the vapour phase at elevated temperature. .alpha.-fluoroethers are obtained by reacting a non-enolisable aldehyde with hydrogen fluoride to form an intermediate and reacting the intermediate with an alcohol or a halogenating agent. Novel .alpha.-fluoroethers are also provided.
摘要翻译: 一种制备氢(卤代)碳氟化合物的方法,其包括在升高的温度下在气相中加热α-氟醚。 通过使非烯醇化的醛与氟化氢反应以形成中间体并使中间体与醇或卤化剂反应来获得α-氟醚。 还提供了新的α-氟醚。
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公开(公告)号:US5463139A
公开(公告)日:1995-10-31
申请号:US268659
申请日:1994-06-29
申请人: Jane L. Butcher , Thomas A. Ryan , Leslie Burgess
发明人: Jane L. Butcher , Thomas A. Ryan , Leslie Burgess
IPC分类号: C07C19/08 , B01J21/02 , B01J23/26 , B01J23/72 , B01J23/755 , C07B61/00 , C07C17/00 , C07C17/18 , C07C17/361 , C07C41/01 , C07C41/06 , C07C41/40 , C07C43/12 , C07C41/00
CPC分类号: C07C43/123 , C07C17/361 , C07C41/01
摘要: A composition comprising bis(fluoromethyl)ether and less than an equimolar amount of water, a process for the production of the composition comprising contacting formaldehyde with hydrogen fluoride and separating at least some of the by-product water from bis(fluoromethyl)ether, and use of the composition for the production of difluoromethane.
摘要翻译: 一种组合物,其包含双(氟甲基)醚且小于等摩尔量的水,该组合物的制备方法包括使甲醛与氟化氢接触并将至少一些副产物水从双(氟甲基)醚中分离出来,以及 使用组合物生产二氟甲烷。
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公开(公告)号:US5623091A
公开(公告)日:1997-04-22
申请号:US523194
申请日:1995-09-05
申请人: Jane L. Butcher , Thomas A. Ryan , Leslie Burgess
发明人: Jane L. Butcher , Thomas A. Ryan , Leslie Burgess
IPC分类号: C07C19/08 , B01J21/02 , B01J23/26 , B01J23/72 , B01J23/755 , C07B61/00 , C07C17/00 , C07C17/18 , C07C17/361 , C07C41/01 , C07C41/06 , C07C41/40 , C07C43/12 , C07C41/22 , C07C41/42
CPC分类号: C07C43/123 , C07C17/361 , C07C41/01
摘要: A composition comprising bis(fluoromethyl)ether and less than an equimolar amount of water, a process for the production of the composition comprising contacting formaldehyde with hydrogen fluoride and separating at least some of the by-product water from bis(fluoromethyl)ether, and use of the composition for the production of difluoromethane.
摘要翻译: 一种组合物,其包含双(氟甲基)醚且小于等摩尔量的水,该组合物的制备方法包括使甲醛与氟化氢接触并将至少一些副产物水从双(氟甲基)醚中分离出来,以及 使用组合物生产二氟甲烷。
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公开(公告)号:US5504263A
公开(公告)日:1996-04-02
申请号:US442295
申请日:1995-05-16
CPC分类号: C07C17/361 , C07C41/01 , C07C43/123
摘要: A process for the production of a hydro(halo)fluorocarbon which comprises heating an .alpha.-fluoroether in the vapor phase at elevated temperature. .alpha.-fluoroethers are obtained by reacting a non-enolizable aldehyde with hydrogen fluoride to form an intermediate and reacting the intermediate with an alcohol or a halogenating agent. Novel .alpha.-fluoroethers are also provided.
摘要翻译: 一种制备氢(卤代)碳氟化合物的方法,其包括在升高的温度下在气相中加热α-氟醚。 通过使不可烯化的醛与氟化氢反应形成中间体并使中间体与醇或卤化剂反应来获得α-氟醚。 还提供了新的α-氟醚。
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公开(公告)号:US5696308A
公开(公告)日:1997-12-09
申请号:US565715
申请日:1995-11-30
CPC分类号: C07C17/361 , C07C41/01 , C07C43/123
摘要: A process for the production of a hydro(halo)fluorocarbon which comprises heating an .alpha.-fluoroether in the vapor phase at elevated temperature. .alpha.-fluoroethers are obtained by reacting a non-enolisable aldehyde with hydrogen fluoride to form an intermediate and reacting the intermediate with an alcohol or a halogenating agent. Novel .alpha.-fluoroethers are also provided.
摘要翻译: 一种制备氢(卤代)碳氟化合物的方法,其包括在升高的温度下在气相中加热α-氟醚。 通过使非烯醇化的醛与氟化氢反应以形成中间体并使中间体与醇或卤化剂反应来获得α-氟醚。 还提供了新的α-氟醚。
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公开(公告)号:US5756868A
公开(公告)日:1998-05-26
申请号:US545483
申请日:1995-10-19
IPC分类号: B01J27/12 , B01J27/125 , B01J27/132 , C07B61/00 , C07C17/361 , C07C19/08
CPC分类号: C07C17/361
摘要: A process for the production of hydrofluorocarbons, in particular hydrofluoroalkanes such as difluoromethane, which comprises contacting an .alpha.-fluoro-ether, in particular a fluorinated dialkyl ether such as bis(fluoromethyl)ether in the liquid phase with a Lewis acid such as a fluoride of Nb, Sb, B, Ta, Al or Ti.
摘要翻译: 一种用于生产氢氟烃,特别是诸如二氟甲烷的氢氟烷烃的方法,其包括使α-氟醚,特别是氟化二烷基醚如液体中的双(氟甲基)醚与路易斯酸如氟化物 的Nb,Sb,B,Ta,Al或Ti。
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公开(公告)号:US5723684A
公开(公告)日:1998-03-03
申请号:US651652
申请日:1996-05-21
IPC分类号: C07C19/08 , B01J21/02 , B01J23/26 , B01J23/72 , B01J23/755 , C07B61/00 , C07C17/00 , C07C17/18 , C07C17/361 , C07C41/01 , C07C41/06 , C07C41/40 , C07C43/12
CPC分类号: C07C43/123 , C07C17/361 , C07C41/01
摘要: A composition comprising bis(fluoromethyl)ether and less than an equimolar amount of water, a process for the production of the composition comprising contacting formaldehyde with hydrogen fluoride and separating at least some of the by-product water from bis(fluoromethyl)ether, and use of the composition for the production of difluoromethane.
摘要翻译: 一种组合物,其包含双(氟甲基)醚且小于等摩尔量的水,该组合物的制备方法包括使甲醛与氟化氢接触并将至少一些副产物水从双(氟甲基)醚中分离出来,以及 使用组合物生产二氟甲烷。
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公开(公告)号:US4263458A
公开(公告)日:1981-04-21
申请号:US22595
申请日:1979-03-19
申请人: Roy D. Bowden , Leslie Burgess , Raymond J. Clark
发明人: Roy D. Bowden , Leslie Burgess , Raymond J. Clark
IPC分类号: C07C45/27 , C07C45/28 , C07C49/813
CPC分类号: C07C49/813 , C07C45/27 , C07C45/28
摘要: 4,4'-difluoro-benzophenone is prepared from 4,4'-diamino-diphenylmethane by diazotization in anhydrous or concentrated aqueous hydrogen fluoride and decomposition of the diazonium fluoride thus produced in the presence of nitrous acid or nitrite as oxidizing agent.
摘要翻译: 通过在无水或浓缩的氟化氢水溶液中重氮化,由4,4'-二氨基 - 二苯基甲烷制备4,4'-二氟 - 二苯甲酮,并在亚硝酸或亚硝酸盐作为氧化剂存在下分解由此产生的重氮氟化物。
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公开(公告)号:US5990359A
公开(公告)日:1999-11-23
申请号:US101125
申请日:1998-06-30
摘要: Process for producing Sevoflurane anaesthetic which comprises reacting hexafluoroisopropyl alcohol with essentially pure bis(fluoromethyl)ether. The bis(fluoromethyl)ether is preferably obtained by the reaction of formaldehyde with hydrogen fluoride.
摘要翻译: PCT No.PCT / GB96 / 03001 Sec。 371日期1998年6月30日第 102(e)日期1998年6月30日PCT 1996年12月6日PCT PCT。 公开号WO97 / 25303 日期1997年7月17日七氟烷麻醉剂的制备方法,其包括使六氟异丙醇与基本上纯的双(氟甲基)醚反应。 双(氟甲基)醚优选通过甲醛与氟化氢的反应获得。
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