Invention Grant
- Patent Title: Synthesis of difluoromethane
- Patent Title (中): 二氟甲烷的合成
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Application No.: US663977Application Date: 1996-06-14
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Publication No.: US5900514APublication Date: 1999-05-04
- Inventor: Benoit Requieme , Eric Lacroix , Andre Lantz
- Applicant: Benoit Requieme , Eric Lacroix , Andre Lantz
- Applicant Address: FRX Paris La Defense
- Assignee: Elf Atochem S.A.
- Current Assignee: Elf Atochem S.A.
- Current Assignee Address: FRX Paris La Defense
- Priority: FRX9507705 19950627
- Main IPC: B01J23/86
- IPC: B01J23/86 ; C07B61/00 ; C07C17/158 ; C07C17/20 ; C07C19/08
Abstract:
The invention relates to the manufacture of difluoromethane by catalytic gas-phase fluorination of methylene chloride.The operation is carried out in the presence of oxygen at a temperature of between 330 and 450.degree. C. and with a bulk or supported chromium catalyst.
Public/Granted literature
- US5197128A Modular interface Public/Granted day:1993-03-23
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