Title:
PROCESS FOR PRODUCING DIFLUOROMETHANE
Document Type and Number:
WIPO Patent Application WO/1998/008790
Kind Code:
A1
Abstract:
A process for refining difluoromethane by removing water which is contained in difluoromethane and has been believed to be difficult to remove, which process comprises distilling difluoromethane containing water to recover a distillate comprising difluoromethane and bottoms comprising a mixture of water-containing difluoromethane with chlorofluoromethane and/or dichloromethane. The bottoms are recycled to the reaction steps to be reused together with the feedstock.
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Inventors:
TSUDA TAKEHIDE (JP)
SHIBANUMA TAKASHI (JP)
SHIBANUMA TAKASHI (JP)
Application Number:
PCT/JP1997/002963
Publication Date:
March 05, 1998
Filing Date:
August 26, 1997
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
TSUDA TAKEHIDE (JP)
SHIBANUMA TAKASHI (JP)
TSUDA TAKEHIDE (JP)
SHIBANUMA TAKASHI (JP)
International Classes:
C07C17/38; C07C19/08; (IPC1-7): C07C19/08; C07C17/20; C07C17/383; B01J27/10
Foreign References:
JPH08183748A | 1996-07-16 | |||
JPS423004B1 | ||||
JPH08143487A | 1996-06-04 | |||
JPS59231030A | 1984-12-25 |
Other References:
See also references of EP 0931784A4
Attorney, Agent or Firm:
Aoyama, Tamotsu (IMP Building 3-7, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 540, JP)
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