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US 10,899,692 B2Granted
Purification method and production method of difluoromethyl-1, 2, 2, 2-tetrafluoroethyl ether
AssigneeCentral Glass Company, Limited
InventorsEri Nishizawa, Shinya Akiba
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Abstract
A purification method of desflurane (difluoromethyl-1,2,2,2-tetrafluoroethyl ether of the formula (1)) includes bringing a mixture containing desflurane and a trihalomethane into contact with a base in the presence of a phase transfer catalyst, thereby decomposing the trihalomethane. By this method, only the trihalometane contained as a by-product in the desflurane is decomposed without causing decomposition of the desflurane, whereby the desflurane is obtained with high purity.
Claims8
A purification method of difluoromethyl-1,2,2,2-tetrafluoroethyl ether, comprising:
- bringing a mixture containing difluoromethyl-1,2,2,2-tetrafluoroethyl ether of the formula (1) and a trihalomethane into contact with a base in the presence of water and a phase transfer catalyst, thereby decomposing the trihalomethane
Dependencies are inferred from the claim text.