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1.发明授权
公开(公告)号：US3817842A
公开(公告)日：1974-06-18
申请号：US35474373
申请日：1973-04-26
Applicant: PCR
Inventor： REED T
CPC classification number: C07C17/386 , C07C19/14
Abstract: A PROCESS FOR PURIFYING BROMOCHLOROTRIFLUOROETHANE IS DISCLOSED, WHEREIN 1,2-DICHLOROHEXAFLUOROCYCLOBUTANE IMPURITY IS REMOVED FROM THE BROMOCHLOROTRIFLUOROETHANE BY FORMING A MAXIMUM BOILING AZEOTROPE OF THE BROMOCHLOROTRIFLUOROETHANE WITH ACETONE OR TETRAHYDROFURAN AND THEREAFTER DISTILLING, UNDER REFLUXING CONDITIONS, THE RESULTING AZEOTROPIC COMPOSITION UNTIL THE RESIDUE CONTAINS LESS THAN 0.01% OF THE DIMER IMPURITY. PROCESS OF THE PRESENT INVENTION ALLOWS THE PRODUCTION OF HALOTHANE OF IMPROVED PURITY, SUITABLE FOR USE AS AN ANESTHETIC.
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