发明名称 |
DISTILLATION PROCESS FOR REDUCING THE CONCENTRATION OF DINITROGEN DIFLUORIDE AND DINITROGEN TETRAFLUORIDE IN NITROGEN TRIFLUORIDE |
摘要 |
Disclosed is a distillation process for reducing the concentration of impurities dinitrogen difluoride and dinitrogen tetrafluoride in nitrogen trifluoride. The process comprises: (a) distilling a mixture comprising nitrogen trifluoride and dinitrogen difluoride and/or dinitrogen tetrafluori de in a distillation column in the presence of a compound having a higher norma l boiling point than nitrogen trifluoride; (b) removing a mixture comprising dinitrogen difluoride and/or dinitrogen tetrafluoride as a sidedraw from the distillation column; (c) removing a mixture comprising the compound having a higher normal boiling point than nitrogen trifluoride from the bottom of the distillation column; and (d) removing a nitrogen trifluoride product having reduced concentration of dinitrogen difluoride and/or dinitrogen tetrafluori de from the top of the distillation column.
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申请公布号 |
CA2522211(A1) |
申请公布日期 |
2004.10.28 |
申请号 |
CA20042522211 |
申请日期 |
2004.04.08 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
MAHLER, BARRY ASHER;MILLER, RALPH NEWTON |
分类号 |
C01B21/083;(IPC1-7):C01B21/083 |
主分类号 |
C01B21/083 |
代理机构 |
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