| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing monofluoromethane which scarcely includes trifluoromethane from a trifluoromethane-containing monofluoromethane, wherein both cannot be efficiently separated from each other by distillation because the boiling points of them are close to each other, and which replaces distillation. <P>SOLUTION: The method for producing purified monofluoromethane includes a step to bring crude monofluoromethane containing at least trifluoromethane into contact with a trifluoromethane treatment liquid including an amide represented by general formula (1) and a base (in formula, R<SP POS="POST">1</SP>, R<SP POS="POST">2</SP>and R<SP POS="POST">3</SP>represent each independently a hydrogen atom or an alkyl group, or may be bonded to each other to form a ring wherein a ring carbon atom may be replaced by an oxygen atom, a nitrogen atom or a sulfur atom). <P>COPYRIGHT: (C)2012,JPO&INPIT |
