发明名称 |
PURIFICATION OF 1,1,1,3,3-PENTAFLUOROBUTANE |
摘要 |
In the synthesis of 1,1,1,3,3-pentafluorobutane (R-365mfc), a mixture of R-365mfc and the impurity 1,1,1,3-tetrathioro-2-butene (R-1354zd) is purified and R-1354zd is removed from the mixture by contacting the mixture with 1-5 mols of chlorine for each mol of R-1354zd in the presence of ultraviolet light having a wavelength between about 300 to 400 nm which provides at least 0.02 watts-hour/kg of the mixture. The R-1354zd is reduced to below 10 wt. ppm as it is converted to 2,3-dichloro-1,1,1,3-tetrafluorobutane (R-354) or other butane containing more chlorine and having a higher boiling point than R-365mfc. The butane(s) may be spearated more easily from R-365mfc. The photochlorination is effected in a manner such that at least about 96 weight percent of the starting amount of R-365mfc is maintained in the mixture.
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申请公布号 |
WO02060845(A1) |
申请公布日期 |
2002.08.08 |
申请号 |
WO2001US48949 |
申请日期 |
2001.12.13 |
申请人 |
HONEYWELL INTERNATIONAL INC. |
发明人 |
YATES, STEPHEN, FREDERIC;TUNG, HSUEH, SUNG |
分类号 |
C07C17/383;C07C17/395;C07C19/08;(IPC1-7):C07C17/395;C07C17/04;C07C19/01 |
主分类号 |
C07C17/383 |
代理机构 |
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主权项 |
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