发明名称 |
A METHOD OF INCREASING CERTAIN ISOMERIC RATIOS IN CHLORINATING SUBSTITUTED BENZENES |
摘要 |
Disclosed is a method of increasing the percentage of certain isomers made when di or tri-substituted benzenes are chlorinated in the presence of a Friedel-Crafts catalyst. The use of about 0.001 to about 1 wt.% a cocatalyst during chlorination alters the isomeric ratio of the product mixture. In particular, the percentage of the 2,5-isomer is increased when said substituted benzene is ortho or meta-substituted, the percentage of the 3,4-isomer is increased when said substituted benzene is para-substituted, and the percentage of the 2,4,5-isomer is increased when said substituted benzene is 2,4-disubstituted, 3,4-disubstituted, or 2,5-disubstituted.
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申请公布号 |
WO0130727(A1) |
申请公布日期 |
2001.05.03 |
申请号 |
WO2000GB01928 |
申请日期 |
2000.05.19 |
申请人 |
OCCIDENTAL CHEMICAL CORPORATION;STEPHENS, DINAH |
发明人 |
LAGERWALL, DEAN, R.;KHANDARE, PRAVIN, M.;CHEN, HANG-CHANG, BOBBY;LECHNER, MARK, F. |
分类号 |
C07C17/12;C07C25/02;(IPC1-7):C07C17/12 |
主分类号 |
C07C17/12 |
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