From: Yuehui Zhou (yuehuizhou$##$hotmail.com)
Date: Sat May 24 2003 - 02:16:55 EDT
Phosphonium salts can be used as the PTCs that meet your need.
You can chose one that is water soluble so it can be washed away from your
product. Some phosphoium bromides have the m.p in the range you mentioned.
Y. Zhou
>
>hi everybody,
>Has anyone utilized the following PTC in conjunction with
>cyclohexane
>tetrabutylammonium iodide , CAS No.: 311-28-4
>
>The product being insoluble is removed as cake after filtration and the PTC
>also being insoluble in cyclohexane is removed with product.
>PTC is also insoluble in water.
>Any ideas or references to effectively separate the PTC would be
>appreciable.
>Or
>Could anyone suggest a PTC with m.p.above 140°C that can be used with
>cyclohexane.
>
>Regards,
>Ch.Bharathi,
>Hyderabad, India
>
>
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