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corvalolum -> phenobarbital(extraction)

Started by between_the_eyes, May 04, 2004, 06:07:00 PM

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between_the_eyes

May 04, 2004, 06:07:00 PM
What is the best way to extract and purify phenobarbital from corvalolum.
corvalolum is a mixture containig:
ethyl ester of a-bromo-iso-valeric acid - 2 g
phenobarbital - 2 g
peppermint oil -2 g
NaOH  -3 g
ethyl alcohol - 50-60 ml
water -         40 ml
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