Process for producing dihydrocarvone geometric isomers
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United States of America Patent
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Oct 20, 1981
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N/A
app pub date -
Jan 7, 1980
filing date -
Jan 7, 1980
priority date (Note) -
Expired
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Abstract
Cis- and trans-limonene oxides can be separated effectively one from the other by either fractional distillation or by substantially selectively rearranging with acid catalysis at mild temperature said cis-isomer into trans-dihydrocarvone. The distillatively-separated limonene oxide isomers or the remaining unreacted trans-limonene oxide isomer then is available for discrete conversion into a corresponding dihydrocarvone isomer with minimal equilibration by further acid-catalyzed rearranging at mild temperature.
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