Owing to the very strong camphoraceous odor of the oil, a separation
of the stearoptene suggested itself. In order to separate a solid body
which is held in solution by a volatile oil, the “freezing-out” method
is usually employed. Accordingly 100 grams of the oil were subjected
to a freezing mixture of ice and salt. A temperature of -15° C. was
attained, and flaky crystals formed throughout the oil. The crystals
were separated by being thrown on a force filter and the remaining oil
again subjected to the cold, when a second lot was obtained, which was
likewise separated. A total of 11.3 grams of crystals was separated,
corresponding to a yield of 11.3 per cent. These crystals were soft and
flaky in nature and possessed the characteristic odor of camphor.