In the container A (Fig. 30) is placed 1500 g. of crushed nutmegs (Note
1) moistened with ether (Note
2). A is a
3-l. inverted aspirator bottle connected by a 3-mm. glass tube to the
efficient condenser C, and by 3-mm. tubing, one end of which is provided with a
Soxhlet thimble to the
2-l. round-bottomed flask B. Flask B is connected by 3-mm. tubing of 75-cm. length to C. In B are placed
500 cc. of ether and a few chips of clay plate to prevent superheating. B is then heated on a steam cone so that the ether boils rapidly enough to reach the condenser C and to flow back through A.
Fig. 30.
The extraction with
ether is continued until the ether leaving the insoluble solid is entirely colorless. This requires twenty-four to seventy-two hours, according to the state of subdivision of the nutmegs and the rate at which the
ether is passed through. The ethereal solution is then freed of a small quantity of entrained insoluble matter by filtering through a folded paper. This filtration may advantageously be completed in the type of extractor described on
p. 375. The clear solution is now entirely freed from ether by distillation on the
water bath. The residue weighs 640–690 g. On cooling it sets to a mass of crystals of
trimyristin which is filtered with suction (Note
3) and washed with
225 cc. of cold 95 per cent ethyl alcohol in small portions. The product is now recrystallized from
3.5 l. of 95 per cent ethyl alcohol; it is stirred mechanically during cooling since the
trimyristin tends to separate as an oil at the outset (Note
4). The crystallized
trimyristin is then filtered off by suction and washed with
350-400 cc. of 95 per cent alcohol in small portions. The crystals, which are colorless and practically odorless, melt at
54–55°. The yield is
330–364 g.