20, 5 West and Feliciano: Extraction of Copra Cake 515 
TABLE 4.—Extraction of expeller and hydraulic copra cakes with solvents. 
[Six-hour period; Soxhlet method] 
Solvents. er ps 
Per cent. | Per cent. 
BNE a. 5c aise ntiincvonnie pues omen Rion pmadieamec en 13.50 7.00 
Garbols tettiichloride 26020005) 802: Ge ee ees 13.56} 7.27 
PONLENG ooo 532 aS Le ee es eee ie 13.50 7.19 
Wonton xsi ss sa aaa eee Se ge ae a ee 15. 04 9.04 
IDIOM sco oS 8S ae ee ee 15. 80 10.17 
meat mletinol (aheolute) 2552 a Fe i 26. 55 22, 25 
aithyl aleoho! (96 Her cent) 222257) Sie as i es 29. 18 25. 36 
MERCH YT AlcoWiol. 6555.05 25 Fay a ee ea ee ie er Sere 32. 66 27.91 
As shown by the figures in Table 4, ether, carbon tetrachloride, 
and benzene give about 7 per cent extraction with hydraulic 
cake and about 13.5 per cent with expeller cake. For both the 
expeller and the hydraulic cakes the percentage extraction with 
acetone is slightly higher than with chloroform, while with the 
alcohols there is a considerable increase. The figures given 
in Table 4 indicate that the extraction of expeller and hydraulic 
cakes with the same solvents give similar results. 
NONFATTY MATERIAL IN COPRA CAKE 
As previously stated copra cake contains not only coconut oil 
but also other substances, such as crude fiber, protein, and non- 
fatty material. The figures given in Tables 3 and 4 show 
that the percentage extraction with methyl alcohol is consider- 
ably greater than with carbon tetrachloride, which indicates that 
methyl alcohol dissolves not only the oil from copra cake but 
also a considerable quantity of nonfatty material. The non- 
fatty material may, therefore, be obtained by first treating the 
copra cake with carbon tetrachloride which dissolves out the 
oil and then extracting the oil-free cake with methyl alcohol. 
As we thought that data on the nonfatty material might, 
perhaps, be of some interest we carried out these experiments. 
The extraction with carbon tetrachloride was made with the 
Soxhlet apparatus, using 10-gram samples and extracting about 
eight hours. Each sample was then filtered and dried, after 
which it was extracted with methyl alcohol. The extractions 
with methyl] alcohol were combined, filtered, and most of the al- 
cohol eliminated by distillation. The small quantity of alcohol 
remaining in the residue was then distilled out with partial 
vacuum. The nonfatty material was very thick and sticky and 
