20, 5 West and Feliciano: Extraction of Copra Cake 517 
perhaps, give some very interesting results, and we expect to 
continue this work when time permits. 
SUMMARY 
The extraction of expeller copra cake with different solvents 
has been studied for various intervals of time. The results 
show that ether, carbon tetrachloride, and benzene give approxi- 
mately the same percentage extraction. It appears, therefore, 
that either carbon tetrachloride or benzene could be used for the 
routine estimation of the oil remaining in copra cake. 
Chloroform, acetone, and petroleum ether appear to dissolve 
not only oil but also small quantities of nonfatty substances from 
expeller copra cake while ethyl and methyl alcohols dissolve a 
considerable quantity. These solvents would, therefore, be un- 
desirable for routine analysis showing the percentage of oil 
extracted from copra cake. 
The extraction of hydraulic cake with different solvents gave 
results similar to those obtained with expeller cake. 
By extracting expeller copra cake with carbon tetrachloride 
and afterwards extracting the oil-free cake with methyl alcohol 
the nonfatty material was obtained. Analysis of the nonfatty 
material showed that it had a high acid and saponification value 
and also contained a small percentage of nitrogen. The nitrogen 
may, perhaps, be present as amino acids or possibly a small 
portion of it as protein. 
