UNITED STATES DEPARTMENT OF AGRICULTURE 
$Uk BULLETIN No. 1054 iirifc 
^ J >--; ||g? Contribution from the Bureau of Plant Industry ? ^fc>^|^ 
WM. A. TAYLOR, Chief 
jvJv^Mu 
Washington, D. C. 
PROFESSIONAL PAPER 
March 11, 1922 
COMPARISON OF CORN OILS OBTAINED BY EX- 
PELLER AND BENZOL EXTRACTION METHODS. 
By A. F. Sievees, Chemical Biologist, Office of Drug, Poisonous, and Oil Plant 
Investigations. 
CONTENTS. 
Page. 
Introduction . 1 
Character and composition of corn 
oil ' 2 
Review of previous investigations-. 2 
Experimental work 8 
Method of selecting material 8 
Benzcl extraction of corn germs 
and oil cake 8 
Page. 
Experimental work — Continued. 
Removal of the solvent 9 
Appearance and character of the 
crude oils 10 
Refining the oils 11 
Comparison of the finished oils 14 
Summary 16 
Literature cited 17 
INTRODUCTION. 
The production of oil from corn germs resulting from the manu- 
facture of hominy, starch, glucose, and sirup has become a well- 
established industry in the United States. The methods of obtain- 
ing the oil from corn germs, also the economic relation of its 
production to the manufacture of corn products in general, the 
utilization of the oil, and its future in the vegetable-oil industry 
of this country have been described in a bulletin of the Department 
of Agriculture (Jfi) } Later, a technical study was made of methods 
for refining corn oil for edible purposes,. and a second bulletin was 
published giving the cost of refining, together with plans and esti- 
mated cost for a refinery (H). 
The present paper deals with still another phase of the corn-oil 
industry, that of extracting the oil by means of a solvent. With few 
1 The serial numbers (italic) in parentheses refer to " Literature cited 
this bulletin. 
82276—22 1 
the end of 
