A twin-screw extruder for oil extraction: II. Alcohol extraction of oleic sunflower seeds

被引：11
|
作者：
Dufaure, C [1 ]
Mouloungui, Z [1 ]
Rigal, L [1 ]
机构：
[1] Ecole Natl Super Chim, Lab Chim AgroInd, UA INRA 31A1010, F-31077 Toulouse 4, France
来源：
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY | 1999年 / 76卷 / 09期
关键词：
acidic alcohol extraction; acid value; 2-ethylhexanol; high-oleic sunflower seeds; oil extraction yields; oil phosphorus content; oleic oil; phosphoric acid; twin-screw extruder;
D O I：
10.1007/s11746-999-0207-z
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Our work is about the extraction of sunflower seed oil in a twin-screw extruder with or without the injection of 2-ethylhexanol and acidified 2-ethylhexanol. 2-Ethylhexanol is mixed with phosphoric acid. The oil recovery is increased to 90% by the co-injection of acidified alcohol. Mixing phosphoric acid with the alcohol enhances the lability of the oily spherosomes. Its addition increases the destruction of the membranes enveloping the lipid-containing organelles to release the oil more easily. Phosphoric acid exhibits an extracting and a degumming role. The best oil-quality was obtained at a low extraction temperature (80 degrees C), when 88% of the oil was removed. Alter alcoholic distillation, the oil exhibited a total acid value (mineral acidity plus organic acidity) of 4 mg KOH/g of oil and an organic phosphorus content below 30 ppm.
引用
收藏
页码：1081 / 1086
页数：6
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