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

页码：1081 / 1086

页数：6

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