2 Industrial Plant Oil Extraction
87
Table 2.15 Physicochemical property of Swida wilsoniana oil and analysis of the major fatty acids
Program
Index
Unit
Result
Property
Acid value
mg KOH/g
1.27
Peroxide value
mmol/Kg
7.6
Color (25.4)
–
R = 40.0, Y = 15.0, B =
15.0
Iodine
g I 2 /100 g
104.48
Saponification value Mg KOH/g 199.04
Composition of fatty acids C 18 H 32 O 2
%
39.15
C 18 H 34 O 2
%
29.83
C 16 H 32 O 2
%
21.79
C 18 H 30 O 2
%
2.59
C 18 H 36 O 2
%
1.61
Others
%
5.03
Through theoretical calculation and the one-dimensional pressing device, the conditions of the cold pressing process and performances of fruits from Swida wilsoniana
had been studied. Swida wilsoniana fruits dried through natural weather are more
suitable for direct pressing, for that guarantees a higher oil quality. The volume of
fruits fed into pressing device had little effect on pressures of oil squeezed out, fruits
crushed and critical compression, and the value of those pressures were 55.7, 71.5,
and 80 MPa individually. At the critical pressure of 80 MPa and the compression
ratio of 3.14, residual oil of meal is 6.5%.
Swida wilsoniana oil is a kind of high-quality woody oil, which is rich in unsaturated fatty acid, of nearly 72%, altogether 29.83% oleic acid, 39.15% linoleic acid,
and 2.59% linolenic acid.
2.7 Summary
The oil industry has evolved from small operations to larger processing facilities
over the past decades. And the individual operation must include the impact of the
other operations. This chapter is concerned with industrial plant oil extraction from
oilseeds. It includes a brief account of the principle of oil extraction, storage and
preparation of oilseeds, mechanical extraction, solvent extraction, and oil refining.
Different purposes of use between edible plant oil and industrial plant oil have led to
the different technology, crafts, and equipments during each production process. The
industrial plant oil extraction has a history, but it did not form a systematic theory
and mechanism. So far, the industrial plant oil extraction is similar to edible plant oil.
For example, the solvent extraction process consists of the unit operations of solvent
extraction, meal desolventizing, meal drying and cooling, miscella distillation, and
87
Table 2.15 Physicochemical property of Swida wilsoniana oil and analysis of the major fatty acids
Program
Index
Unit
Result
Property
Acid value
mg KOH/g
1.27
Peroxide value
mmol/Kg
7.6
Color (25.4)
–
R = 40.0, Y = 15.0, B =
15.0
Iodine
g I 2 /100 g
104.48
Saponification value Mg KOH/g 199.04
Composition of fatty acids C 18 H 32 O 2
%
39.15
C 18 H 34 O 2
%
29.83
C 16 H 32 O 2
%
21.79
C 18 H 30 O 2
%
2.59
C 18 H 36 O 2
%
1.61
Others
%
5.03
Through theoretical calculation and the one-dimensional pressing device, the conditions of the cold pressing process and performances of fruits from Swida wilsoniana
had been studied. Swida wilsoniana fruits dried through natural weather are more
suitable for direct pressing, for that guarantees a higher oil quality. The volume of
fruits fed into pressing device had little effect on pressures of oil squeezed out, fruits
crushed and critical compression, and the value of those pressures were 55.7, 71.5,
and 80 MPa individually. At the critical pressure of 80 MPa and the compression
ratio of 3.14, residual oil of meal is 6.5%.
Swida wilsoniana oil is a kind of high-quality woody oil, which is rich in unsaturated fatty acid, of nearly 72%, altogether 29.83% oleic acid, 39.15% linoleic acid,
and 2.59% linolenic acid.
2.7 Summary
The oil industry has evolved from small operations to larger processing facilities
over the past decades. And the individual operation must include the impact of the
other operations. This chapter is concerned with industrial plant oil extraction from
oilseeds. It includes a brief account of the principle of oil extraction, storage and
preparation of oilseeds, mechanical extraction, solvent extraction, and oil refining.
Different purposes of use between edible plant oil and industrial plant oil have led to
the different technology, crafts, and equipments during each production process. The
industrial plant oil extraction has a history, but it did not form a systematic theory
and mechanism. So far, the industrial plant oil extraction is similar to edible plant oil.
For example, the solvent extraction process consists of the unit operations of solvent
extraction, meal desolventizing, meal drying and cooling, miscella distillation, and