100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
0.
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
50
40
30
20
10
0
Pour Points °F
−10
−20
−30
−40
−50
A S T M
5 0 %
T e m p
3 0 0
° F
4 0 0
° F
6 0 0
° F
7 0 0
° F
5 0 0
° F
Fig. 12 Pour point blending index
Table 7 Calculating pour points of a cut
Composition
ASTM dist
Pour point
Components
BPSD
Fraction
50 %
F
Factor
Pour point
Index
Factor
F
Gas oil
2,000
0.33
500
85.8
À5
5.8
1.9
Waxy dist
4,000
0.67
700
249
30
12.7
8.5
Total
6,000
1.00
634
334
22
10.4
The pour point of the blend is read from Fig. 12 where the ASTM 50 % point is 634
F and the index is
10.4. In this case the pour point is 22
F
30
D.S.J. Jones
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
0.
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
50
40
30
20
10
0
Pour Points °F
−10
−20
−30
−40
−50
A S T M
5 0 %
T e m p
3 0 0
° F
4 0 0
° F
6 0 0
° F
7 0 0
° F
5 0 0
° F
Fig. 12 Pour point blending index
Table 7 Calculating pour points of a cut
Composition
ASTM dist
Pour point
Components
BPSD
Fraction
50 %
F
Factor
Pour point
Index
Factor
F
Gas oil
2,000
0.33
500
85.8
À5
5.8
1.9
Waxy dist
4,000
0.67
700
249
30
12.7
8.5
Total
6,000
1.00
634
334
22
10.4
The pour point of the blend is read from Fig. 12 where the ASTM 50 % point is 634
F and the index is
10.4. In this case the pour point is 22
F
30
D.S.J. Jones