240
Chemistry and Technology of Fuels and Oils, Vol. 39, No. 5, 2003
MANUFACTURE OF AVIATION OILS FROM HIGHER a-OLEFINS
G. A. Guseinova UDC 547.313.3.66.095.264
____________________________________________________________________________________________________
Azerbaidzhan Olefin State Scientific-Research Institute, Baku. Translated from Khimiya i Tekhnologiya
Topliv i Masel, No. 5, pp. 11 12, September October, 2003.
0009-3092/03/39040240$25.00Ó2003Plenum Publishing Corporation
Technology for manufacture of aviation oils based on oligomerization of C
8
-C
10
and C
6
-C
12
higher
a-olefincuts, cutation, and hydrogenation is described. The oils obtained have good thermooxidative
stability and viscosity-temperature and low-temperature properties.
The instability and inhomogeneity of distillation of crude oil feedstock makes it difficult to obtain
bases for aviation oils with high performance properties. Preference is thus given to synthetic bases of stable
composition. Production based on hydrogenated poly-a-olefins which are characterized by high performance
properties in a wide range of temperatures: from 50 to +150°C, is increasing each year in the world.
Due to their structure a long hydrocarbon chain with one or more branches in the middle [1],
poly-a-olefins have a high viscosity index, low solid point, and good low-temperature properties. Aviation oils
of different viscosity used in turbojet and turboprop engines must have such properties.
We developed technology for manufacturing aviation oils based on oligomerization of C
8
-C
10
and
C
6
-C
12
cuts of higher linear a-olefins obtained as a result of oligomerization of ethylene. The a-olefins were
oligomerized in a reactor consisting of pipes filled with dried aluminum chloride in the presence of a
Fig. 1. Diagram of production of aviation oils based on C
8
-C
10
and C
6
-C
12
a-olefin
cuts: 1, 2) oligomerization reactors; 3) settling tank; 4) atmospheric distillation tower;
5) heat exchanger; 6, 8, 10, 11) tanks; 7, 9) vacuum distillation towers;
12, 13) hydrogenation reactors; I) C
8
-C
10
or C
6
-C
12
a-olefins; II) solvent (hexane);
III) oligomerization product; IV) calcium hydroxide; V) steam; VI) paint thickener;
VII) water; VIII) unreacted a-olefins in reactor I; IX, X, XI) <300, 300-420, and
>400°C a-olefin oligomer cuts; XII) hydrogen; XIII) MS-8 oil; XIV) MS-20 oil.
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