FISCHER-TROPSCH GASOIL FRACTION

Abstract

The present invention provides a Fischer-Tropsch gasoil fraction having an initial boiling point of at least 165 C. and a final boiling point of at most 220 C. In another aspect the present invention provides a cleaning composition and the use of a Fischer-Tropsch gasoil fraction according to the invention.

Claims

1. A Fischer-Tropsch derived gasoil fraction having an initial boiling point of at least 170 C. and a final boiling point of at most 220 C.

2. A Fischer-Tropsch derived gasoil fraction according to claim 1, having an initial boiling point of at least 180 C.

3. A Fischer-Tropsch derived gasoil fraction according to claim 1, having a final boiling point of at most 218 C.

4. A Fischer-Tropsch derived gasoil fraction according to claim 1, having a kinematic viscosity at 25 C. according to ASTM D445 of from 0.7 to 1.3 cSt.

5. A Fischer-Tropsch derived gasoil fraction according to claim 1, having a flash point according to ASTM D93 of at least 45 C.

6. A Fischer-Tropsch derived gasoil fraction according to claim 1, containing no more than 4 wt % of naphthenic paraffins, based on the Fischer-Tropsch derived gasoil fraction.

7. A Fischer-Tropsch derived gasoil fraction according to claim 1, containing isoparaffins and normal paraffins in a weight ratio of isoparaffins over normal paraffins in the range of 2 to 3.

8. A cleaning composition comprising a Fischer-Tropsch derived gasoil fraction according to claim 1.

9. A cleaning composition according to claim 8, wherein the cleaning composition is a dry cleaning composition.

10. A cleaning composition according to claim 8, wherein the cleaning composition is a metal cleaning composition.

11-12. (canceled)

Description

EXAMPLES

Example 1

[0040] Preparation of a Fischer-Tropsch Gasoil Fraction Having an Initial Boiling Point of 175 C. and a Final Boiling Point of 208 C.

[0041] A Fischer-Tropsch product was prepared in a process similar to the process as described in Example VII of WO-A-9934917, using the catalyst of Example III of WO-A-9934917. The C.sub.5+ fraction (liquid at ambient conditions) of the product thus obtained was continuously fed to a hydrocracking step (step (a)). The C.sub.5+ fraction contained about 60 wt % C.sub.30+ product. The ratio C.sub.60+/C.sub.30+ was about 0.55. In the hydrocracking step the fraction was contacted with a hydrocracking catalyst of Example 1 of EP-A-532118. The effluent of step (a) was continuously distilled under vacuum to give light products, fuels and a residue R boiling from 370 C. and above. The conversion of the product boiling above 370 C. into product boiling below 370 C. was between 45 and 55 wt %. The residue R was recycled to step (a). The conditions in the hydrocracking step (a) were: a fresh feed Weight Hourly Space Velocity (WHSV) of 0.8 kg/l.h, recycle feed WHSV of 0.4 kg/l.h, hydrogen gas rate=1000 Nl/kg, total pressure=40 bar, and a reactor temperature in the range of from 330 C. to 340 C.

[0042] The obtained fuels fraction (C5.sup.-370 C.) was continuously distilled to give Fischer-Tropsch gasoil fraction having an initial boiling point of 175 C. and a final boiling point of 208 C. and an approximate gasoil fraction yield as shown in Table 1.

[0043] The physical properties are given in Table 2.

TABLE-US-00001 TABLE 1 Fischer-Tropsch gasoil fraction Yield 12 ASTM D2892 (wt %)

TABLE-US-00002 TABLE 2 Fischer-Tropsch gasoil fraction Kinematic viscosity at 25 C. 1.08 According to ASTM D445 [mm.sup.2/s] content of aromatics <200 According to SMS 2728 [mg/kg] content of n-paraffins 27 According to GCxGC - internal testing methodology [wt %] content of isoparaffins 70 According to GCxGC - internal testing methodology [wt %] Density at 15 C. 723 According ASTM D4052 [kg/m.sup.3] T10 vol. % boiling point 186 According to ASTM D86 [ C.] T90 vol. % boiling point 200 According to ASTM D86 [ C.] Smoke point >50 [mm] Carbon number range paraffins 7-14 Flash point 60 According to ASTM D93 [ C.] content of monomethyl isoparaffins 54 According to GCxGC - internal testing methodology [wt %, based on total isoparaffins] Visual Appearance Clear and bright