LUBRICANT OIL COMPOSITIONS CONTAINING A HEAVY BASIC OIL OBTAINED BY FISCHER-TROPSH SYNTHESIS AND ALCILATED AROMATIC BASIC OIL

摘要

1. A lubricating composition containing a particularly heavy base oil of Fischer-Tropsch synthesis (FT) and an alkylated aromatic mixed feed, in which a particularly heavy base oil of FT has a kinematic viscosity at 100 ° C in the range from 19 to 35 mm / s. 2. The lubricating composition according to claim 1, wherein the especially heavy FT base oil has a lower boiling range (T5) of at least 420 ° C and an upper boiling range (T80) of at least 600 ° C. 3. The lubricating composition according to claim 1 or 2, wherein the especially heavy FT base oil contains at least 95 wt.% C30 + hydrocarbon molecules and at least 75 wt.% C35 + hydrocarbon molecules. 4. The lubricating composition according to claim 1 or 2, wherein the especially heavy FT base oil has a cloud point in the range of + 60 ° C to + 5 ° C and a pour point of -6 ° C or lower. 5. The lubricating composition according to claim 1 or 2, wherein the especially heavy FT base oil is a residual base oil. 6. The lubricating composition according to paragraph 5, in which a particularly heavy FT base oil is obtained from a Fischer-Tropsch synthesis product, in which there is at least 55 wt.% Compounds containing at least 30 carbon atoms, and in which the mass ratio of compounds having at at least 60 carbon atoms, to compounds having at least 30, but less than 60 carbon atoms, is at least 0.4.7. The lubricating composition according to paragraph 1, 2 or 6, in which the especially heavy FT base oil is cloudy in the sense that it does not meet the clear and light standard (ASTM D4176-04) under normal conditions. The lubricating composition according to paragraph 1, 2 or 6, in which the alkylated aromatic mixed feed contains an alkylated aromatic hydrocarbon -