Process to prepare a paraffin wax

摘要

The present invention provides a process to prepare paraffins and waxes, the process at least comprising the following steps:
(a) providing a Fischer-Tropsch product stream comprising paraffins having from 10 to 300 carbon atoms;
(b) separating the Fischer-Tropsch product stream of step (a), thereby obtaining at least a fraction comprising 10 to 17 carbon atoms and a fraction comprising 18 to 300 carbon atoms;
(c) subjecting the fraction comprising 10 to 17 carbon atoms of step (b) to a hydrogenation step, thereby obtaining hydrogenated paraffins comprising 10 to 17 carbon atoms;
(d) subjecting the fraction comprising 18 to 300 carbon atoms of step (b) to a hydrogenation step, thereby obtaining a hydrogenated fraction comprising 18 to 300 carbon atoms;
(e) separating the hydrogenated fraction comprising 18 to 300 carbon atoms of step (d), thereby obtaining one or more first light waxes having a congealing point in the range of 30 to 75°C and a second heavy wax having a congealing point in the range of 75 to 120°C;
f) hydrofinishing one or more wax fractions having a congealing point in the range of 30 to 75°C of step (e) thereby obtaining one or more hydrofinished wax fractions having a congealing point in the range of 30 to 75°C.