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1. WO2016107860 - PROCÉDÉ POUR PRÉPARER UNE CIRE DE PARAFFINE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

C L A I M S

1. A paraffin wax having a congealing point according to ASTM D938 of at least 75°C and a Saybolt colour

according to ASTM D156 of at least 25 cm.

2. A paraffin wax according to claim 1, having a

congealing point according to ASTM D938 in the range of from 75 to 85°C.

3. A paraffin wax according to claim 1 or 2, having a congealing point according to ASTM D938 of at least 80°C. 4. A paraffin wax according to any one of claims 1 to 3, having a Saybolt colour according to ASTM D156 of at least 30 cm.

5. A paraffin wax according to any one of claims 1 to 4, having an oil content according to ASTM D721 of less than 0.5 wt.%, preferably less than 0.45 wt . %

6. A paraffin wax according to any one of claims 1 to 5, wherein the paraffin wax is a Fischer-Tropsch derived paraffin wax.

7. Process to prepare a paraffin wax according to claim 6, 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 18 to 300 carbon atoms of step (b) to a hydrogenation step, thereby obtaining a hydrogenated fraction comprising 18 to 300 carbon atoms;

(d) separating the hydrogenated fraction comprising 18 to 300 carbon atoms of step (c) , 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;

(e) separating the heavy wax of step (d) to obtain a distillate wax fraction having a congealing point of at least 75°C, preferably of at least 80°C;

(f) hydrofinishing the distillate wax fraction of step

(e) thereby obtaining a hydrofinished wax fraction having a congealing point of at least 75°C, preferably of at least 80°C.

8. Process according to claim 7, wherein the heavy wax of step is separated in step (e) by short path distillation at a pressure between 0.05 mbar and 0.5 mbar, preferably between 0.1 and 0.3 mbar.