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1. IN201747026694 - PROCESS TO PREPARE A PARAFFIN WAX

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

[ EN ]
CLAIMS 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 comprisingparaffins having from 10 to 300 carbon atoms;(b) separating the Fischer-Tropsch product stream of step(a), thereby obtaining at least a fraction comprising 10to 17 carbon atoms and a fraction comprising 18 to 300 carbon atoms;(c) subjecting the fraction comprising 18 to 300 carbonatoms of step (b) to a hydrogenation step, therebyobtaining a hydrogenated fraction comprising 18 to 300carbon atoms; (d) separating the hydrogenated fraction comprising 18 to300 carbon atoms of step (c), thereby obtaining one ormore first light waxes having a congealing point in therange of 30 to 75°C and a second heavy wax having acongealing 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 havinga congealing point of at least 75°C, preferably of atleast 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.