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1. (WO2017037176) PROCESS TO PREPARE PARAFFINS AND WAXES

Pub. No.:    WO/2017/037176    International Application No.:    PCT/EP2016/070616
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Sep 02 01:59:59 CEST 2016
IPC: C10G 2/00
C10G 73/44
C10G 45/00
C10G 45/02
C10G 65/04
Applicants: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
SHELL OIL COMPANY
Inventors: BEZEMER, Gerrit, Leendert
BOERRIGTER, Harold
TAN, Hai, Ming
Title: PROCESS TO PREPARE PARAFFINS AND WAXES
Abstract:
The present invention relates to a process to prepare paraffins and waxes from a gaseous feed stream comprising hydrogen and carbon monoxide in a Fischer-Tropsch reactor comprising a fixes bed of reduced Fischer-Tropsch catalyst that comprises cobalt as catalytically active metal, said process at least comprises the following steps : (a) adding to the gaseous feed stream a nitrogen- containing compound such that the nitrogen-containing compound is present in the gaseous feed stream in a concentration of up to 10 ppmV to obtain a mixture, wherein the nitrogen-containing compound is a compound selected from ammonia, HCN, NO, amines, organic cyanides (nitriles), and a heterocyclic compound containing at least one nitrogen atom as ring member of a heterocyclic ring; (b) feeding the mixture of step (a) to the Fischer- Tropsch reactor to obtain a Fischer-Tropsch product comprising paraffins having from 5 to 300 carbon atoms; (c) subjecting the Fischer-Tropsch product of step (b) to a hydrogenation step, thereby obtaining hydrogenated fraction comprising 5 to 300 carbon atoms; (d) separating the hydrogenated Fischer-Tropsch product stream of step (c), thereby obtaining at least a fraction comprising 5 to 9 carbon atoms, a fraction comprising 10 to 17 carbon atoms and a 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.