Process to prepare normal paraffins
AssigneeShell Oil Company
InventorGerrit Leendert BEZEMER
Life of this patent
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Abstract
A process for preparing normal paraffins involves separating a Fischer-Tropsch product stream to obtain first gaseous and liquid hydrocarbon streams. The first gaseous hydrocarbon stream is cooled and separated to obtain a second liquid hydrocarbon stream and a third liquid hydrocarbon stream, which are hydrogenated. The hydrogenated liquid hydrocarbon stream is separated by distillation to obtain a hydrogenated normal paraffin fraction comprising 5 to 9 carbon atoms, a hydrogenated normal paraffin fraction comprising 10 to 13 carbon atoms, a hydrogenated normal paraffin fraction comprising 14 to 18 carbon atoms, and a hydrogenated normal paraffin fraction comprising 19 to 35 carbon atoms.
Claims14
A process to prepare normal paraffins, the process comprises the steps of:
- (a) providing a Fischer-Tropsch product stream;
- (b) separating the Fischer-Tropsch product stream of step (a), thereby obtaining a first gaseous hydrocarbon stream and a first liquid hydrocarbon stream;
- (c) cooling and separating of the first gaseous hydrocarbon stream of step (b) in two or more steps to obtain a second liquid hydrocarbon stream and a third liquid hydrocarbon stream;
- (d) subjecting the second and third liquid hydrocarbon streams of step (c) to a hydrogenation step, thereby obtaining a hydrogenated liquid hydrocarbon stream;
- (e) separating the hydrogenated liquid hydrocarbon stream of step (d) by one or more atmospheric distillation(s), thereby obtaining a hydrogenated normal paraffin fraction comprising 5 to 9 carbon atoms, a hydrogenated normal paraffin fraction comprising 10 to 13 carbon atoms, a hydrogenated normal paraffin fraction comprising 14 to 18 carbon atoms, and a hydrogenated normal paraffin fraction comprising 19 to 35 carbon atoms.
Dependencies are inferred from the claim text.