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 volume of a Fischer-Tropsch product stream;
- (b) separating the volume of the Fischer-Tropsch product stream to form a first gaseous hydrocarbon stream and a first liquid hydrocarbon stream;
- (c) cooling and separating the first gaseous hydrocarbon stream in two or more steps to obtain a second liquid hydrocarbon stream and a third liquid hydrocarbon stream, wherein the second liquid hydrocarbon stream comprises heavier carbon atoms molecules than the third liquid hydrocarbon stream;
- (d) subjecting at least one of the second liquid hydrocarbon stream and the third liquid hydrocarbon stream to a hydrogenation step, to form a hydrogenated liquid hydrocarbon stream;
- (e) separating the hydrogenated liquid hydrocarbon stream using one or more atmospheric distillation(s), into the following fractions:
- 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.