Processes Utilizing Solvent Extraction
AssigneeExxonMobil Chemical Patents Inc.
InventorsGeorges M.K. Mathys, Marc P.H. Puttemans, Geraldine Tosin, Eddy T. Van Driessche, Paul Hamilton, Marcel J.G. Janssen
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Abstract
Embodiments of an invention disclosed herein relate to processes utilizing solvent extraction to remove nitrogen containing compounds and optionally other components from feedstreams of olefins and paraffins.
Claims25
A process for removing nitriles and/or pyrroles from a feedstream, the process comprising contacting at least one feedstream comprising olefins, paraffins, and at least one of a nitrile and a pyrrole with at least one solvent and removing at least a portion of the nitrile and the pyrrole from the at least one feedstream;
- wherein the process comprises a distribution coefficient expressed by the following:
- (
- D
- )
- =
- molNP
-
- /
-
- lfs
- molNP
-
- /
-
- lsol
- wherein molNP/lfs is the molar concentration of the nitrile and the pyrrole in the feedstream after extraction;
- molNP/lsol is the molar concentration of the nitrile and the pyrrole in the solvent(s) after extraction;
- and (D) is from 0.04 to 0.50;
- wherein the at least one feedstream has a liquid density (in accordance with ASTM D4052) at 15° C. of 0.94 kg/l or less;
- and
- wherein the at least one feedstream comprises at least 3.00 ppm nitrogen derived from the nitrile and/or the pyrrole before the contacting and the at least one feedstream comprises 1.50 ppm or less of nitrogen derived from the nitrile and/or the pyrrole after contacting the at least one feedstream with the at least one solvent.
A process for the oligomerization of olefins, the process comprising:
- contacting at least one feedstream comprising olefins, paraffins, and at least one of a nitrile and a pyrrole with at least one solvent and removing at least a portion of the nitrile and the pyrrole from the at least one feedstream to produce at least one treated feedstream, and subsequently contacting the at least one treated feedstream with a catalyst under oligomerization conditions to produce oligomers;
- wherein the process comprises a distribution coefficient expressed by the following:
- (
- D
- )
- =
- molNP
-
- /
-
- lfs
- molNP
-
- /
-
- lsol
- wherein molNP/lfs is the molar concentration of the nitrile and the pyrrole in the feedstream after extraction;
- molNP/lsol is the molar concentration of the nitrile and the pyrrole in the solvent after extraction;
- and (D) is from 0.04 to 0.50;
- wherein the at least one feedstream has a liquid density (in accordance with ASTM D4052) at 15° C. of 0.94 kg/l or less;
- and
- wherein the at least one feedstream comprises at least 3.00 ppm nitrogen derived from the nitrile and/or the pyrrole before the contacting and the at least one treated feedstream comprises 1.50 ppm or less of nitrogen derived from the nitrile and/or the pyrrole after contacting the at least one feedstream with the at least one solvent.
Dependencies are inferred from the claim text.