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US 9,169,169 B2Granted
Lowering nitrogen-containing Lewis bases in molecular sieve oligomerisation
AssigneeExxonMobil Chemical Patents Inc.
InventorsJohn Stephen Godsmark, George Marie Karel Mathys, Hubertus Joseph Beckers, Charles Morris Yarbrough, Stephen Harold Brown, Yeo-Meng Lim
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Abstract
A process for the oligomerization of olefins includes treating, e.g., water washing, an olefin-containing hydrocarbon stream to lower the concentration of an organic nitrogen-containing Lewis base contained therein until the treated hydrocarbon stream is substantially free of the Lewis base; and subsequently contacting the treated hydrocarbon stream with a molecular sieve catalyst to produce a product including at least one oligomer.
Claims22
A process for the oligomerisation of olefins comprising:
- (a) treating an olefin-containing hydrocarbon stream comprising an organic nitrogen-containing Lewis base to thereby lower the concentration of the organic nitrogen-containing Lewis base in the olefin-containing hydrocarbon stream;
- and
- (b) subsequently contacting the treated olefin-containing hydrocarbon stream with a molecular sieve oligomerisation catalyst to produce a product comprising at least one oligomer;
- wherein said Lewis base is selected from the group consisting of at least one of acetonitrile, propionitrile, dimethylformamide, N-methyl-pyrrolidone, and mixtures thereof;
- wherein the treating consists essentially of an extraction step of water washing;
- and
- wherein the treated olefin-containing hydrocarbon has a concentration of the Lewis base from 0.05 ppm to 1 ppm by weight based on the total treated olefin-containing hydrocarbon stream.
4 more elements
Dependencies are inferred from the claim text.