Oligomerization of olefins
AssigneePhillips Petroleum Company
InventorBruce B. Randolph
Life of this patent
Estimating the term…
Abstract
A process for oligomerizing at least one heavy olefin having at least 5 carbon atoms per molecule in the presence of at least one co-fed light olefin having less than 5 carbon atoms per molecule is disclosed. The presence of the at least one co-fed light olefin results in increased C6=(C6 olefin) conversion (if present as one of the at least one heavy olefins), increased weight % of C11+ hydrocarbons in the C9+ material of the product and increased cetane of the C9+ material of the product as compared to the oligomerization of the at least one heavy olefin without the co-fed at least one light olefin.
Claims20
A method for oligomerizing heavy olefins comprising:
- (a) introducing a heavy hydrocarbon stream comprising at least one heavy olefin having in the range of from 5 to 6 carbon atoms per molecule into a reaction zone containing an oligomerization catalyst and operating under reaction conditions for oligomerizing heavy olefins;
- (b) introducing a light olefin stream comprising at least one light olefin having less than 5 carbon atoms per molecule at a rate of introduction into said reaction zone as a co-feed with said heavy hydrocarbon stream;
- (c) withdrawing from said reaction zone a reactor effluent comprising oligomers having at least 9 carbon atoms per molecule;
- and
- (d) wherein the rate of introduction of said light olefin stream in step (b) is sufficient such that the weight % of C11+ hydrocarbons contained in the oligomers having at least 9 carbon atoms per molecule, based on the total weight of the oligomers, of said reactor effluent of step (c) exceeds the weight % of C11+ hydrocarbons contained in the oligomers having at least 9 carbon atoms per molecule, based on the total weight of the oligomers, of a reaction product produced by a method identical to the method of step (a) without the introduction of the light olefin stream, including the reaction conditions of step (a).
A method for oligomerizing heavy olefins comprising:
- (a) introducing a heavy hydrocarbon stream comprising at least one heavy olefin having in the range of from 5 to 6 carbon atoms per molecule into a reaction zone containing an oligomerization catalyst and operating under reaction conditions for oligomerizing heavy olefins;
- (b) introducing a light olefin stream comprising at least one light olefin having less than 5 carbon atoms per molecule at a rate of introduction into said reaction zone as a co-feed with said heavy hydrocarbon stream;
- (c) withdrawing from said reaction zone a reactor effluent comprising oligomers having at least 9 carbon atoms per molecule;
- (d) recovering said oligomers from said reactor effluent;
- and
- (e) wherein the rate of introduction of said light olefin stream in step (b) is sufficient such that the weight % of C11+ hydrocarbons contained in said oligomers, based on the total weight of said oligomers, of said reactor effluent of step (c) exceeds the weight % of C11+ hydrocarbons contained in the oligomers of a reaction product produced by a method identical to the method of step (a) without the introduction of the light olefin stream, including the reaction conditions of step (a).
Dependencies are inferred from the claim text.