Olefin production process
AssigneePhillips Petroleum Company
InventorsWarren M. Ewert, William M. Woodard, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
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Abstract
A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.
Claims49
A process for making an olefin trimerization product comprising:
- a) introducing an olefin feedstock and hydrogen into a reactor;
- b) separately introducing a catalyst system comprising a chromium source, a pyrrole-containing compound, and a metal alkyl into the reactor, thereby contacting the olefin feedstock and the catalyst system in the reactor;
- maintaining the olefin feedstock and the catalyst system under conditions to produce a reactor effluent comprising the olefin trimerization product and reactor products;
- and
- separating the olefin trimerization product from the reactor effluent.
In the selective conversion of olefins to olefin trimerization products a process comprising:
- a) introducing a feedstock comprising olefins and hydrogen into a reactor;
- b) separately introducing a catalyst system comprising a chromium source, a pyrrole-containing compound, and a metal alkyl into the reactor, thereby contacting the feedstock and the catalyst system in the reactor;
- c) maintaining the feedstock and catalyst system in the reactor under conditions to produce a reactor effluent comprising unreacted olefins, olefin trimerization products, catalyst, and heavies;
- d) transferring reactor effluent comprising unreacted olefins, olefin trimerization products, and heavies from the reactor to a first separator wherein catalyst and heavies are separated from the reactor effluent;
- e) removing from the first separator a first effluent stream comprising at least catalyst and heavies;
- and
- f) removing from the first separator a second effluent stream comprising at least unreacted olefins.
In the selective conversion of olefins to olefin trimerization products, a process comprising:
- a) introducing a feed stock comprising olefins and hydrogen into a reactor;
- b) separately introducing a stream comprising diluent and a catalyst system comprising a chromium source, a pyrrole-containing compound, and a metal alkyl into the reactor, thereby contacting diluent, feedstock, and catalyst system in the reactor;
- c) maintaining the feedstock and catalyst system in the reactor under conditions to produce a reactor effluent comprising diluent, unreacted olefins, olefin trimerization products, catalyst, and heavies;
- d) transferring reactor effluent comprising diluent, unreacted olefins, olefin trimerization products, and heavies from the reactor to a first separator wherein the reactor effluent is separated into 1) catalyst and heavies, 2) diluent, and 3) unreacted olefin and trimerization products;
- e) removing from the first separator a predominantly catalyst and heavies stream;
- f) removing from the first separator a predominantly diluent stream;
- and
- g) removing from the first separator a predominantly unreacted olefin and trimerization products stream.
Dependencies are inferred from the claim text.