Catalyst injection system for an olefin polymerization reactor

Patent metadata

Field	Value
Publication number	US-11066493-B2
Application number	US-201916451585-A
Country	US
Kind code	B2
Filing date	Jun 25, 2019
Priority date	Jun 26, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

This disclosure relates to a method and an apparatus for the delivery of a multi-component olefin polymerization catalyst to a polymerization reactor. The components soluble in a first solvent are delivered under pressure along with that solvent in a first delivery conduit. The components that are insoluble in the first solvent but are soluble in a second solvent are delivered under pressure in a second delivery conduit which is arranged coaxially with and disposed within the first conduit, such that the inner conduit and outer conduit terminate at a common catalyst component mixing conduit which extends into the polymerization reactor and in which the catalyst components mix to form an active polymerization catalyst.

First claim

What is claimed is:

1. A method for delivering a multi-component olefin polymerization catalyst to a polymerization reactor, the method comprising:
feeding at least one catalyst component soluble in a first solvent to a catalyst component mixing conduit via a first catalyst component delivery conduit;
feeding at least one catalyst component soluble in a second solvent to the catalyst component mixing conduit via a second catalyst component delivery conduit which is disposed within the first catalyst component delivery conduit;
wherein the at least one catalyst component soluble in the first solvent and the at least one catalyst component soluble in the second solvent come into contact with one another within the catalyst component mixing conduit before being expelled from the catalyst component mixing conduit into the polymerization reactor.

2. The method of claim 1 , wherein the at least one catalyst component soluble in the first solvent is insoluble in the second solvent.

3. The method of claim 1 , wherein the at least one catalyst component soluble in the second solvent is insoluble in the first solvent.

4. The method of claim 1 , wherein the at least one catalyst component soluble in the first solvent is insoluble in the second solvent and the at least one catalyst component soluble in the second solvent is insoluble in the first solvent.

5. The method of claim 1 , wherein the at least one catalyst component soluble in the first solvent comprises: an organometallic catalyst compound and an ionic activator.

6. The method of claim 1 , wherein the at least one catalyst component soluble in the second solvent comprises: an alkylaluminoxane co-catalyst, and optionally a hindered phenol.

7. The method of claim 1 , wherein the at least one catalyst component soluble in the second solvent comprises: an organometallic catalyst compound and an ionic activator.

8. The method of claim 1 , wherein the at least one catalyst component soluble in the first solvent comprises: an alkylaluminoxane co-catalyst, and optionally a hindered phenol.

9. The method of claim 5 , wherein the first solvent is an aromatic hydrocarbon.

10. The method of claim 7 , wherein the second solvent is an aromatic hydrocarbon.

11. The method of claim 9 , wherein the aromatic hydrocarbon is one or more than one xylene isomer.

12. The method of claim 9 , wherein the aromatic hydrocarbon is ortho-xylene.

13. The method of claim 6 , wherein the second solvent comprises an alkane.

14. The method of claim 8 , wherein the first solvent comprises an alkane.

15. The method of claim 13 , wherein the alkane is one or more than one methylpentane isomer.

16. The method of claim 13 , wherein the alkane is 2-methylpentane.

17. The method of claim 5 , wherein the organometallic catalyst compound is a phosphinimine catalyst compound.

18. The method of claim 5 , wherein the ionic activator is trityl borate, Ph 3 CB(C 6 F 5 ) 4 .

19. The method of claim 6 , wherein the alkylaluminoxane co-catalyst is methylaluminoxane.

20. The method of claim 6 , wherein the optional hindered phenol is 2,6-di-tert-butyl-p-ethylphenol.

21. The method of claim 1 wherein the multi-component olefin polymerization catalyst comprises: an organometallic catalyst compound, an ionic activator, an alkylaluminoxane co-catalyst, and optionally a hindered phenol.

22. The method of claim 1 , wherein the polymerization reactor is a solution phase polymerization reactor.

23. A catalyst injection apparatus for the delivery of a multi-component olefin polymerization catalyst to a polymerization reactor, the apparatus comprising:
a first catalyst component delivery conduit;
a second catalyst component delivery conduit which is disposed within the first catalyst component delivery conduit; and
an open-ended catalyst component mixing conduit which terminates within the polymerization reactor;
the first and second catalyst component delivery conduits each being open-ended and co-terminating at the catalyst component mixing conduit;
wherein at least one catalyst component soluble in a first solvent is delivered under pressure along with the first solvent to the catalyst component mixing conduit via the first catalyst component delivery conduit, and at least one catalyst component soluble in a second solvent is delivered under pressure along with the second solvent to the catalyst component mixing conduit via the second catalyst component delivery conduit, whereby the at least one catalyst component soluble in the first solvent comes into contact with the at least one catalyst component soluble in the second solvent within the catalyst component mixing conduit before being expelled from the catalyst component mixing conduit into the polymerization reactor.

24. The apparatus of claim 23 , wherein the second catalyst component delivery conduit is arranged substantially coaxially within the first catalyst component delivery conduit so that the open ends of the first and second catalyst component delivery conduits co-terminate in a substantially concentric arrangement at the catalyst component mixing conduit.

25. The apparatus of claim 24 , wherein the catalyst component mixing conduit comprises a conical section in fluid communication with an open ended tubular section which terminates within the polymerization reactor, the conical section tapering inwardly to meet the open ended tubular section, wherein the conical section receives the at least one catalyst component soluble in the first solvent from the first catalyst component delivery conduit and the at least one catalyst component soluble in the second solvent from the second catalyst component delivery conduit.

26. The apparatus of claim 25 , wherein the first catalyst component delivery conduit and the second catalyst component delivery conduit are in fluid communication with at least one first catalyst component holding tank, and at least one second catalyst component holding tank, respectively.

27. The apparatus of claim 25 , wherein the polymerization reactor is a stirred tank reactor.

28. The apparatus of claim 27 , wherein the stirred tank reactor comprises a bottom wall, a top wall and a continuous side wall extending upwardly from the bottom wall to the top wall.

29. The apparatus of claim 28 , wherein the catalyst component mixing conduit extends through the bottom wall of the stirred tank reactor.

30. A method for delivering a multi-component olefin polymerization catalyst to a polymerization reactor, the method comprising:
adding a catalyst injection apparatus to a polymerization reactor, the catalyst injection apparatus comprising a first open ended catalyst component delivery conduit, a second open ended catalyst component delivery conduit arranged coaxially with and disposed within the first catalyst component delivery conduit, the open ends of the first and second catalyst component delivery conduit co-terminating in concentric arrangement at an open-ended catalyst component mixing conduit which terminates within the polymerization reactor;
feeding at least one catalyst component soluble in a first solvent to the catalyst component mixing conduit via the first catalyst component delivery conduit;
feeding at least one catalyst component soluble in a second solvent to the catalyst component mixing conduit via the second catalyst component delive

Assignees

• Nova Chem Int Sa

Inventors

• Brown Stephen
• Clavelle Eric
• Harding Geoffrey

Classifications

• C08F10/00 Primary

  Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C08F2/01

  characterised by special features of the polymerisation apparatus used · CPC title

• C08F4/6592

  containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring · CPC title

• B01J2208/00769

  Details of feeding or discharging · CPC title

• B01J4/02

  for feeding measured {, i.e. prescribed} quantities of reagents · CPC title