High molecular weight functionalized olefin copolymer quenching agent

Patent metadata

Field	Value
Publication number	US-10654949-B2
Application number	US-201816047052-A
Country	US
Kind code	B2
Filing date	Jul 27, 2018
Priority date	Feb 22, 2018
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

This disclosure describes polymerization processes and processes for quenching polymerization reactions using reactive particulates, such as high molecular weight functionalized olefin copolymers, as quenching agents, typically in solution or bulk polymerization processes.

First claim

What is claimed is:

1. A process for producing a polymer, wherein the process comprises:
polymerizing a hydrocarbon monomer present in a solvent in the presence of a catalyst system under conditions to obtain a first effluent stream comprising a solution of the polymer and the solvent;
introducing a quenching agent into the first effluent stream to quench the polymerization reaction, wherein the quenching agent has a molecular weight (M n ) greater than about 2000 g/mol and a hydroxyl value of greater than about 10 mg KOH/g.

2. A process for quenching a polymerization reaction, wherein the process comprises:
introducing a quenching agent into a first effluent stream comprising polymer exiting a polymerization zone to quench the polymerization reaction, wherein the quenching agent has a molecular weight greater than about 2000 g/mol and a hydroxyl value of greater than about 10 mg KOH/g.

3. The process of claim 1 , further comprising:
performing a separation on the first effluent stream to produce:
a second effluent stream comprising the quenching agent; and

a recycle stream comprising the solvent, unreacted hydrocarbon monomer and optionally, the quenching agent,
wherein the second effluent stream has a higher concentration of the quenching agent than the recycle stream.

4. The process of claim 3 , wherein less than about 5.0 wppm of the quenching agent is present in the recycle stream.

5. The process of claim 3 , wherein the recycle stream does not contain quenching agent.

6. The process of claim 5 , wherein the quenching agent has a molecular weight (M n ) of greater than or equal to about 5000 g/mol and a hydroxyl value of greater than or equal to about 15 mg KOH/g.

7. The process of claim 5 , wherein the quenching agent has a molecular weight of greater than or equal to about 6000 g/mol.

8. The process of claim 5 , wherein the quenching agent has a hydroxyl value of greater than or equal to about 20 mg KOH/g.

9. The process of claim 5 , wherein the quenching agent comprises at least one functionalized olefin copolymer.

10. The process of claim 9 , wherein the functionalized olefin copolymer is selected from the group consisting of ethylene acrylic acid copolymer, ethylene maleic anhydride copolymer, ethylene vinyl acetate copolymer, ethylene vinyl alcohol copolymer, ethylene vinyl chloride copolymer, ethylene methyl acrylate, ethylene ethyl acrylate copolymer, and combinations thereof.

11. The process of claim 5 , wherein the separation is performed at a temperature of about 170° C. to about 230° C. and a pressure of about 400 psig (2800 kPa) to about 600 psig (4100 kPa).

12. The process of claim 3 , wherein the separation is a liquid-vapor separation.

13. The process of claim 12 , wherein the quenching agent has a molecular weight (M n ) of greater than or equal to about 2500 g/mol and a hydroxyl value of greater than or equal to about 25 mg KOH/g.

14. The process of claim 12 , wherein the quenching agent has a molecular weight of greater than or equal to about 3000 g/mol.

15. The process of claim 12 , wherein the quenching agent has a hydroxyl value of greater than or equal to about 30 mg KOH/g.

16. The process of claim 12 , wherein the quenching agent comprises at least one functionalized olefin copolymer.

17. The process of claim 12 , wherein the quenching agent is selected from the group consisting of ethylene acrylic acid copolymer, ethylene maleic anhydride copolymer, ethylene vinyl acetate copolymer, ethylene vinyl alcohol copolymer, ethylene vinyl chloride copolymer, ethylene methyl acrylate, ethylene ethyl acrylate copolymer, and combinations thereof.

18. The process of claim 12 , wherein the separation is performed at a temperature of about 80° C. to about 150° C. and a pressure of about 50 psig (340 kPa) to about 300 psig (2100 kPa).

19. The process of claim 1 , wherein the polymer comprises polyethylene and/or polypropylene.

20. A process for producing a polymer, wherein the process comprises:
polymerizing a hydrocarbon monomer dissolved in a solvent in the presence of a catalyst system under conditions to obtain a first effluent stream comprising a solution of the polymer and the solvent; and
introducing a quenching agent into the first effluent stream to quench the polymerization reaction, wherein the quenching agent is selected from the group consisting of ethylene acrylic acid copolymer, ethylene maleic anhydride copolymer, ethylene vinyl acetate copolymer, ethylene vinyl alcohol copolymer, ethylene vinyl chloride copolymer, ethylene methyl acrylate, ethylene ethyl acrylate copolymer, and combinations thereof.

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Reimers Jay L
• Hong Yifeng
• Hagadorn John R

Classifications

• C08C2/04

  Removal of catalyst residues · CPC title

• C08J2323/06

  Polyethene · CPC title

• C08J2323/12

  Polypropene · CPC title

• C08F2/42

  using short-stopping agents · CPC title

• C08J2433/08

  Homopolymers or copolymers of acrylic acid esters · CPC title