Polymerization of purge stream containing 1-octene

Patent metadata

Field	Value
Publication number	US-12516138-B2
Application number	US-202117914658-A
Country	US
Kind code	B2
Filing date	Mar 26, 2021
Priority date	Mar 31, 2020
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

The present disclosure provides a process. In an embodiment, the process includes providing a purge stream containing octene monomer. The process includes contacting, under polymerization conditions, the purge stream with a bis-biphenylphenoxy catalyst, and forming an octene polymer having an absolute weight average molecular weight (Mw(Abs)) greater than 1,300,000 g/mol and a Mw(Abs)/Mn(Abs) from 1.3 to 3.0.

First claim

The invention claimed is:

1 . A process comprising:
providing a purge stream comprising octene monomer; contacting, under polymerization conditions, the purge stream with a bis-biphenylphenoxy catalyst having a formula (V)

or having the formula (VI)

 and
forming an octene homopolymer having an absolute weight average molecular weight (Mw (Abs) ) greater than 1,300,000 g/mol and a Mw (Abs) /Mn (Abs) from 1.3 to 3.0, the octene homopolymer comprising a residual amount of zirconium in an amount from greater than 0 ppm to less than 300 ppm.

2 . The process of claim 1 comprising
providing a purge stream composed of
from 20 wt % to 50 wt % 1-octene,
from 10 wt % to 50 wt % solvent, and
from 10 wt % to 70 wt % octene isomers.

3 . The process of claim 2 comprising
removing, before the contacting, any ethylene present in the purge stream; and
providing a purge stream comprising from 0 wt % to less than 0.01 wt % ethylene.

4 . The process of claim 1 comprising
excluding titanium-containing catalyst from the contacting step.

5 . The process of claim 1 wherein the octene homopolymer comprises from 30 ppm to 160 ppm zirconium.

6 . The process of claim 5 wherein the octene homopolymer comprises from 14 ppm to 125 ppm germanium.

Assignees

• Dow Global Technologies Llc

Inventors

• Koenigs David
• Ewart Sean W
• Knight Troy E

Classifications

• C08F4/76

  selected from titanium, zirconium, hafnium, vanadium, niobium or tantalum · CPC title

• C08F2500/03

  Narrow molecular weight distribution, i.e. Mw/Mn < 3 · CPC title

• C08F2500/01

  High molecular weight, e.g. >800,000 Da. · CPC title

• C08F110/14 Primary

  Monomers containing five or more carbon atoms · CPC title

• Y02P20/582

  Recycling of unreacted starting or intermediate materials · CPC title