Najeeb Kuzhiyil

US Patent:

20210284769, Sep 16, 2021

Filed:

May 3, 2021

Appl. No.:

17/240437

Inventors:

- Baytown TX, US
Mark H. Li - Sugar Land TX, US
Jennifer L. Rapp - Houston TX, US
Pramod J. Nandapurkar - Seabrook TX, US
Brian H. Wahn - Houston TX, US
Craig J. Emett - Houston TX, US
Najeeb M. Kuzhiyil - League City TX, US
Jian Yang - Houston TX, US

International Classification:

C08F 210/16
C08F 4/659
C08F 4/6592
C07C 2/30
C07C 2/32

Abstract:

In at least one embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin to a first catalyst system comprising activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The first alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more. The process includes introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition including an acid catalyst in a second reactor to form a second reactor effluent comprising PAO trimer.

US Patent:

20190359744, Nov 28, 2019

Filed:

Aug 9, 2019

Appl. No.:

16/537349

Inventors:

- Baytown TX, US
Mark H. Li - Sugarland TX, US
Jennifer L. Rapp - Houston TX, US
Monica D. Lotz - Houston TX, US
Craig J. Emett - Houston TX, US
Najeeb M. Kuzhiyil - League City TX, US
Jian Yang - Houston TX, US

International Classification:

C08F 10/14
C08F 4/6592
C08F 4/659

Abstract:

The present disclosure generally relates to processes to produce alpha-olefin oligomers and poly alpha-olefins. In an embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin and a first catalyst system comprising a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes PAO dimer comprising at least 96 mol % of vinylidene and 4 mol % or less of trisubstituted vinylene and disubstituted vinylene, based on total moles of vinylidene, trisubstituted vinylene, and disubstituted vinylene. The method includes introducing the first reactor effluent, a second alpha-olefin and a second catalyst composition comprising an acid catalyst into a second reactor under second reactor conditions to form a second reactor effluent comprising PAO trimer.

US Patent:

20190359748, Nov 28, 2019

Filed:

Aug 9, 2019

Appl. No.:

16/537381

Inventors:

- Baytown TX, US
Mark H. Li - Sugar Land TX, US
Jennifer L. Rapp - Houston TX, US
Pramod J. Nandapurkar - Seabrook TX, US
Brian H. Wahn - Houston TX, US
Craig J. Emett - Houston TX, US
Najeeb M. Kuzhiyil - League City TX, US
Jian Yang - Houston TX, US

International Classification:

C08F 210/16
C08F 4/6592
C08F 4/659

Abstract:

In at least one embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin to a first catalyst system comprising activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The first alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more. The process includes introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition including an acid catalyst in a second reactor to form a second reactor effluent comprising PAO trimer.