-
公开(公告)号：US20240392119A1
公开(公告)日：2024-11-28
申请号：US18797032
申请日：2024-08-07
Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
Inventor： Daniel G. Hert , Bryan G. Kubsch
Abstract: A method of operating a polyethylene reactor system includes feeding ethylene, an optional first comonomer, a diluent, and a chromium-based catalyst to a first polymerization reactor. The method further includes contacting ethylene and the comonomer with the catalyst in the first polymerization reactor to form a first product including a first polyethylene. The method further includes feeding the first product from the first polymerization reactor to a second polymerization reactor. The method further includes contacting ethylene and a second optional comonomer with catalyst from the first reactor in the second polymerization reactor to form a second product including the first polyethylene and a second polyethylene. The method further includes controlling one or both of a molecular weight or a breadth of molecular weight distribution of the second product by adjusting a rate of hydrogen fed to one or both of the first polymerization reactor or the second polymerization reactor.
-
公开(公告)号：US12129365B2
公开(公告)日：2024-10-29
申请号：US17645048
申请日：2021-12-18
Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
Inventor： Daniel G Hert , Bryan G. Kubsch
CPC classification number: C08L23/06 , B01J8/1809 , B01J8/1836 , B01J8/20 , B01J21/08 , B01J23/6522 , C08L23/0815
Abstract: A method of operating a polyethylene reactor system includes feeding ethylene, an optional first comonomer, a diluent, and a chromium-based catalyst to a first polymerization reactor. The method further includes contacting ethylene and the comonomer with the catalyst in the first polymerization reactor to form a first product including a first polyethylene. The method further includes feeding the first product from the first polymerization reactor to a second polymerization reactor. The method further includes contacting ethylene and a second optional comonomer with catalyst from the first reactor in the second polymerization reactor to form a second product including the first polyethylene and a second polyethylene. The method further includes controlling one or both of a molecular weight or a breadth of molecular weight distribution of the second product by adjusting a rate of hydrogen fed to one or both of the first polymerization reactor or the second polymerization reactor.
-
公开(公告)号：US20230193001A1
公开(公告)日：2023-06-22
申请号：US17645048
申请日：2021-12-18
Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
Inventor： Daniel G. Hert , Bryan G. Kubsch
CPC classification number: C08L23/06 , B01J8/20 , B01J8/1809 , B01J8/1836 , B01J21/08 , B01J23/6522 , C08L23/0815
Abstract: A method of operating a polyethylene reactor system includes feeding ethylene, an optional first comonomer, a diluent, and a chromium-based catalyst to a first polymerization reactor. The method further includes contacting ethylene and the comonomer with the catalyst in the first polymerization reactor to form a first product including a first polyethylene. The method further includes feeding the first product from the first polymerization reactor to a second polymerization reactor. The method further includes contacting ethylene and a second optional comonomer with catalyst from the first reactor in the second polymerization reactor to form a second product including the first polyethylene and a second polyethylene. The method further includes controlling one or both of a molecular weight or a breadth of molecular weight distribution of the second product by adjusting a rate of hydrogen fed to one or both of the first polymerization reactor or the second polymerization reactor.
-
-
Search Results
3
records
(took 0.013 seconds)
