公开(公告)号：US20250101149A1

公开(公告)日：2025-03-27

申请号：US18717135

申请日：2022-12-14

Applicant: Exxonmobil Technology and Engineering Company

Inventor： Stacy Jordahl ,  Jun Shi ,  Rong Ma ,  Antonios K. Doufas ,  Narayanaswami Dharmarajan

IPC: C08F10/06

Abstract: Processes for making propylene-based copolymers having broad molecular weight distributions and broad comonomer distributions using a single tubular reactor. Processes for making a propylene-based copolymer can include introducing propylene and at least one other olefin comonomer to a tubular reactor to produce a propylene-based copolymer having a broad comonomer distribution, a Mw of about 10 kg/mol to about 2.000 kg/mol, and a MWD of about 2.0 to about 10.0. The tubular reactor can include one or more heat exchanger elements, preferably a spiral heat exchanger. Propylene-based copolymer compositions can include propylene derived units and at least one other comonomer derived units, wherein the copolymer compositions have a broad comonomer distribution, a Mw of about 10 kg/mol to about 2.000 kg/mol, and a MWD of about 2.0 to about 10.0. Such compositions can have broad orthogonal comonomer distributions.

公开(公告)号：US20250043034A1

公开(公告)日：2025-02-06

申请号：US18717173

申请日：2022-12-14

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Giriprasath Gururajan ,  Rong Ma ,  Narayanaswami Dharmarajan ,  Jean-Roch Schauder

IPC: C08F2/01 ,  C08F4/659

Abstract: Processes for making olefin copolymers, particularly ethylene-based copolymers. A process for making an olefin copolymer can include introducing an olefin monomer, at least one other olefin comonomer, and a single type of catalyst system to a tubular reactor to produce an olefin copolymer containing: a) an absolute comonomer distribution (CD) slope 90 of about 2.0 to about 30.0, an absolute CD slope 75 of about 2.0 to about 30.0, an absolute CD slope 50 of about 2.0 to about 30.0, or an absolute CD slope 25 of about 2.0 to about 30.0; b) a first long chain branching index (g′(Mz)) of about 0.30 to about 1.0; and c) a second long chain branching index (g′(Mz+1)) of about 0.30 to about 1.0. The tubular reactor can include one or more plug flow components, one or more spiral heat exchangers, and/or a recycle pump.