Process For Producing Polyethylene Polymers
Patent No. EP3592780 (titled "Process For Producing Polyethylene Polymers") was filed by Exxonmobil Chemical Patents on Feb 7, 2018. The application was issued on Jul 23, 2025.
Patent Summary
A gas phase polymerization process produces polyethylene polymers with a density less than 0.940 g/cc by contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support within a fluidized bed reactor. The bed, comprising growing polymer particles, formed polymer particles, and catalyst particles, is fluidized by a continuous flow of make-up feed and recycle gas. The particulate support is characterized by laser diffraction particle sizes of d10 $\ge$ 18 $\mu$m, d50 $\ge$ 40 $\mu$m, and d90 $\le$ 100 $\mu$m. This specific support size distribution reduces polymer fines, thereby minimizing entrainment, sheeting, and fouling of reactor components, which enables higher superficial gas velocities and increased production rates.
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Date
Description
EP3592780
- Application Number
- EP18712032A
- Filing Date
- Feb 7, 2018
- Status
- Granted And Under Opposition
- Jun 20, 2025
- Publication Date
- Jul 23, 2025
- External Links
- Slate, Register , Google Patents