Process For Manufacturing Polyethylene
Patent No. EP3523334 (titled "Process For Manufacturing Polyethylene") was filed by Akzo Nobel Chemicals International BV on Sep 28, 2017. The application was issued on Nov 15, 2023.
Patent Summary
A process for manufacturing polyethylene homo- or copolymers via high-pressure polymerization of ethylene, optionally with co-monomers, is conducted in a tubular reactor at temperatures between 160-350°C. Tert-amyl peroxyisobutyrate serves as the polymerization initiator and is introduced along the tube length at 2 to 6 inlet points, creating 2 to 6 distinct reaction zones for initiation. The initiator is preferably added in amounts of 100-1000 ppm (more preferably 100-500 ppm) based on polyethylene weight. The process may utilize co-initiators of higher reactivity (e.g., tert-butyl peroxypivalate, di(2-ethylhexyl)peroxydicarbonate, tert-butyl peroxyneodecanoate) or lower reactivity (e.g., di-tert-butyl peroxide, tert-butyl peroxy-3,3,5-trimethylhexanoate). The tubular reactor typically includes a cooling jacket to manage reaction heat.
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Date
Description
EP3523334
- Application Number
- EP17772730A
- Filing Date
- Sep 28, 2017
- Status
- Patent Maintained As Amended
- Oct 13, 2023
- Publication Date
- Nov 15, 2023
- External Links
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