Process and device for manufacturing an aromatic alkylene polymer
US7288620B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2006 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Aug 22, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B2009/168
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to-a process and a device for the continuous manufacture of a polymer of an aromatic alkylene monomer e.g. styrene comprising a bulk polymerisation of the monomer and a devolatilization of the resulting polymer in at least two successive steps so as to separate the polymer from the unreacted monomer and the oligomers formed during the polymerisation. The process comprises conveying a first gas stream resulting from the first step of the devolatilization into a first zone Z1 for direct condensation and fractionation, removing a gas stream G1 comprising essentially the monomer from the top of Z1, and removing a liquid stream L1 rich in oligomers from the bottom of Z1, a portion of L1 being taken, cooled and then returned into Z1. It also comprises conveying a second gas stream resulting from the second step of the devolatilization into a second zone Z2 for direct condensation and fractionation, this zone being also fed with the other portion of L1, removing a gas stream G2 comprising the monomer from the top of Z2, and removing a liquid stream L3 comprising essentially the oligomers from the bottom of Z2. The process and the device are particularly suita…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.