POLYMERIZATION PROCESS IN GASEOUS PHASE

• Main Authors: SCAROLA LEONARD SEBASTIAN, BROWN ROBERT CECIL, BOYSEN ROBERT LORENZ, GOODE MARK GREGORY, MOORHOUSE JOHN HENRY, BERNIER ROBERT JOSEPH NOEL, WILLIAMS GARY HARRY, SPRIGG THOMAS EDWARD, WANG DUAN FAN, OLSEN ROBERT DARRELL
• Format: Patent
• Language: English
• Published: 11.06.1997
• Edition: 6
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS RELATED TO TYRES; HETEROCYCLIC COMPOUNDS; HUMAN NECESSITIES; HYGIENE; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL

Polymers are produced in a stirred bed or gas fluidised bed polymerisation zone of growing polymer particles by (1) introducing a stream of monomer(s), and opt. inert gas(s) or liq(s)., into the polymerisation zone; (2) continuously or intermittently introducing a catalyst; (3) continuously or intermittently withdrawing polymer; and (4) continuously withdrawing unreacted gases, compressing and cooling the gases while maintaining the temp. in the polymerisation zone below the dew pt. of at least one monomer; with the proviso that if there is only one monomer present in the feed stream, an inert gas is also present.