Technology Unit

The Reactant Gas Stream entering the Gas-Phase Polymerization Reactor is circulated through the Bed, goes to a Blower and then cooled in an external Heat Exchanger to remove the exothermic reaction heat. Also, Heat Removal is primarily done by Condensation of Propylene where 10-12% of Propylene fed
into the Reactor is liquid. The Reactor System holds an Expandable Vertical Pressure Vessel in the upper section that handle Polymer Particles and it is constructed of carbon steel and operates at 34.5 bar and 65°C. The operating conditions satisfy the dew point of the Monomer. The Fresh Liquid Polymer-Grade Propylene is combined with Recycled Gases and enters the Reactor Bottom. Catalyst Components and Hydrogen are added into the Reactor to control molecular weight and selectivity. Polymer is taken out, periodically from the Polymerization Reactor into a series of High-Pressure Gas/Solid Separators. The separated Gas is recycled back to the Top of the Reactor and the Polymer Powder goes to the Separators.^[1]

1. Hisham A. Maddah; American Journal of Polymer Science; p-ISSN: 2163-1344; e-ISSN: 2163-1352 2016; 6(1): 1-11; doi:10.5923/j.ajps.20160601.01; Creative Commons BY 4.0