Technology Type

In Bulk Polymerization, Liquid Propene acts as a Solvent to prevent the Precipitation of the Polymer. The Polymerization proceeds at 60 to 80 °C and 30 to 40 atm are applied to keep the Propene in the Liquid State. For the Bulk Polymerization, typically Loop Reactors are applied. The Bulk Polymerization is limited to a maximum of 5% Ethylene as Comonomer due to a limited Solubility of the Polymer in the Liquid Propene.

Examples of Bulk-Phase Polymerization Technologies employing Loop Reactors (LR) or Stirred Tank Reactors (STR) are the Hypol Process with two STRs in Series, the Spheripol and Hypol 2 Processes each employing two LRs in Series.

Source: Wikipedia, Polypropylene