High-Purity Monomer Catalysts
In order to protect the activity of catalysts used for polymerization, high purity monomers such as ethylene and propylene are treated with specialty adsorbents to remove catalyst poisons, usually traces of oxygenates, or to remove reaction inhibitors.
Process
In order to protect the above-mentioned sensitive catalysts, monomers undergo rigorous purification using specialty adsorbents:
- Molecular Sieves: Used to remove catalyst poisons like oxygenates or reaction inhibitors from ethylene and propylene.
- Doped Aluminas: Zeolite-doped aluminas or chemisorbents are employed to strip out specific contaminants like arsines.