| abstract |
A system and method for separating purge gas recovered from a polyethylene product are provided. The method comprises the steps of recovering a polyethylene product containing at least one volatile hydrocarbon from a polymerization reactor and contacting the polyethylene product with a purge gas to remove at least a portion of the volatile hydrocarbons to remove the polymer product and volatile hydrocarbons Thereby producing a rich purge gas product. The purge gas product is compressed to a pressure of about 2,500 kPaa to about 10,000 kPaa and then cooled and separated into at least a first product, a second product, and a third product. Subsequently, at least a portion of one or more of the first, second, or third product may each be recycled as purge gas, recycled to the polymerization reactor, or recycled to the volatile hydrocarbon-rich purge gas product prior to compression. |