| abstract |
For separating system and the method for the purging gas reclaimed from polyethylene product.The method can include reclaiming, from polymer reactor, the polyethylene product comprising one or more volatile hydrocarbons and making polyethylene product contact with purging gas to remove at least some of volatile hydrocarbon to prepare polymer product and the purging gaseous product of concentrating volatile hydrocarbon of the reduction of volatile hydrocarbon concentration.Compress this purging gaseous product to pressure and be about 2,500kPaa to about 10,000kPaa, and then can cool down and be separated at least the first product, a kind of second product and a kind of third product.Then the purging gaseous product that can be recycled to polymer reactor or concentrating volatile hydrocarbon at least partially as purging gas the most respectively of one or more of the first product, the second product and third product. |