专利名称：Process for efficient polymer particle
purging
发明人：Jan W. Van Egmond,Jeffrey D. Goad,John K.
Kaarto,Daniel J. Chismar
申请号：US16332009申请日：20170911公开号：US11104749B2公开日：20210831
专利附图：
摘要：A process comprising polymerizing olefin monomers and optionally
comonomers in a first reactor vessel, thereby forming a raw product stream comprising
polymerized solids, unreacted monomer and optionally comonomer, the polymerizedsolids comprising olefin polymer, volatile organic compounds (VOC) and catalyst system.Then the polymerized solids are contacted with a catalyst poison selected from carbonmonoxide, carbon dioxide, oxygen, water, alcohols, amines, or mixtures thereof, therebyforming a passivated stream. The passivated stream is maintained in an agitated statewithin a second reactor. The passivated stream within the second reactor is thencontacted with a circulating gas comprising unreacted monomer for a residence time,thereby reducing the concentration of VOC in the polymerized solids by at least 10 wt %compared to the level before entering the second reactor, thereby forming a purifiedolefin polymer solids stream.
申请人：W. R. GRACE & CO.-CONN.
地址：Columbia MD US
国籍：US
代理机构：Dilworth IP, LLC
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