专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

AT416197T 未知
公开(公告)号：AT416197T
公开(公告)日：2008-12-15
申请号：AT06804297
申请日：2006-10-02
申请人： UNIVATION TECH LLC
发明人： CAI PING , MATTHEWS WILLIAM
IPC分类号： C08F2/00 , C08F10/00
摘要： A process for increasing a granular particle density of a polymeric product using at least one particle density promoting agent is described. The process includes passing a gaseous stream comprising at least one monomer through a fluidized bed reactor in the presence of a catalyst to form a polymeric product having a first granular particle density of less than or equal to about 850 kg/m3, contacting the polymeric product with at least one particle density promoting agent to increase the granular particle density of the polymeric product by at least 2%, withdrawing the polymeric product having an increased granular particle density and a recycle stream comprised of unreacted monomers, and cooling and reintroducing the recycle stream into the fluidized bed reactor with sufficient additional monomer to replace the monomer polymerized and withdrawn as the polymeric product.

2. 发明专利

SG10201906006QA METHOD FOR CONTROLLING POLYOLEFIN PROPERTIES DURING POLYMERISATION 未知
公开(公告)号：SG10201906006QA
公开(公告)日：2019-08-27
申请号：SG10201906006Q
申请日：2014-09-25
申请人： UNIVATION TECH LLC
发明人： GOODE MARK , ALEXANDRE FRANCOIS , CANN KEVIN J , KOPP BARBARA , MATTHEWS WILLIAM , MOORHOUSE JOHN , MURE CLIFF
摘要： METHODSFOR CONTROLLING POLYMER PROPERTIES Disclosed herein are methods of controlling polymer properties in polymerization processes that use a chromium-based catalyst. An embodiment discloses a method of producing a polyolefin comprising: contacting a reaction mixture and a reduced chromium oxide catalyst in a gas-phase reactor to produce the polyolefin, wherein the reaction mixture comprises a monomer and a co-monomer; and changing a reaction temperature in the gas- phase reactor by about ° C or more whereby a gas molar ratio of the co-monomer to the monomer is changed by about 2% or more and a co-monomer content of the polyolefin at substantially constant density is changed by about 2% or more. Additional methods and compositions are also provided. [FIG.1]

你已经成功收藏专利！

检索式保存成功!

IPRDB