公开(公告)号：EP1255696A1

公开(公告)日：2002-11-13

申请号：EP01912717.4

申请日：2001-02-09

申请人： Millennium Inorganic Chemicals, Inc.

发明人： DEBERRY, James, Clark ,  ROBINSON, Michael ,  POMPONI, Mark, Douglas ,  BEACH, Anthony J. ,  XIONG, Yun ,  AKHTAR, Kamal

IPC分类号： C01G23/047

CPC分类号： C01G23/07 ,  C01P2004/62

摘要： A process for controlling the formation of TiO2 particles in a multi-stage vapor-phase oxidation reactor wherein the process includes the steps of limiting the fraction of TiCl4 converted into TiO2 in the reaction stream of a first or intermediate stage of the reactor under conditions that control the mean residence time distribution of the reacting mass. By running the reaction in this manner, the growth of TiO2 particles produced is so controlled that after subsequent standard finishing steps (e.g. milling) the fraction of particles having an average size of less than 0.5 νm is reduced or minimized.

公开(公告)号：EP1255696B1

公开(公告)日：2008-04-23

申请号：EP01912717.4

申请日：2001-02-09

申请人： Millennium Inorganic Chemicals, Inc.

发明人： DEBERRY, James, Clark ,  ROBINSON, Michael ,  POMPONI, Mark, Douglas ,  BEACH, Anthony J. ,  XIONG, Yun ,  AKHTAR, Kamal

IPC分类号： C01G23/047 ,  C01G23/07

CPC分类号： C01G23/07 ,  C01P2004/62

摘要： A process for controlling the formation of TiO2 particles in a multi-stage vapor-phase oxidation reactor wherein the process includes the steps of limiting the fraction of TiCl4 converted into TiO2 in the reaction stream of a first or intermediate stage of the reactor under conditions that control the mean residence time distribution of the reacting mass. By running the reaction in this manner, the growth of TiO2 particles produced is so controlled that after subsequent standard finishing steps (e.g. milling) the fraction of particles having an average size of less than 0.5 mu m is reduced or minimized.