公开(公告)号：US3608836A

公开(公告)日：1971-09-28

申请号：US3608836D

申请日：1969-04-11

申请人： PPG INDUSTRIES INC

发明人： BRYANT LEONARD S ,  HICKENBOTHAM HARLEY D

IPC分类号： C01G23/07 ,  C09C1/36 ,  B02C23/06

CPC分类号： C01G23/07 ,  C01P2004/51 ,  C01P2004/62 ,  C01P2006/60 ,  C01P2006/80 ,  C09C1/3692 ,  C09C3/04 ,  C09C3/041 ,  C09C3/06 ,  C09C3/08

摘要： Offgrade titanium dioxide produced by vapor phase reaction of titanium halide is reclaimed to yield pigmentary titanium dioxide that can be blended with production grades of titanium dioxide pigment. Reclamation includes the steps of wet milling waste titanium dioxide under nonpeptizing conditions, and hydroclassification of the milled slurry.