公开(公告)号：AT212320T

公开(公告)日：2002-02-15

申请号：AT00115181

申请日：2000-07-13

Applicant: DEGUSSA

Inventor： PLAMBECK-FISCHER PEER DR ,  HAMM VOLKER ,  SCHARFE THOMAS ,  MANGOLD HELMUT DR ,  HENNIG THOMAS DR

IPC: B41M5/00 ,  B01J21/04 ,  B01J32/00 ,  B41M5/50 ,  B41M5/52 ,  C01F7/02 ,  C01F7/30 ,  C09K3/14 ,  C09K3/30

Abstract: Pyrogenic alumina (I) of large surface area, with a BET specific surface area of over 115 m /g and Sears number of over 8 ml/2g (EP 0717008), is claimed.

公开(公告)号：DE4400170C1

公开(公告)日：1995-04-06

申请号：DE4400170

申请日：1994-01-05

Applicant: DEGUSSA

Inventor： MICHAEL GUENTHER DR ,  STADTMUELLER GUENTER ,  HENNIG THOMAS DR

IPC: G01N33/44 ,  G01N21/82 ,  G01N31/02 ,  G01N33/32 ,  G01N33/38 ,  G01N21/51

Abstract: The thickening effect of flame hydrolytically produced silicon dioxide is determined by making a dispersion of the flame hydrolytically produced silicon dioxide in water or ethanol and measuring the turbidity of this dispersion.