公开(公告)号：DE50103519D1

公开(公告)日：2004-10-14

申请号：DE50103519

申请日：2001-07-07

Applicant: DEGUSSA

Inventor： SCHUBERT DR ,  HELLWIG KLAUS-DIETER ,  PICKEL MICHAEL ,  PUETZ HANS-DIETER

IPC: C01B33/12 ,  C09C1/30

公开(公告)号：DE59900420D1

公开(公告)日：2001-12-20

申请号：DE59900420

申请日：1999-09-03

Applicant: DEGUSSA

Inventor： HASENZAHL DR ,  SCHUBERT DR ,  JANTKE RALF

IPC: B01J20/10 ,  B01J20/30 ,  B01J21/08 ,  B01J29/00 ,  B01J29/03 ,  C01B33/187 ,  C01B33/20 ,  C01B37/00 ,  C01B37/02 ,  C08K3/34 ,  C08L21/00 ,  C08L83/04 ,  C09B63/00

公开(公告)号：DE50100670D1

公开(公告)日：2003-10-30

申请号：DE50100670

申请日：2001-08-07

Applicant: DEGUSSA

Inventor： SCHUBERT DR ,  HELLWIG KLAUS-DIETER ,  MUELLER ASTRID

IPC: C01B33/12 ,  B41M5/00 ,  B41M5/50 ,  B41M5/52 ,  C01B33/143 ,  C01B33/193 ,  C09C1/30 ,  C09C3/06 ,  C09D129/04 ,  D21H19/40

Abstract: Al-doped precipitated silica particles have a BET surface area above 300 m /g and uniformly distributed Al. An Independent claim is also included for production of the doped silica in which an Al salt solution is added in step (a) and (c) of the following process: (a) heating a water/Na silicate mixture to 70-86 degrees C and neutralizing the Na silicate with H2SO4; (b) ageing the solution for 30-120 minutes; (c) adjusting to pH 3-7 by addition of H2SO4; and (d) filtering and spray drying and milling the washed filter cake.