公开(公告)号：JPH1081508A

公开(公告)日：1998-03-31

申请号：JP12823597

申请日：1997-05-19

Applicant: DEGUSSA

Inventor： KRAUSE HELMFRIED DR ,  ROTGERINK HANS LANSINK DR ,  TACKE THOMAS DR ,  PANSTER PETER DR ,  BURMEISTER ROLAND DR

IPC: B01J21/08 ,  B01J23/52 ,  B01J23/66 ,  B01J35/10 ,  B01J37/00 ,  C01B33/12 ,  C04B35/14 ,  C04B35/634 ,  C04B35/636 ,  C07B61/00 ,  C07C29/04 ,  C07C31/08 ,  C07C31/10 ,  C07C67/035 ,  C07C67/04 ,  C07C69/15 ,  C09C1/30

Abstract: PROBLEM TO BE SOLVED: To obtain compressed powder improved in purity, activity, selectivity, etc., by compressing powder obtained by drying a mixture of a specific silicon dioxide with methyl cellulose, microwax and/or polyethylene glycol and water and carrying out heat treatment of the compressed powder. SOLUTION: A volatile silicon compound is sprayed into a detonating gas frame comprising hydrogen and air to hydrolyze the silicon compound to afford silicon dioxide comprising >99.8wt.% SiO2 content and /g BET surface area, 0.5-1.3mL/g pure volume and 10-250N breakage strength and having

公开(公告)号：DE19619961A1

公开(公告)日：1997-11-20

申请号：DE19619961

申请日：1996-05-17

Applicant: DEGUSSA

Inventor： KRAUSE HELMFRIED DR ,  ROTGERINK HANS LANSINK DR ,  TACKE THOMAS DR ,  PANSTER PETER DR ,  BURMEISTER ROLAND DR

IPC: B01J21/08 ,  B01J23/52 ,  B01J23/66 ,  B01J35/10 ,  B01J37/00 ,  C01B33/12 ,  C04B35/14 ,  C04B35/634 ,  C04B35/636 ,  C07B61/00 ,  C07C29/04 ,  C07C31/08 ,  C07C31/10 ,  C07C67/035 ,  C07C67/04 ,  C07C69/15 ,  C09C1/30 ,  B01J2/22 ,  B01J31/04 ,  B01J27/182

Abstract: Pressings based on pyrogenic silica (SiO2) have an outside diameter of 0.8-20 mm, BET surface area of 30-400 m /g, pore volume of 0.5-1.3 ml/g, breaking strength of 10-250 N, composition > 99.8 wt.% SiO2 and