05807501 is referenced by 5 patents and cites 15 patents.

The present invention is neutral-aged hydrophobic organosilicate-modified silica gels and a method for their preparation. The method comprises three steps, where in the first step an organosilicate-modified silica hydrosol is contacted with a strong mineral acid at a pH less than about 1 to form an organosilicate-modified silica hydrogel. In the second step the organosilicate-modified silica hydrogel is aged at a pH within a range of about pH 3.5 to pH 8. In the third step the neutral-aged organosilicate-modified silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the organosilicate-modified silica hydrogel to form a hydrophobic organosilicate-modified silica hydrogel having a surface area within a range of about 100 m.sup.2 /g to 750 m.sup.2 /g in the dry state. In a preferred process the hydrophobic organosilicate-modified silica hydrogel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic organosilicate-modified silica hydrogel into a hydrophobic organosilicate-modified silica organogel.

Title
Neutral-aged hydrophobic organosilicate-modified silica gels
Application Number
8/801410
Publication Number
5807501
Application Date
February 20, 1997
Publication Date
September 15, 1998
Inventor
Clifford Carlton Reese
Midland
MI, US
James Richard Hahn
Midland
MI, US
Qin Deng
Midland
MI, US
Gary Thomas Burns
Midland
MI, US
Agent
William F Boley
Assignee
Dow Corning Corporation
MI, US
IPC
C04B 14/04
B01J 13/00
View Original Source