Neutral-aged hydrophobic organosilicate-modified silica gels

Compositions – Preservative agents – Anti-corrosion

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

106490, 252 62, 252314, 427219, 428405, 501 12, B01J 1300, C04B 1404

Patent

active

058075011

ABSTRACT:
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.

REFERENCES:
patent: 2802850 (1957-08-01), Wetzel
patent: 2892797 (1959-02-01), Alexander et al.
patent: 3015645 (1962-01-01), Tyler
patent: 3024126 (1962-03-01), Brown
patent: 3122520 (1964-02-01), Lentz
patent: 3677784 (1972-07-01), Nitzsche et al.
patent: 3850971 (1974-11-01), Termin et al.
patent: 3979546 (1976-09-01), Lewis
patent: 4006175 (1977-02-01), Termin et al.
patent: 4344800 (1982-08-01), Lutz
patent: 4360388 (1982-11-01), Nauroth et al.
patent: 4985477 (1991-01-01), Collins et al.
patent: 5364697 (1994-11-01), Miyabayashi
Brunauer Emmett and Teller, Jour. Am.. Chem. Soc., 60:309 (1938).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Neutral-aged hydrophobic organosilicate-modified silica gels does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Neutral-aged hydrophobic organosilicate-modified silica gels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutral-aged hydrophobic organosilicate-modified silica gels will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-84280

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.