Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1987-07-02
1989-02-28
Pal, Asok
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
2101982, 210635, 210656, 210670, B08B 300
Patent
active
048082333
ABSTRACT:
Chromatographic sorbents containing silica are cleaned by using a caustic wash solution having a caustic agent dissolved in water and having aluminum or gallium ions present at an effective concentration so as to prevent deterioration of the sorbent. Caustic solutions having a pH above 8 can be used with a preferred solution having a pH above 13. The cleaning solutions typically have aluminum or gallium ions present at a concentration of from about 0.0005 to 0.1 normal.
REFERENCES:
patent: 2241984 (1941-05-01), Cooper
patent: 2419805 (1947-04-01), Wegst et al.
patent: 2447297 (1948-08-01), Wegst et al.
patent: 4245005 (1981-01-01), Regnier et al.
patent: 4600646 (1986-07-01), Stout
patent: 4658975 (1987-03-01), Barkatt et al.
Ballou et al in J. Appl. Chem. Biotechnol. 23, 119-130 (1973).
Burkard et al in Am. Soc. Brewing Chemists Proc. 1950; 83-100 (1951).
Hudson and Bacon in Ceramic Bulletin, 37, 185-128 (1958).
Alpert and Regnier, J. Chromatogr., 185, 375-392 (1979), "Preparation of Porous Microparticulate Anion-Exchange Chromatography Support for Proteins".
Iler, J. Colloid and Inter. Sci, 43, 399-408, 1973, "Effect of Adsorbed Alumina on the Solubility of Amorphous Silica in Water".
J. G. Atwood et al, J. Chromatogr., 171, 109-115 (1979), "Improvements in Liquid Chromatography Column Life and Method Flexibility by Saturating the Mobile Pyhase with Silica".
Cabic Edward J.
Pal Asok
W. R. Grace & Co.,-Conn.
LandOfFree
Method for high pH washing of silica-based chromatographic sorbe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for high pH washing of silica-based chromatographic sorbe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for high pH washing of silica-based chromatographic sorbe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1364121