Liquid purification or separation – Processes – Chromatography
Patent
1989-02-14
1991-07-30
Lesmes, George F.
Liquid purification or separation
Processes
Chromatography
428404, 428405, 428407, 210679, 210691, 210807, 502407, 528 32, 528 39, C02F 128, B01D 1504, B01J 2010
Patent
active
050358030
ABSTRACT:
Separation resins are disclosed where silica particles are surface activated by attaching a vinyl terminated lower alkoxy silane to the silica particle and then hydrolyzing the particles. The resulting hydrolyzed particles are hydrophilic and retain at least 10 micromoles of the hydrolyzed vinyl terminated lower alkoxy silane per square centimeter of the silica. A water soluble polymer is then graft polymerized onto the activated and hydrolyzed silica particles. The large amount of hydrolyzed vinyl terminated lower alkoxy silane which remains on the silica along with the hydrophilic nature of the hydrolyzed silica produces an activated particle which is useful for graft polymerization of water soluble polymers onto the particles in large amounts not previously possible. A method for preparing the separation resins is also disclosed.
REFERENCES:
patent: 4431544 (1984-02-01), Atkinson et al.
patent: 4705725 (1987-11-01), Glajch et al.
patent: 4778909 (1988-10-01), Karger et al.
"Chemical Grafting of Vinyl Heterocyclic Monomers to the Surface of Mineral Carriers" by Korshak et al., Polymer Science USSR, vol. 21, pp. 1243-1250.
"Adsorption and Chromatographic Properties of Modified Silica Sorbents for the Production of Viral Preparations" by Krasilnikov, et al., Journal of Chromatography, 446 (1988) 211-219.
"Study of the Chemistry of the Surface of an Adsorbent Based on Silokhrom and N-Vinylpyrrolidone" by Zubakova, et al., Khimii, vol. 60, No. 7, pp. 1491-1494, Jul. 1987.
Brown Christopher
Lesmes George F.
The Regents of the University of California
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