Silica adsorbent on magnetic substrate

Details Silica adsorbent on magnetic substrate Silica adsorbent on magnetic substrate

2005-08-02

2005-08-02

Le, H Thi (Department: 1773)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

Reexamination Certificate

active

06924033

ABSTRACT:
Adsorbent particles comprising superparamagnetic and/or low Curie Temperature transition metal-containing cores surrounded by a hydrous siliceous oxide coating can be formed by an aqueous process wherein the core is precipitated from an aqueous solution and a siliceous oxide coating is deposited thereon while complete drying of the core is avoided until after the siliceous oxide is deposited. The resulting siliceous adsorbents exhibit strong superparamagnetic and/or low Curie temperature magnetic properties with low transition metal leachability.

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patent: 6447911 (2002-09-01), Pryor et al.
patent: 6607667 (2003-08-01), Pryor et al.

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