Metal extraction from solution and immobilized chelating agents used therefor
AssigneeDow Corning Corporation
InventorEdwin P. Plueddemann
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Abstract
What is disclosed are novel metal chelating agents which are bonded to inorganic substrates to immobilize them. An example of such a metal chelating agent is (CH.sub.3 O).sub.3 Si(CH.sub.2).sub.3 NH(CH.sub.2 CH.sub.2 NH).sub.2 (CH.sub.2).sub.3 Si(OCH.sub.3). An example of an inorganic substrate is a silica gel.
Claims22
A method for preparing an immobilized chelating agent which comprises treating an inorganic solid substrate with a silylating agent which is a compound of the formula (RO).sub.3 SiQNH(CH.sub.2 CH.sub.2 NH).sub.x QSi(OR).sub.3 where x has a value of 2, 3, or 4, R is a methyl, ethyl, propyl or butyl radical and Q is propylene or butylene.
Dependencies are inferred from the claim text.