Abstract: A process for selectively removing contaminant ions from a solution includes: a) contacting the solution with magnetic particles coupled to selectively chelating ion exchange functionality containing moieties prepared by: i) activating carboxyl groups on the selectively chelating ion exchange functionality containing moieties by the formation of an acyl fluoride, and ii) reacting the acyl fluoride with the magnetic particles, the magnetic particles having a particle size of less than 10 microns; b) allowing the chelating functionality coupled magnetic particles to selectively bind one or more of the contaminant ions; and, c) extracting the chelating functionality coupled magnetic particles and contaminant ions from the solution by magnetic filtration.

Abstract: A process for selectively removing contaminant ions from a solution includes: a) contacting the solution with magnetic particles coupled to selectively chelating ion exchange functionality containing moieties prepared by: i) activating carboxyl groups on the selectively chelating ion exchange functionality containing moieties by tile formation of an acyl fluoride, and ii) reacting the acyl fluoride with the magnetic particles, the magnetic particles having a particle size of less than 10 microns; b) allowing the chelating functionality coupled magnetic particles to selectively bind one or more of the contaminant ions; and, c) extracting the chelating functionality coupled magnetic particles and contaminant ions from the solution by magnetic filtration.

Abstract: For use in a lockset there is provided a cylindrical housing having a projecting wing and having a bore concentric with an axis. An axially extending rib projects into the bore. A first tumbler mechanism is disposed largely in the wing portion of the housing and includes first tumbler chambers extending through the rib to the bore. A plug is rotatable in the housing about the axis. The plug includes a plug shell and a plug core normally interfitted and axially separable. The plug shell has an axially extending recess therein open at one end. The plug has an adjustable cap adjacent one end and a disc on the other end to limit axial movement. The plug core has a second tumbler mechanism cooperating with the first tumbler mechanism and opening into a keyway therein. The plug core is receivable in the plug shell recess and has a lug on the end opposite the disc interengaging with an inturned flange on the housing to limit withdrawal movement of the plug core in all except one rotary position.