Moiety for selective separation
AssigneeNational Research Development Corporation
InventorsBrian J. Brisdon, Richard England, Sera S. Abed-Ali
Life of this patent
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Abstract
New C-substituted crown ethers such as ##STR1## are made by reacting a 1,2-diol (chain length m'4) with ClCH.sub.2 --(CH.sub.2 --O--CH.sub.2 --).sub.n+1 CH.sub.2 Cl. These compounds have a stronger affinity for secondary amines than for tertiary amines and therefore may be used to separate mixtures, especially when attached to polysiloxane backbones or substrates via their unsaturated bond.
Claims5
A carrier including one or more pendant alkylene-polyoxa-cycloalkane groups derived from a cycloalkane selected from the group consisting of 1,4,7,10-tetraoxa-2-alkenyl-cyclododecane, 1,4,7,10,13-pentaoxa-2-alkenyl-cyclopentadecane and 1,4,7,10,13,16-hexaoxa-2-alkenyl cyclooctadecane sufficient for enabling separation of secondary amines from tertiary amines.
A method of separating secondary from tertiary amines, comprising contacting them with a carrier including one or more pendant alkylene-polyoxa-cycloalkane groups derived from a cycloalkane selected from the group consisting of 1,4,7,10-tetraoxa-2-alkenyl-cyclododecane, 1,4,7,10,13-pentaoxa-2-alkenyl-cyclopentadecane and 1,4,7,10,13,16-hexaoxa-2-alkenyl cyclooctadecane sufficient for enabling separation of secondary amines from tertiary amines.
Dependencies are inferred from the claim text.