Moiety for selective separation

Details Moiety for selective separation Moiety for selective separation

1989-07-13

1990-03-13

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210660, 21050028, 21050033, 21050036, B01D 1300

Patent

active

049081357

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.

REFERENCES:
patent: 3888877 (1975-06-01), Lehn
patent: 3966766 (1976-06-01), Lehn
patent: 4156683 (1979-05-01), Lehn
patent: 4843158 (1989-06-01), Smith

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