Recovery of ammonia or amine from a cation exchange resin

Details Recovery of ammonia or amine from a cation exchange resin Recovery of ammonia or amine from a cation exchange resin

1980-06-10

1981-04-21

Therkorn, Ernest G.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210677, 210687, 423352, 423356, 423357, 544106, 564462, B01J 104

Patent

active

042631459

ABSTRACT:
Ammonia or an amine such as morpholine is recovered from a resin bed comprising an alkali metal, e.g., sodium, and ammonium or amine salts of a strong acid cation exchange resin by contacting the cation resin with an aqueous solution of an alkaline earth metal hydroxide, e.g., calcium hydroxide, thereby exchanging the alkali metal and ammonium or amine cations with alkaline earth metal cations. The aqueous liquid containing the alkali metal and ammonia or amine is subsequently passed through a cation exchange resin which removes the alkali metal from the liquid. The recovery of ammonia or the amine by such method is particularly useful in condensate purification system associated with a power production facility wherein the recovered ammonia or amine can be employed to reduce corrosion in the power production facility and the strong acid resin, upon regeneration, can be used to remove alkali metal ions, particularly sodium, from the facility.

REFERENCES:
patent: 3385787 (1968-05-01), Crits
patent: 3501401 (1970-03-01), Calmon
patent: 3709818 (1973-01-01), Gustafson
patent: 3983220 (1976-09-01), Pollock
patent: 4151079 (1978-05-01), Horembala
External Regeneration of Condensate Polisher Resins by Use of Calcium Hydroxide by Sisson et al., The American Power Conference, Apr. 21, 1970.
Condensate Polishing Experience at Three Mile Island, Harner, Fortieth Annual International Water Conference, Oct. 30, 1979.

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