Method and apparatus for regulating ammonia concentration during

Details Method and apparatus for regulating ammonia concentration during Method and apparatus for regulating ammonia concentration during

1981-09-24

1983-05-03

Spitzer, Robert H.

Gas separation

Means within gas stream for conducting concentrate to collector

55 51, 55 70, 55 73, 55196, 55228, 210681, B01D 5314, B01D 1900

Patent

active

043819265

ABSTRACT:
Methods and apparatus for scrubbing gaseous mixtures containing ammonia are disclosed in which the gaseous mixtures are contacted with methanol in a scrubbing column to remove any acidic gases therefrom, the methanol is separated from the acidic gases and recirculated, and at least a portion of the methanol is contacted with an ion exchange material so as to remove at least a portion of the ammonia therefrom. In one embodiment of the invention, the method and apparatus also includes addition of methanol to the gaseous mixture prior to contacting in the scrubbing column so as to produce a methanol-water mixture with any water contained in the gaseous mixture and prevent the icing thereof, and includes separating the methanol-water mixture from the gaseous mixture prior to contacting with the scrubbing column as well as separating the methanol from the water and recirculating the methanol.

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