Process for the removal of ammonia from gases

Details Process for the removal of ammonia from gases Process for the removal of ammonia from gases

1991-07-17

1993-01-19

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423315, C01C 300, C01B 1516, C01B 2526

Patent

active

051805669

ABSTRACT:
In order to remove ammonia from water vapor-containing gases, in particular offgases, the gases are brought into intimate contact with warmed polyphosphoric acid, the polyphosphoric acid advantageously having a P.sub.2 O.sub.5 content of from 70 to 84% by weight and a temperature of from 120.degree. to 170.degree. C.

REFERENCES:
patent: 3687618 (1972-08-01), Clausen
patent: 3978195 (1976-08-01), Schrodter et al.
patent: 4271134 (1981-06-01), Teller
World Patents Index/Derwent, AN 78-13477A.

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