Purification of ammonia by distillation

Details Purification of ammonia by distillation Purification of ammonia by distillation

2006-02-21

2006-02-21

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

With measuring, testing or inspecting

C196S111000, C202S160000, C202S154000, C202S197000, C203S002000, C203S040000, C203S099000, C203SDIG019, C423S237000

Reexamination Certificate

active

07001490

ABSTRACT:
Crude ammonia is separated into a low boiler fraction, a high boiler fraction and an intermediate-boiling pure fraction by continuous fractional distillation in a distillation apparatus configured either as a dividing wall column or as a system of thermally coupled distillation columns. In the process of the present invention, the low boiler fraction is taken off at the top of the distillation apparatus. The intermediate-boiling pure fraction is obtained at a side offtake which is preferably provided with droplet precipitators. In addition, the gas loading of the distillation column is restricted so that the operating pressure is in the range from 2 to 30 bar and the F factor does not exceed 2.0 Pa0.5.

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Knott “Distallation's great leap forward” Process Engineering(1993) pp. 33-34.

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