Аннотация:
An analytical study of the cyclic method of obtaining ammonium salt in the process of water absorption of ammonia and carbon dioxide is carried out on the ground of the phase diagram of the three-component system NH3 – CO2 – H2O . Taking into account the previously refined data on the solubility and the vapor pressure in the system, the temperature and the concentration conditions of the process at the stages of ammonization, carbonation and bicarbonation of the solution are substantiated with precipitation of the target product – ammonium bicarbonate NH4HCO3. Based on the results of a survey of an industrial unit, a working diagram of the production cycle is constructed. The reasons for its discrepancies with the theoretical diagram, resulting in a non-conforming product and a decrease of its yield, are identified.
