METHOD OF REGENERATING AMMONIA FROM AMMONIA-SODA PRODUCTION FILTER LIQUID Russian patent published in 2010 - IPC C01D7/18 C02F1/58 C01C1/10 C02F101/16 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of regenerating ammonia from liquid media and can be used in chemical industry, e.g. when processing filter liquid in ammonia-soda production. The method of regenerating ammonia involves decarbonisation of filter liquid, decomposition of ammonium chloride by mixing the filter liquid with lime milk in a rector-mixer at temperature not below 94°C and pressure above equilibrium pressure, and stem distillation of free ammonia. The process is carried out in two steps: at the first step lime milk is supplied in an amount equivalent to amount of sulphate ions coming with the decarbonised filter liquid, and at the second step, the remaining amount of lime milk necessary for stoichiometric decomposition of ammonium chloride is supplied.

EFFECT: method prolongs the life of distillation apparatus in stable barometric mode and uniform supply of lime milk.

1 dwg, 2 ex