METHOD OF EXTRACTION FROM THE TECHNOLOGICAL CONDENSATE OF HYDROCARBON AND AMMONIA Russian patent published in 2018 - IPC C02F1/04 C02F1/58 B01D3/14 B01D5/00 

FIELD: oil and gas industry.

SUBSTANCE: use a setup with two columns (1 and 2). In column 1 H₂S and concentrate NH₃ are extracted by methods of stripping and absorption. In column 2 NH₃ and purified condensate by methods of rectification, absorption, cooling and partial condensation of the vapour-gas mixture in the upper section. The condensate from the absorption stage in column 2 is recirculated to column 1. Purified and cooled condensate is used as an absorbent and washing liquid in the packed sections of columns 1 and 2. The crystalline ammonium salts formed in the process decompose in high temperature zones. In this case, the condensate is returned from the upper section of column 2 to the feedstock of column 2.

EFFECT: increase of the clarity of separation between hydrogen sulphide and ammonia in a wide range of their concentrations, especially with a high content of these impurities.

3 cl, 1 ex, 3 dwg, 1 tbl