METHOD OF PROCESSING HYDROCARBON GAS FLOW WITH HIGH CONCENTRATION OF CARBON DIOXIDE USING LEAN SOLVENT CONTAINING AQUEOUS SOLUTION OF AMMONIA Russian patent published in 2013 - IPC B01D53/14 B01D53/62 B01D53/96 

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of high-pressure hydrocarbon gas flow with high concentration of carbon dioxide to be removed therefrom to form treated gas flow and gas flow enriched with carbon dioxide. Proposed method comprises bringing hydrocarbon gas flow in contact with lean solvent bearing aqueous solution of ammonia and product of NH₃-CO₂-H₂O system reaction to facilitate reaction of the portion of carbon dioxide with lean solvent. This brings about a compound containing carbon dioxide. It comprises also releasing treated flow of hydrocarbon gas and used solvent suspension containing settles solid particles and fluid from contact device. It includes feeding portion of used solvent suspension into regenerator for recovery in conditions facilitating decomposition of the portion of settled solid materials to release carbon dioxide. Finally, it includes releasing concentrated flow of carbon dioxide and lean solvent from said regenerator.

EFFECT: high-efficiency treatment.

15 cl, 1 dwg