PROCESS OF SEPARATION OF ACCOMPANYING OIL GAS Russian patent published in 2004 - IPC

FIELD: gas and petrochemical industries. SUBSTANCE: process of separation of oil accompanying gas includes advance separation of initial mixture, adsorption drying, cleaning from mechanical impurities, consistent cooling in heat exchangers, first separation stage, expansion of gas fraction to intermediate pressure in turbo- expander, second separation stage, separation of condensate formed at first and second separation stages in demethanization unit with built in dephlegmator with withdrawal of light benzene fraction ( methane fraction ) and bottoms product from the latter. Cold of condensate separated from initial gas in process of preliminary cooling and expansion is used to create reflux in demethanization unit and preliminary cooling of part of initial gas. Bottoms product drained from demethanization unit is separated in stabilization column with production of target liquid products: mixture of technical propane and butane and stable casing head gasoline. EFFECT: ensured effective adsorptive dehydration of initial gas and bottoms product drained from demethanization unit from sulfur compounds with use of regenerated part of flow of methane fraction. 8 cl, 1 dwg, 1 tbl