METHOD OF FIELD RECOVERY OF TRIETHYLENE GLYCOL Russian patent published in 2012 - IPC B01D53/26 

FIELD: process engineering.

SUBSTANCE: invention relates to has industry and may be used for field recovery of triethylene glycol in drying of natural gas. Proposed method comprises absorption of moisture by triethylene glycol from gas flow, stripping of water from triethylene glycol saturated with moisture and returning recovered absorbent to natural gas drying. Note here that, additionally, aromatic hydrocarbons are removed from moisture-saturated triethylene glycol by extracting it by water from used mix with subsequent settling of said mix to complete demixing into top dark brown layer, clarified central layer and bottom black layer. Central layer is drained through filter to filtrate darkening start and film floating up on its surface. Then, central layer filtrate cleaned of solid impurities is fed into the flow of moisture-saturated triethylene glycol fed from absorber into evaporation column for water stripping, hence, completing ethylene glycol recovery.

EFFECT: recovery of moisture-saturated capacity of triethylene glycol at existing units without using complex processing equipment.

2 dwg