SOLVENT RECOVERY FROM SWEEP GAS STREAMS

• Main Authors: TIRTOWIDJOJO, Danil, URAIZEE, Farooq, CHANDRASEKARAN, Jayachandran, RAMESWARAN, Ramesh
• Format: Patent
• Language: English; French
• Published: 05.07.2018
• Subjects: APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BLASTING; DRYING; DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; WEAPONS

A method for removing solvent from a solvent containing sweep gas stream obtained from a fertilizer coating process is disclosed. The method can include directly contacting the solvent containing sweep gas stream with an aqueous composition comprising 50% wt/wt to 100% wt/wt of water, condensing at least a portion of the solvent out of the solvent containing sweep gas stream into the aqueous composition to produce a solvent-enriched aqueous composition and a recovered sweep gas stream, and removing the recovered sweep gas stream from the solvent-enriched aqueous composition. L'invention concerne un procédé d'élimination de solvant d'un flux de gaz de balayage contenant un solvant obtenu à partir d'un processus de revêtement d'engrais. Le procédé peut comprendre la mise en contact directe du flux de gaz de balayage contenant un solvant avec une composition aqueuse comprenant de 50 % massiques à 100 % massiques d'eau, la condensation d'au moins une portion du solvant hors du flux de gaz de balayage contenant un solvant dans la composition aqueuse afin de produire une composition aqueuse enrichie en solvant et un courant de gaz de balayage récupéré, et l'élimination du courant de gaz de balayage récupéré de la composition aqueuse enrichie en solvant.