A process for the continuous preparation of aqueous...

Details A process for the continuous preparation of aqueous... A process for the continuous preparation of aqueous...

C - Chemistry, Metallurgy

07

C

C07C 47/052 (2006.01) B01D 3/00 (2006.01) C07C 29/50 (2006.01) C07C 31/20 (2006.01) C07C 41/50 (2006.01) C07C 43/303 (2006.01) C07C 45/38 (2006.01) C07C 45/78 (2006.01) C07C 45/82 (2006.01)

Patent

CA 2162320

The process uses a supply column (3) and additional heat exchangers (10, 11, 13) associated with absorption columns (8). Air and methanol from outside and a subcurrent of methanol, originating from a cold methanol current exiting from the supply column (3), are fed to the supply column (3). This exiting current recirculates through the additional heat exchangers (10, 11, 13) and is divided into the subcurrent which returns to the supply column (3) and another subcurrent which is fed to an evaporator (4). A methanol-air mixture exits from the head of the supply column (3) and is fed to an evaporator (4). The cold methanol is cooled in the supply column (3) by evaporation of the methanol forming part of the methanol-air mixture.

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