ACETIC ACETIC CONCENTRATION

ACETIC ACID CONCENTRATION
Dehydration and concentration of acetic acid aqueous solutions, typically coming out latex manufacturing plants.
• STANDARD DISTILLATION PROCESS
The standard way to concentrate acetic acid aqueous streams uses atmospheric distillation according to the typical process flow diagram hereunder shown.
The column is usually fed in vapour phase to avoid scaling due to salts or heavy boilings which the feed holds. These substances are discharged as purge sent to further batch distillation for acetic acid recovery yield increasing.
Concentrated acetic acid is coming out the bottom of the column whilst waste water is removed as a distillate from the top.
• MFC PROCESS
MFC Progetti’s process is basically the same as the standard one but with extra distillation columns, which work under vacuum and pre-concentrate the acetic acid solution.
Heat load required to operate these additional units is recovered from top vapours coming out the main atmospheric distillation column.
The concept is the same as the multiple effects system we widely use for DMF recovery.
Within MFC’s process the following advantages are achievable:

 DWG