Vacuum carbonate process operating problems

Additional regeneration procedures include desorption by hot inert gases, desorption under vacuum, and, more important, use of conventional liquid solvents. The main problem for the latter is the slow desorption and the difficult solvent regeneration, and the last few years have seen the development of regeneration with supercritical solvents, mainly carbon dioxide and water. Complete recovery of components and environmental safety of the corresponding industrial operations require also development of low-waste or waste-free extraction procedures and the corresponding process apparatus. 

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