VERFAHREN ZUR REINIGUNG VON DIMETHYLACETAMID (DMAC)

The invention relates to a process for distillatively purifying crude dimethylacetamide (crude DMAc) comprising DMAc, low boilers and high boilers 5 by removing the low boilers and the high boilers to obtain pure DMAc in one of the column configurations listed hereinbelow: (I) a main column (MC) wit...

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Bibliographic Details
Main Authors ALTHAUS, KLAUS, KIRCHNER, TANJA, STAATZ, HARTMUT, SCHOENMAKERS, HARTMUT, PESCHEL, WERNER
Format Patent
LanguageGerman
Published 15.04.2007
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The invention relates to a process for distillatively purifying crude dimethylacetamide (crude DMAc) comprising DMAc, low boilers and high boilers 5 by removing the low boilers and the high boilers to obtain pure DMAc in one of the column configurations listed hereinbelow: (I) a main column (MC) with sidestream column (SC) or (II) a dividing wall column (DWC), which operating at least the main column (MC) in column configuration (I) and the dividing wall column (DWC) in column configuration (II) at a top pressure in the range from 0.5 to 1.8 bar absolute.
Bibliography:Application Number: AT20040725673T