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US 2009/0023936 A1Published application
Method of purifying vinylene carbonate
AssigneeSaltigo GmbH
InventorsReinhard Langer, Paul Wagner, Heinrich Grzinia
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Abstract
The present invention relates to the industrial purification of vinylene carbonate (VC). It was found that it is advantageous to subject the VC to be purified, before the purifying distillation, to a simple thermal treatment with organic compounds which have amidic nitrogen-hydrogen bonds.
Claims4
Process for the purification of vinylene carbonate, in which the vinylene carbonate to be purified
- a) is brought into contact at a temperature in the range of 25 to 180° C. with an organic compound having at least one amidic nitrogen-hydrogen bond, optionally with addition of solvent,
- b) any precipitated solid is optionally filtered off,
- c) and the purified vinylene carbonate is obtained from the remaining solution via a column distillation.
Dependencies are inferred from the claim text.