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US 6,992,212 B2Granted
Felxible method for the common production of formic acid, a carboxylic acid having at least two carbon atoms, and/or the derivatives of the same
AssigneeBASF SE
InventorsPeter Zehner, Jörg Pastre, Wolfram Stüer
Life of this patent
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Abstract
Formic acid and a carboxylic acid having at least two carbon atoms and/or derivatives thereof are prepared jointly by a process in which (a) a formic ester (I) is transesterified with a carboxylic acid having at least two carbon atoms (II) to form formic acid (III) and the corresponding carboxylic ester (IV); and (b) at least part of the carboxylic ester (IV) formed in step (a) is carbonylated to give the corresponding carboxylic anhydride (V).
Claims11
A process for the joint preparation of formic acid and a carboxylic acid having at least two carbon atoms and/or derivatives thereof, wherein
- (a) a formic ester is transesterified with a carboxylic acid having at least two carbon atoms to form formic acid and the corresponding carboxylic ester;
- and
- (b) at least part of the carboxylic ester formed in step (a) is carbonylated to give the corresponding carboxylic anhydride.
Dependencies are inferred from the claim text.