Production of phthalic acid dichloride involves reacting phthalic anhydride with phosgene in inert solvent in presence of N,N-dialkylformamide, the phosgene and amide being added continuously or semi-continuously

Production of phthalic acid dichloride involves reacting phthalic anhydride with phosgene in inert solvent in presence of N,N-dialkylformamide, the phosgene and amide being added continuously or semi-continuously

A method for the production of phthalic acid dichloride (I) by reacting phthalic anhydride with phosgene in an inert diluent at 20-150C in presence of a N,N-dialkylformamide (II) involves adding the required amounts of phosgene and (II) continuously or semi-continuously and independently of one anot...

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Bibliographische Detailangaben
Hauptverfasser: STOELTING, JOERN, LANTZSCH, REINHARD
Format: Patent
Sprache:eng ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:A method for the production of phthalic acid dichloride (I) by reacting phthalic anhydride with phosgene in an inert diluent at 20-150C in presence of a N,N-dialkylformamide (II) involves adding the required amounts of phosgene and (II) continuously or semi-continuously and independently of one another. Die Erfindung betrifft ein neues Verfahren zur Herstellung von Phthalsäuredichlorid (Benzol-1,2-dicarbonsäure-dichlorid) aus Phthalsäureanhydrid durch Umsetzung mit Phosgen in Gegenwart eines N,N-Dialkyl-formamids.