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US 4,734,535 AGranted
Preparation of aliphatic chlorine compounds
AssigneeBASF SE
InventorsNorbert Greif, Knut Oppenlaender
Life of this patent
Estimating the term…
Abstract
Aliphatic chlorine compounds of the formula X--R.sup.1 --Cl I where R.sup.1 is alkylene which may be interrupted by one or more oxygen atoms and which may be substituted by halogen, alkyl or aryl, and X is hydrogen, chlorine or OR.sup.2, where R.sup.2 is alkyl, cycloalkyl, aryl or aralkyl, are prepared by decarboxylating chloroformic acid esters or diesters at elevated temperatures by decarboxylating in the presence of a quaternary ammonium or phosphonium salt as catalyst.
Claims8
A process for preparing an aliphatic chlorine compound of the formula
- X--R.sup.1 --Cl I
- where R.sup.1 is alkylene which may be interrupted by one or more oxygen atoms and which may be substituted by halogen, alkyl or aryl, and X is hydrogen, chlorine or OR.sup.2, where R.sup.2 is alkyl, cycloalkyl, aryl or aralkyl, by decarboxylating the corresponding chloroformic acid ester or diester at elevated temperatures, which comprises decarboxylating in the presence of a quaternary ammonium or phosphonium salt as catalyst.
Dependencies are inferred from the claim text.