Process for the production of ketene dimers
AssigneeEka Nobel AB
InventorPaul S. McIntosh
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Abstract
Production of ketene dimers from fatty acid halides by reaction with tertiary amines whereby the tertiary amine is used both as a reactant and as a solvent/diluent. In the process at least 1.15 moles of tertiary amine is used per mole of fatty acid halide and the process is carried out in the substantial absence of an additional solvent, whereby the produced ketene dimer is obtained by stripping of the tertiary amine followed by separation of formed crystals of tertiary amine hydrogen halide by acid extraction.
Claims14
A process for the production of a ketene dimer from a fatty acid halide by reaction with a tertiary amine, comprising the steps of:
- (a) reacting a fatty acid halide and a tertiary amine in the substantial absence of inert solvent and in a molar ratio of tertiary amine to fatty acid halide of at least 1.15:1, thereby forming a reaction mixture comprising ketene dimer, tertiary amine hydrogen halide and unreacted tertiary amine;
- (b) stripping unreacted tertiary amine from the reaction mixture;
- and
- (c) separating crystals of tertiary amine hydrogen halide from the ketene dimer by acid extraction of the mixture at step (6).
Dependencies are inferred from the claim text.