Process for converting perfluorinated esters to perfluorinated acyl fluorides and/or ketones
AssigneeMinnesota Mining and Manufacturing Company
InventorGeorge G. I. Moore
Life of this patent
Estimating the term…
Abstract
A process for converting perfluorinated carboxylic acid esters to perfluorinated acyl fluorides and/or perfluorinated ketones comprises the step of combining at least one perfluorinated carboxylic acid ester with at least one initiating reagent selected from the group consisting of gaseous, non-hydroxylic nucleophiles; liquid, non-hydroxylic nucleophiles; and mixtures of at least one non-hydroxylic nucleophile (gaseous, liquid, or solid) and at least one solvent which is inert to acylating agents. The process enables the dissociation of even high molecular weight, perfluorinated esters.
Claims24
A process for converting perfluorinated carboxylic acid esters to perfluorinated acyl fluorides and/or perfluorinated ketones comprising the step of combining at least one perfluorinated carboxylic acid ester with at least one initiating reagent selected from the group consisting of gaseous, non-hydroxylic nucleophiles;
- liquid, non-hydroxylic nucleophiles;
- and mixtures of at least one non-hydroxylic nucleophile and at least one solvent which is inert to acylating agents.
A process for converting perfluorinated carboxylic acid esters to perfluorinated acyl fluorides and/or perfluorinated ketones comprising the step of combining at least one perfluorinated carboxylic acid ester with at least one initiating reagent selected from the group consisting of dialkylamines, trialkylamines, carboxamides, alkyl sulfoxides, amine oxides, oxazolidones, pyridines, mixtures thereof, and mixtures of at least one thereof and at least one solvent which is inert to acylating agents.
A process for converting perfluorinated carboxylic acid esters to perfluorinated acyl fluorides and/or perfluorinated ketones comprising the step of combining at least one perfluorinated carboxylic acid ester with at least one initiating reagent selected from the group consisting of mixtures of at least one compound, selected from the group consisting of 1,4-diazabicyclo[2.2.2]octane and the alkali metal, ammonium, alkyl-substituted ammonium, tris(dimethylamino)sulfonium, and quaternary phosphonium salts of fluoride, cyanide, cyanate, iodide, chloride, bromide, acetate, mercaptide, alkoxide, thiocyanate, azide, trimethylsilyl difluoride, bisulfite, and bifluoride anions, and at least one solvent which is inert to acylating agents.
A process for converting perfluorinated carboxylic acid esters to perfluorinated acyl fluorides and/or perfluorinated ketones comprising the step of combining at least one perfluorinated carboxylic acid ester with at least one initiating reagent selected from the group consisting of gaseous non-hydroxylic nucleophiles;
- liquid, non-hydroxylic nucleophiles;
- and mixtures of at least one non-hydroxylic nucleophile and at least one solvent selected from the group consisting of polar, aprotic solvents;
- mixtures of at least one nonpolar, aprotic solvent and at least one phase transfer catalyst;
- mixtures of at least one polar, aprotic solvent and at least one nonpolar, aprotic solvent;
- and mixtures thereof.
A process for converting perfluorinated carboxylic acid esters to perfluorinated acyl fluorides and/or perfluorinated ketones comprising the step of combining at least one perfluorinated carboxylic acid ester with a substoichiometric amount of at least one initiating reagent selected from the group consisting of gaseous, non-hydroxylic nucleophiles liquid, non-hydroxylic nucleophiles;
- and mixtures of at least one non-hydroxylic nucleophile and at least one solvent which is inert to acylating agents.
A process for converting perfluorinated carboxylic acid esters to perfluorinated acyl fluorides and/or perfluorinated ketones comprising the step of combining at least one perfluorinated carboxylic acid ester having at least about six carbon atoms with at least one initiating reagent selected from the group consisting of trimethylamine;
- triethylamine;
- pyridine;
- dimethylformamide;
- mixtures of at least one salt, selected from the group consisting of the potassium, sodium, ammonium, and alkyl-substituted ammonium salts of fluoride and chloride anions, and at least one solvent selected from the group consisting of acetonitrile, diethylene glycol dimethyl ether, and toluene/tetraalkylammonium fluoride;
- and mixtures thereof.
Dependencies are inferred from the claim text.