Transvinylation process for the preparation of thermally labile vinyl compounds and for vinyl compounds prepared from thermally labile acids
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorRex E. Murray
Life of this patent
Estimating the term…
Abstract
A process for the transvinylation of a vinyl derivative of a Bronsted acid with a different Bronsted acid which comprises providing a liquid phase mixture containing said vinyl derivative and said Bronsted acid in the presence of a ruthenium compound at a temperature at which transvinylation occurs and recovering as a product of transvinylation the vinyl derivative of the different Bronsted acid. The process is most favorably employed using carboxylic acids to make vinyl esters of carboxylic acids.
Claims54
A process for the preparation of a vinyl derivative of a thermally labile Bronsted acid by transvinylation comprising reacting in a reactor a vinyl derivative of a first Bronsted acid with a thermally labile Bronsted acid in the presence of a catalyst, said catalyst comprising a ruthenium compound capable of catalyzing the transvinylation reaction, said vinyl derivative of said first Bronsted acid having a boiling point in the range of from about equal to the boiling point of said thermally labile Bronsted acid to greater than the boiling point of the thermally labile Bronsted acid and higher than the boiling point of the vinyl derivative of the thermally labile Bronsted acid, feeding said thermally labile Bronsted acid to the reactor during transvinylation at a rate to maintain the concentration of thermally labile Bronsted acid in the reactor at less than about 40 mole %, and removing said vinyl derivative of the thermally labile Bronsted acid from the reactor as the transvinylation reaction progresses.
The process of cliam 2 wherein said thermally labile Bronsted acid is a hydroxyl derivative of benzoic acid.
Dependencies are inferred from the claim text.