Production of propionic acid
AssigneeMonsanto Company
InventorDonald E. Morris
Life of this patent
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Abstract
Production of propionic acid and propionic anhydride with the repression of polyketone formation by carboxylating ethylene utilizing a catalyst system essentially composed of an iridium compound in the substantial absence of added halide components.
Claims10
In a process for production of propionic acid, propionic anhydride and mixtures thereof with the repression of polyketones wherein ethylene is reacted, in the absence of hydrogen, with carbon monoxide and at least one member of the group consisting of water, propionic acid and mixtures thereof, at a temperature of 50.degree. to 300.degree.C, the improvement which comprises contacting the said reactants in the presence of a catalyst system consisting essentially of an iridium complex containing at least one ligand selected from the group consisting of
- a tertiary organophosphorus compound of 3 to 90 carbon atoms,
- a tertiary organoarsenic compound of 3 to 90 carbon atoms,
- a tertiary organoantimony compound of 3 to 90 carbon atoms,
- an olefinic compound of 2 to 40 carbon atoms,
- and an organo-diolefinic compound of 2 to 40 carbon atoms
- in the substantial absence of added halide components.
In a process for production of propionic acid, propionic anhydride and mixtures thereof with the repression of polyketones wherein ethylene is reacted, in the absence of hydrogen, with carbon monoxide and at least one member of the group consisting of water, propionic acid, and mixtures thereof, at a temperature of 50.degree. to 300.degree.C, the improvement which comprises contacting the said reactants in the presence of a catalyst system consisting essentially of an iridium complex, containing carbon monoxide, and at least one ligand selected from the group consisting of
- a tertiary organophosphorus compound of 3 to 90 carbon atoms,
- a tertiary organoarsenic compound of 3 to 90 carbon atoms,
- a tertiary organoantimony compound of 3 to 90 carbon atoms,
- an olefinic compound of 2 to 40 carbon atoms,
- and an organo-diolefinic compound of 2 to 40 carbon atoms
- in the substantial absence of added halide components.
Dependencies are inferred from the claim text.