Direct catalytic oxidative carbonylation of lower alkanes to acids
AssigneeGas Research Institute
InventorsAyusman Sen, Minren Lin
Life of this patent
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Abstract
A process for direct oxidative carbonylation of lower alkanes to acids having one greater carbon atom. The process uses a metal salt catalyst promoted by halide ions and/or a metal with oxygen as the oxidant in an aqueous medium. The process is especially effective for conversion of methane to acetic acid.
Claims20
A process for direct catalytic oxidative carbonylation of lower alkanes to acids having one greater carbon atom than said lower alkane, comprising:
- contacting said lower alkane with carbon monoxide and oxygen in an aqueous medium and in the presence of a metal salt catalyst wherein said metal is selected from the group consisting of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au and mixtures thereof and a promoter selected from the group consisting of iodide, bromide and chloride ions, metallic metals Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, and mixtures thereof.
A process for direct catalytic oxidative carbonylation of lower alkane comprising principally methane to acids comprising principally acetic acid, comprising:
- contacting said lower alkane with carbon monoxide and oxygen in an aqueous medium in the presence of (1) a metal salt catalyst soluble in said aqueous medium wherein said metal comprises a metal selected from the group consisting of Rh, Ir, Pd, Ru and mixtures thereof and (2) a promoter selected from the group consisting of iodide, bromide, chloride ions and mixtures thereof, said contacting performed at temperatures of about 50.degree. to about 200.degree. C.
A process for conversion of methane to acetic acid comprising:
- contacting methane with carbon monoxide and oxygen in an aqueous medium in the presence of RhCl.sub.3 catalyst and a promoter selected from the group consisting of iodide, bromide, chloride ions and mixtures thereof at temperature of about 80.degree. to about 160.degree. C., said carbon monoxide being supplied in excess of said oxygen on a molar basis.
Dependencies are inferred from the claim text.