Back to results
US 4,908,477 AGranted
Removal of organic iodine compounds from carbonylation products of methanol methyl acetate and dimethyl ether
AssigneeBASF SE
InventorsHorst Hartmann, Waldhelm Hochstein, Gerd Kaibel, Franz-Josef Mueller
Life of this patent
Estimating the term…
Abstract
Organic iodine compounds are separated from carbonylation products of methanol, methyl acetate and dimethyl ether and from mixtures of such carbonylation products by a process wherein the iodine compounds are removed by liquid phase extraction with a non-aromatic hydrocarbon.
Claims5
A process for purifying a mixture of liquid carbonylation products formed in the carbonylation of methanol, methylacetate and/or dimethyl ether in the presence of iodides by removing methyl iodide from said products, which process comprises:
- passing a non-aromatic hydrocarbon of 4-14 carbon atoms in countercurrent direction through the liquid carbonylation mixture to extract methyl iodide from the mixture of carbonylation products in from 1 to 10 extraction stages and thus substantially lowering the amount of methyl iodide in such products.
Dependencies are inferred from the claim text.