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US 4,399,001 AGranted
Separating off organic iodine compounds from acetaldehyde-free carbonylation products of methanol, methyl acetate and dimethyl ether
AssigneeBASF SE
InventorsHorst Hartmann, Waldhelm Hochstein, Gerd Kaibel, Franz-Josef Mueller
Life of this patent
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Abstract
A process for separating off organic iodine compounds from acetaldehyde-free carbonylation products of methanol, methyl acetate and dimethyl ether by removing the iodine compounds by azeotropic distillation with a hydrocarbon having a boiling point, under atmospheric pressure, of 25-55.degree. C.
Claims8
A process for separating off organic iodine compounds as an impurity from acetaldehyde-free carbonylation products of methanol, methyl acetate and dimethyl ether, which process comprises:
- removing the organic iodine impurity by azeotropic distillation of the acetaldehyde-free carbonylation product with a hydrocarbon having a boiling point, under atmospheric pressure, of 25.degree.-50.degree. C., said distillation being carried out under conditions of temperature and pressure sufficient to obtain substantially all of the organic iodine impurity in the azeotrope distillate fraction and to obtain the remaining carbonylation products in one or more higher boiling fractions.
Dependencies are inferred from the claim text.