Patent ID: 9567438
Date: 2017-02-14
CPC Classifications: B01J,C08G

Claim:
1. A method for separating iodine of at least one di-iodized aromatic compound in accordance with the general formula II (where A represents a bivalent aromatic radical) and/or mixtures thereof from material mixtures comprising iodine and/or the at least one di-iodized aromatic compound in accordance with the general formula II characterized in that a) a first part of the iodine, the at least one di-iodized aromatic compound in accordance with the general formula II, and/or the mixture thereof is/are separated at a pressure which is equal to or larger than the pressure which is present at the triple point of iodine; and b) a second part of the iodine, the di-iodized aromatic compound in accordance with the general formula II, and/or the mixture thereof is/are separated at a pressure which is smaller than the pressure which is present at the triple point of iodine; wherein in both steps a) and b) the material mixture respectively has temperatures at which at least iodine is present in a gaseous state at the said pressures.