METHOD FOR PRODUCTION OF CRYSTALLINE IODINE AND DEVICE FOR ITS REALISATION Russian patent published in 2015 - IPC C07B7/14 C07B7/13 

FIELD: chemistry.

SUBSTANCE: method for production of crystalline iodine of reactive qualifications, which includes extraction of iodine from solutions to produce an iodine plaste, dehydration of iodine paste and sublimation of iodine. Dehydration of iodine-paste is carried out by evaporation of water at the first stage of the process of iodine sublimation, prior to sublimation sodium carbonate is added into the iodine-paste in the amount providing for pH of water condensate of at least 4.0, the process of sublimation of dehydrated iodine is carried out at the temperature of iodine vapours of 114-184°C, and partial pressure of iodine vapours in the iodine-water mixture prior to desublimation is reduced by dissolution with air to the pressure of saturated vapours of iodine in a triple point. The device for production of crystalline iodine of reactive qualifications includes an iodine evaporator, an iodine condenser with a receiver of finished product, a trap for off-gases and a tail fan. The iodine condenser is made from elastic film stretched onto a carcass, the inner space of the condenser is under vacuum, which prevents release of iodine vapours, at the same time iodine receiver is simultaneously a container for finished product.

EFFECT: increased quality of finished product, simplified and cheaper technological process and increased efficiency of the device.