3. Extraction processes and industrial cases
Processes differ according to the three main types of resource: nitrates, brines and phosphates.
To extract iodine from caliche, all soluble salts are usually brought into solution in pits or heaps, and more recently in stirred reactors. Iodine can be recovered by combining oxidation (by Cl 2 , H 2 O 2 ) and/or reduction (SO 2 , ) reactions and various I 2 separation techniques (flotation, extraction in kerosene, blowing out process,...
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Extraction processes and industrial cases
Iodine toxicity and environmental protection
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Economic data
Production
It is mainly produced by the mining and petroleum industries (oil and gas). No data are available for recycling. Table
1
shows production trends from 2000 to 2006. In 2006, Chilean nitrates accounted for over 60% of world production. This explains the intense prospecting activity in Chile
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