NEXT GENERATION ANTI-CAKING: MESO TARTRATE

摘要

Presently Fe(CN)64- is the world standard anti-caking agent for salt. Yet in membrane electrolysis Fe(CN)64- has distinct negative effects since Fe deposits as Fe(OH)3 on or in the membranes increase power consumption and CN is partially transformed into harmful NCl3 that may lead to explosions. The increasing number of membrane electrolyses worldwide enlarges the need for a powerful and effective anti-caking agent without the disadvantages of Fe(CN)64-.This next generation anti-caking agent is Fe - meso Tartrate (Fe-mTA), in short mTA. In this paper the original development and application of mTA is described as anti-caking agent for both chemical transformation salt and road salt. Customer's experience in operations with mTA-salt in large membrane electrolysis plants during the last four years is elucidated as well as practical experience with transport, unloading and storage. Presently optimization is executed to fine-tune the anti-caking properties of mTA further.