Process for extracting iodine from kelp

Process for extracting iodine from kelp

The disclosed method to extract I2 from kelp comprises: with fresh kelp as material, cutting up, adding 200wt% water to dip for 30-50min; putting soak into pond, adjusting pH value with alkali, while filling gas to stir and then filter to obtain the clear liquid with I2 and mannitol; acidifying and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WANG QINGYIN, LI ZHANGQING, BIAN YONGPING, LENG KAILIANG
Format: Patent
Sprache:chi ; eng
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Beschreibung
Zusammenfassung:The disclosed method to extract I2 from kelp comprises: with fresh kelp as material, cutting up, adding 200wt% water to dip for 30-50min; putting soak into pond, adjusting pH value with alkali, while filling gas to stir and then filter to obtain the clear liquid with I2 and mannitol; acidifying and oxidizing to obtain dissociative I2 and then adsorb with basic anion exchange resin; desorbing the I2 on resin with Na2S2O3; adding strong H2SO4 and KClO3 to separate out coarse I2; cleaning, and refining with 25wt% strong H2SO4 at 140Deg to obtain the refined iodine. This invention reduces cost and source.