Process for the preparation of stable iodate-exchanged synthetic hydrotalcite with zero effluent discharge

Abstract

The present invention relates to a process for the preparation of stable iodate-exchanged hydrotalcite with zero effluent discharge. The iodate-exchanged hydrotalcite produced is useful as iodizing agent. The invention further relates to utilization of alkaline effluent generated in the process of ion exchange of iodate into SHT so as to fully recycle the residual iodate anion and also utilize the alkali generated in the process for production of additional quantities of iodate through reaction with iodine crystals followed by electrochemical oxidation to obtain pure aqueous solution of iodate salt which can be reused for preparation of the stable iodizing agent. The process gives zero effluent discharge hence economical.

Description

technical field

[0001] The present invention relates to a process for the preparation of stable iodate exchanged synthetic hydrotalcites with zero effluent discharge.

[0002] More specifically, the present invention relates to a process for regenerating iodate from elemental iodine using the alkaline effluent produced during said iodate exchange, making this process zero effluent and thus more economical. Background technique

[0003] Iodine is a very important trace element necessary for the biosynthesis of thyroid hormones. Iodine is needed to develop and maintain a healthy body. There are known iodine deficiency disorders such as goiter and cretinism. Table salt was chosen as the iodine-providing vehicle due to its consistent consumption and availability to all segments of the population independent of social or economic status. In order to provide sufficient iodine to consumers while avoiding unnecessary overdose of iodized salt in salt (which is often done to make u...