Council of Scientific and Industrial Research

Venkata Rama Krishna Sarma Susarla

Pushpito Kumar Ghosh

Rahul Jasvantrai Sanghavi

Gadde Ramachandraiah

Indrajit Mukhopadhyay

Abdulhamid Usmanbhai Hamidani

Puthoor Mohandas Vadakke

Sanjay Shambhubhai Vaghela

The process of the invention deals with significant improvements in salt purity and whiteness brought about through treatment of brine with alum prior to charging into crystallizers for solar salt production. The improvements realized are partly on account of elimination of suspended impurities like gypsum and clayey matter in the brine, which may otherwise be carried along with the brine in the crystallizer and finally end up in the salt, and partly due to the improved crystal size and morphology that minimizes embedded impurities in the salt. Rain washing of the heaped salt has resulted in a salt with greatly reduced calcium and sulphate impurity levels hitherto not achieved in solar salt production. Alum treatment by the process of the invention requires no additional time or infrastructure and the cost of the treatment works out to &#x3c;3 U.S. cents per ton of salt. The process can be implemented in any solar salt works.

Process for the preparation of solar salt having high purity and whiteness

The present invention relates to a process for electrochemical oxidation of bromide to bromine, more particularly to oxidation of bromide ions in brine, bittern and effluents using an indigenous cation exchange membrane flow cell.

Process for electrochemical oxidation of bromide to bromine

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Gujarat, India

Venkata Rama Krishna Sarma Susarla