Council of Scientific and Industrial Research

Ramachandraiah Gadde

Pushpito Kumar Ghosh

Ashutosh Vasant Bedekar

Jatin Rameshchandra Chunawala

Satish Hariray Mehta

Dipak Balvantrai Shukla

Aditya Shantibhai Mehta

Mirnal Vinodbhai Sheth

Pushhpito Ghosh

Girirajsinh Sabalsinh Gohil

Mahesh Ramaniklal Gandhi

Adimurthy Subbarayappa

Ashok Dayabhai Jethva

Sanjay Shambubhai Vaghela

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.

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

A cost-effective process is described for the preparation of a stable and non-hazardous brominating reagent containing 2:1 stoichiometric ratio of alkali bromide to alkali bromate. The process comprises of reacting alkaline bromine intermediate mixture, obtained from bromine recovery plant, with chlorine gas in the presence of a strong alkali to oxidize the bromide ions to bromate ions. This brominating reagent is useful for the bromination of aromatic compounds by substitutions.

Process for preparation of non-hazardous brominating agent

A highly pure 2,4,4,6-tetrabromo-2,5-cyclohexadienone has been prepared in a single pot, eco-friendly procedure in yields of 91-94% from phenol. In this method, a mixture of alkali/alkaline earth metal bromide and alkali/alkaline earth metal bromate was employed as brominating agent in place of corrosive liquid bromine. The reaction between phenol and the brominating reagent was initiated by the action of a mineral acid or moderately strong organic acid. The crude product was further characterized by standard analytical and spectroscopic methods.

Process for preparing 2,4,4,6-tetrabromo-2,5-cycloyhexadienone

Growing community of inventors

Bhavnagar, India

Ramachandraiah Gadde