Council of Scientific and Industrial Research

Babulal Surabhai Makwana

Pushpito Kumar Ghosh

Sreekumaran Thampy

Vadakke Puthoor Mohandas

Rahul Jasvantrai Sanghavi

Sumesh Chandra Upadhyay

Girish Rajanikant Desale

Milan Dinda

Sandhya Chandrikaprasad Mishra

Vinod Kumar Shahi

Uma Chatterjee

Imran Pancha

Ruma Pal

Saroj Sharma

Soumyadeb Ghosh

Ramkrishna Sen

Chiragkumar Rameshbhai Sharma

Divesh Narayan Srivastava

Vaibhav Kulshreshtha

The present invention describes the process of preparation of inter-polymer film of p-methylstyrene-co-divinylbenzene and its conversion into anion exchange membrane through a greener route which dispenses with the use of chloromethyl ether. The membrane with polyethylene binder is shown to have equivalent or even superior performance to anion exchange membrane prepared from styrene-co-divinylbenzene/polyethylene through chloromethyl ether route.

Process for the preparation of anion exchange membrane

The present invention relates to natural crude salt formulations arid their cost-effective preparation. In particular, the invention discloses the fractionation of seawater into three fractions which can thereafter be suitably combined to reconstitute seawater in its pristine form for its various applications such as growth of marine microbes, flora and fauna in a marine environment, especially where such environments have to be created in locations far removed from the sea and/or where there is a requirement to modify the composition of seawater to better its performance. The fractions can also be blended appropriately to exclude the major constituent, namely sodium chloride, and thereby be useful for mineralization/re-mineralization of waters which are deficient in mineral nutrients such as calcium, magnesium, potassium, sulphate and bicarbonate including rain water and desalinated waters obtained through thermal/RO desalination. The invention can be practiced most cost-effectively in solar salt works operated on sea brine.

Process for the preparation of natural salt formulations for seawater substitution, mineral fortification

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Bhavnagar, India

Babulal Surabhai Makwana