Council of Scientific and Industrial Research

Sanjay Kumar Dehury

Lakshmi Kantam Mannepalli

Upasana Bora

Boyapati Manoranjan Choudhary

Mihir Kanti Choudhuri

Siddhartha Sankar Dhar

Boyapati Manoranjan Choudary

Wancydora Kharmawphlang

Mihir Kanti Chaudhuri

Jayashree Nath

Deepa Dey

The present invention provides an improved, economical and environmentally benign process for metal complexes of acetylacetone having the general formula, M(acac)wherein M is a metal cation selected from the group consisting of Fe, Co, Ni, Cu, Zn, Al, Ca, Mg, Mo, Ru, Re, U, Th, Ce, Na, K, Rb, Cs, V, Cr, and Mn etc., n is an integer which corresponds to the electrovalence of M, are obtained by reacting the corresponding metal hydroxide, metal hydrated oxide or metal oxide with a stoichiometric amount of acetylacetone and separating the product.

Process for making metal acetylacetonates

The present invention relates to an economical and environmentally clean process for the preparation of high quality quaternary ammonium tribromides by oxidation of bromide (Br) in an acidic medium by a biomimetic process involving transition metal ion mediated activation of hydrogen peroxide.

Process for preparing quaternary ammonium tribromides

The present invention relates to an economic and environmentally clean process for the preparation of the pyridinium salt of fluorotrioxo-chromate (VI), PFC, having the chemical formula CHNH[CrOF], by direct reaction of stoichiometric amounts of hydrofluoric acid, chromium trioxide and pyridine demonstrating approxomately 100% atom economy.

Process for preparing pyridinium fluorochromate (VI)

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Assam, India

Sanjay Kumar Dehury