An environmentally friendly synthesis of tetrabutylammonium tribromide (C4H9)4NBr3 (nBu4NBr3, TBATB), an efficient brominating agent for organic substrates. \ Inventors: Upasana Bora, Mihir K.Chaudhuri, Abu T. Khan and Bhisma K. Patel, Patent Application No. 28/CAL/2000 of 19th January, 2000.
A Clean process for the preparation of alky and aryl isothiocyanates. Inventors: Bhisma K. Patel and Jayashree Nath Indian Pat. Appl. (2010), IN 2008KO02138 A 20100618.
Process for the preparation of carbodiimides by dehydrosulfurization of thioureas. Bhisma K. Patel, Abdur Rezzak Ali and Harisadhan Ghosh (998/KOL/2009 of 27th November, 2009).