JHARSUGUDA: Vedanta is working “actively” for demerger of its key businesses, including aluminium, into separate listed companies and the process is likely to be completed in next nine to 12 months, a top official of the company said. Billionaire Anil Agarwal-owned Vedanta Ltd had last year announced creation of independent verticals through demerger of its metal, power, aluminium, and oil and gas businesses to unlock potential value.