Heavily indebted Tianqi, one of the world's top producers of lithium chemicals used in electric-vehicle batteries, is pocketing a much-needed $1.4 billion from the sale, agreed in December, of 25% in the Greenbushes mine and 49% in the Kwinana processing plant in Western Australia.

The company said in a filing on Monday it had on June 9 received a so-called no objection notification from Australia's Foreign Investment Review Board on the internal transfer of Kwinana to Tianqi Lithium Energy Australia (TLEA), provided this complies with tax regulations.

Given the Australian Taxation Office may need a long time to decide whether the transfer is exempt from capital gains tax, however, Tianqi and Perth-based IGO - which is taking 49% in TLEA - have signed a tax-sharing agreement that will allow them to complete their transaction by June 30, Tianqi said.

Under the agreement, IGO will shoulder 49% of any tax bill up to a stipulated maximum amount, Tianqi said, without giving a value.

(Reporting by Tom Daly; Editing by Matthew Lewis)