SAO PAULO, March 11 (Reuters) - The general superintendency of Brazil's antitrust watchdog CADE has approved without restrictions a deal for China's Chinalco 601600.SS and Rio Tinto RIO.AX to acquire a controlling stake in aluminum maker CBA CBAV3.SA, the country's official gazette showed on Wednesday.
The two firms had announced in January an agreement to buy the CBA stake from conglomerate Grupo Votorantim for 4.69 billion reais ($909.18 million), along with a tender offer for the remaining CBA shares.
($1 = 5.1585 reais)
(Reporting by Isabel Teles; Editing by Gabriel Araujo)
((Isabel.Teles@thomsonreuters.com;))