By Rogerio Jelmayer And Luciana Magalhaes 

SÃO PAULO--Some major creditors of Brazilian power company Eneva SA are pushing for a $791-million debt-for-equity swap in the troubled company once owned by failed tycoon Eike Batista, with the aim of bringing the firm out of bankruptcy protection, according to people familiar with the proposal.

The debt-for-equity deal, valued at about 2.4 billion reais, is part of a 3 billion reais capital plan to be discussed at a creditors assembly scheduled for April 30. Large creditors, mainly banks, are already eyeing an eventual sale of their stakes in the firm, the people said.

If the plan is approved, Brazilian bank BTG Pactual will likely emerge as the utility's main shareholder, with a 40% stake. Two other lenders, Itau BBA and Citibank, will also become relevant shareholders. Germany's E. ON. SE, which currently holds a 43% interest in the company, will see its stake diluted to around 10% to 20%, while Mr. Batista's interest will drop to around 5% of the restructured company from around 20% currently, one of the people said.

Mr. Batista couldn't be reached for comment.

A spokeswoman for E.ON confirmed that E.ON's stake in Eneva would shrink if the proposed recovery plan is approved, but couldn't provide exact figures.

Formerly known as MPX Energia SA, the company was founded in 2001 by Mr. Batista and is another casualty of his crumbled industrial empire. The Brazilian businessman sold a majority stake in the utility to E. ON SE in 2013, but maintained co-control of Eneva, a power generation and trading company, with businesses in natural gas exploration and production.

Eneva filed for bankruptcy protection last December for its holding company Eneva S.A, and Eneva Participações units, after the firm's lenders refused to renew an accord to refinance its debt. Seven thermal electricity plants operated by Eneva weren't included in the BRL2.4 billion petition.

Eneva's total debt, including project finance to some power plants, is around 5 billion reais, according to the company's 2014 financial results.

The company owes around 1 billion reais to BTG Pactual; 707 million reais to Banco Itau BBA, the investment arm of Itau Unibanco; and 387.9 million reais to Citibank, according to Eneva. The financial institutions declined to comment.

While the creditors will likely soon become shareholders in Eneva, some are already making plans to put their stakes up for sale, according to a person familiar with the talks who didn't unveil a potential price for the sale nor the potential buyers.

They "just want to save the company from bankruptcy," the person said.

Eneva is the fourth company founded by Mr. Batista to seek bankruptcy protection, including his flagship oil firm, Oleo e Gas Participações, whose failure sunk his other holdings.

Once Brazil's richest man, Mr. Batista has been charged with insider trading and other financial crimes related to the meltdown. His criminal trial in a Rio de Janeiro court was halted in March after the judge in charge of the case was accused of alleged wrongdoing. A new judge has been appointed, but it could take months for proceedings to resume.

Mr. Batista has previously denied the accusations against him.

Friedrich Geiger contributed to this article.

Write to Rogerio Jelmayer at rogerio.jelmayer@wsj.com and Luciana Magalhaes at Luciana.Magalhaes@dowjones.com

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