Kazakh bank BTA has agreed a preliminary term sheet with creditors to restructure $11.2 billion of debt, the bank said on Wednesday, triggering a rally in its heavily-discounted bonds.

Kazakh sovereign wealth fund Samruk-Kazyna, the bank's majority shareholder, agreed to convert its deposits into equity and issue a $1.592 billion interest-bearing subordinated loan.

Creditors will exchange their interests for a package of new notes and cash, BTA said in a statement. The new notes will have a nominal amount of $750 million with a semi-annual coupon of 5.5 percent per year and maturity in 2022.

Senior noteholders will also receive $957.8 million of cash and $88.8 million of new notes. Recovery unit holders will receive $660.2 million in cash and $61.2 million of new notes.

"We hope to complete the restructuring by year-end 2012," BTA Chief Executive Yerik Balapanov said in a statement.

All creditors had agreed to the non-binding term sheet, with the exception of Nomura International, BTA said.

BTA's $2.1 billion 2018 bond jumped at least 5 cents on the news to more than 30 cents on the dollar.

(Reporting by Maria Gordeeva; Additional reporting by Carolyn Cohn; Writing by Robin Paxton; Editing by Douglas Busvine)