Singapore: The hunt for lost billions - failed Hin Leong's owners face asset claims

* Court to hear liquidators move to freeze family assets * Banks face billions in losses after Hin Leong winds up

SINGAPORE, April 2 (Reuters): Stung by the collapse of Asia's top independent oil trading firm, some global banks have teamed up to seek the personal assets of the family behind Hin Leong Trading, which has left creditors on the hook for billions of dollars.