Rare-Earths Producer Molycorp, Rivals Lobby Congress

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Molycorp Inc. and potential rivals in rare-earth mining are competing for advantage as lawmakers seek to revive U.S. production of the minerals used in products from "smart" bombs to wind turbines and mobile phones.

The company, which is preparing to reopen a shuttered mine in California, wants federal loan guarantees to convert the elements into metals, alloys and magnets, Jim Sims, Molycorp’s vice president for public affairs, said in an interview.