OVERLAND PARK, Kan.–(BUSINESS WIRE)–Compass Minerals (NYSE: CMP), a leading global provider of essential minerals, today announced the successful, third-party conversion testing of its lithium brine resource into both lithium carbonate and battery-grade lithium hydroxide, representing a significant milestone in its previously announced lithium development project. The company engaged Veolia Energy, an established technology provider, to conduct lithium chloride to lithium hydroxide conversion