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Tag: United States

Copper output begins at Rio Tinto-backed project

Gunnison has started producing pure copper cathodes at its Johnson Camp Mine (JCM) in southeast Arizona, United States, from a solvent extraction-electrowinning (SX-EW) circuit and using leaching technology from Rio Tinto-owned Nuton. As well as giving Gunnison exclusive rights to deploy the proprietary process on run-of-mine ore, Nuton is a financial partner of the Phoenix-headquartered mine developer which has restarted copper production at past-producing JCM. The company’s next goal is to ramp-up to nameplate plant capacity of 25 million lbs/year (11,300 t/a) of finished copper.

US tariff pause brings relief to fertilizer exporters

President Donald Trump delayed his ‘liberation day” tariffs by three months on 9th April, while simultaneously ramping up levies on China. In this latest twist to the on-off US tariffs saga, the Trump administration’s 90-day pause on additional duties should provide international suppliers to the world’s biggest fertilizer market with some respite – for now. With the exception of China, the US will now cut back its so-called ‘reciprocal tariffs’ to 10% for the duration of a three-month suspension period. The European Union’s tariff is now halved to 10%, for example, with the trade bloc also pausing its trade countermeasures against the US.

Cornerstone sells sulphuric acid operations

Cornerstone Chemical Company has sold its sulphuric acid operations to Ecovyst, a global provider of advanced materials, specialty catalysts, sulphuric acid and regeneration services based in Malvern, Pennsylvania. Ecovyst's business structure includes two core business units: Advanced Materials and Catalysts (AM&C) and Ecoservices. Ecovyst more than 900 employees throughout its 12 facilities across multiple locations worldwide and its Ecoservices division is a North American provider of sulphuric acid and sulphuric acid regeneration services.