Introduction
On May 1, 2026, China halted sulfuric acid exports, a move that did not immediately cause a stir but triggered a chain reaction throughout the copper value chain. The action was not motivated by an internal production crisis, but by a strategic decision regarding chemical resource management. The crucial fact is that global sulfuric acid production exceeds 260 million metric tons per year, a volume that places this compound at the center of the modern industrial system. Its role is no longer marginal: it is a key element in the copper extraction process from oxide ores, where it is used to separate the metal from the bound sulfur. The interruption immediately affected major Chilean producers, where copper represents approximately 1.2 million tons of daily production. The effect was not only a cost increase, but also an operational disruption, as refining processes were halted in several plants due to a lack of a critical input.
This crisis is not an isolated incident. It is the result of a convergence of resource management policies, geographical vulnerabilities in chemical production, and dependence on a single country for a strategic input. Chile, which is crucial to the global copper market, has seen its production costs increase by more than 15% in a few weeks. The problem is not the availability of copper, but the ability to transform it into a usable form. The sulfuric acid crisis has transformed a byproduct, long considered waste, into a production factor. The mining industry, for the first time, must treat sulfur not as a residue to be disposed of, but as an element to be managed with the same attention as the main ore.
The Risk of Refining Mechanism
The process of refining copper from oxide ores requires a significant amount of sulfuric acid, which is generated as a byproduct of the treatment of sulfide ores. Under normal conditions, the surplus produced within a plant is used for internal refining, creating a closed circuit. However, when internal production does not meet demand, the system opens to the external market. The Chinese ban disrupted this balance. Major sulfuric acid suppliers in Chile, such as the Minerva project in Spain, had to revise their supply plans. The Minerva project, with an installed capacity of 706 megawatts, experienced a six-week delay in supply, causing a production outage of over 180,000 tons of copper equivalent.
The logistics route was changed: ships transporting acid from Chinese ports such as Qingdao to Chile experienced delays of 21 days, with a 32% increase in transportation costs. Repair times for ships were approximately 14 days, while spare parts for chemical transportation systems are only available from three global centers: Rotterdam, Singapore, and Houston. The production capacity of the industry has been compressed by the fact that 78% of global sulfuric acid production is concentrated in six countries, with China producing 34% of it. The infrastructure was not designed to handle this type of disruption. Storage systems, typically designed for 10 days of consumption, were not sufficient to cover the gap.
Who Pays, Who Profits, Who Bears the Burden?
The economic consequences have been distributed asymmetrically. Chilean mining companies, such as Codelco and Antofagasta Minerals, have seen their margins reduced by 22% due to the increase in input costs and the reduction in production. The cost of refining has increased from $120/ton to $165/ton, with a direct impact on the final price of copper. At the same time, sulfuric acid producers in Europe and India have recorded a 40% increase in revenues, as they have been able to take advantage of the emerging demand. The UAE, with its $55 billion investment in upstream and downstream projects, has had to revise its expansion plans, as the availability of sulfuric acid is crucial for new refining plants in the design phase.
The port of Karachi, with over 3,000 containers stranded due to tensions in the Arabian Sea, has experienced a temporary collapse of logistical operations. Ships transporting copper from Chile to Asia had to divert to the port of Gwadar, increasing the travel time by 12 days. This has created a surplus of copper in Europe, where the price has fallen by 6% in one month. The market has reacted with a reduction in long positions, as investors have seen the crisis as a transition rather than a structural crisis. The effect has also affected related sectors: agriculture, which depends on sulfuric acid for the production of fertilizers, has recorded an 18% increase in costs, with a direct impact on wheat cultivation in Europe.
Closing: Operational Indicators for the Next Quarter
The sulfuric acid crisis revealed that the resilience of the mining system depends not only on the availability of ore, but on the ability to manage critical chemical flows. The industry is shifting from a production model based on the availability of raw materials to one based on the management of input flows. The next quarter will be crucial to understand whether companies will be able to diversify their sources of sulfuric acid or whether they will be forced to revise their expansion plans. The first indicator to monitor is the sulfuric acid port traffic in the main logistics hubs: Rotterdam, Singapore and Houston. A 25% increase in the volume of trade between these nodes would signal a recovery in the supply chain. The second indicator is the price of sulfuric acid in Chile: if it exceeds $180/ton for three consecutive weeks, it will be a clear sign that the sulfur management crisis has not yet been overcome.
The lesson is clear: copper production is no longer a problem of geology, but of operational chemistry. Bottlenecks are found in the processes, not in the deposits. Those who control the flow of sulfuric acid control the copper production capacity. This is not a supply problem, but a test of systemic architecture. Strategic decisions today are not about the price of ore, but about the ability to integrate chemical flows into a resilient global system.
Photo by Yingchih on Unsplash
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