Sulfuric Acid and Hydrochloric Acid (BMR/PMR leaching)

European integrated copper group (SDAX: NDA, HQ Hamburg, Germany); world's largest copper recycler and one of Europe's largest copper smelters. After the September 2024 sale of its Buffalo, NY flat-rolled products site to Wieland, Aurubis exited the U.S. connector-strip market to concentrate on primary copper production, recycling, and multimetal recovery. Aurubis Hamburg remains a world-scale refinery (1M+ MT/year cathode output) and continues to supply copper cathode feedstock to strip rollers including Wieland's European facilities. Aurubis Pirdop (Bulgaria) is its primary copper smelter. The company also operates secondary smelters in Belgium (Lünen) and the UK (Swansea). Prior to divestiture, Aurubis Buffalo produced copper and copper alloy strip for electronic connectors, heat exchangers, architectural products, and electrical goods.

Swedish metals and mining company. Revenue ~SEK 80B (2024). Operates Kokkola zinc smelter (Finland, ~315K MT/yr — largest in Europe) and Odda smelter (Norway, ~200K MT/yr). Also mines copper, gold, silver in Scandinavia. Key European galvanizing-grade zinc supplier.

US chlor-alkali and VCM producer (NYSE: OLN, HQ Stamford CT; ~$6B revenue); the largest US chlorine producer and a major feedstock supplier to the PVC resin industry. Olin does not directly produce PVC resin but produces the chlorine and vinyl chloride monomer (VCM) that PVC resin manufacturers (Westlake, Shintech, OxyChem) depend on. Olin's chlor-alkali operations in Freeport TX (the largest chlorine plant in the US), McIntosh AL, Niagara Falls NY, and other sites collectively make Olin the critical upstream enabler of the US PVC supply chain. Olin also owns Winchester ammunition — meaning the same company that produces the chlorine input for PVC pipe also manufactures rifle and shotgun ammunition, a striking dual-use combination under one NYSE ticker. Olin's chlorine pricing directly sets the economics for US PVC resin production.

Wholly owned chemical subsidiary of Occidental Petroleum (NYSE: OXY, HQ Dallas TX); one of the largest US PVC resin manufacturers, primarily from the Battleground Manufacturing Complex in La Marque (near Texas City), Texas. OxyChem is also one of the largest US chlorine and caustic soda (chlor-alkali) producers, operating in Texas, Louisiana, and Tennessee. OxyChem's PVC resin production is vertically integrated with its chlor-alkali operations — it produces its own chlorine and VCM. The Battleground complex sits on the Houston Ship Channel corridor, approximately 25 miles southeast of Houston, within the densest concentration of US chemical manufacturing. OxyChem's parent Occidental Petroleum carries significant upstream oil and gas exposure, creating financial linkage between crude oil prices and OxyChem's capital spending priorities for chlor-alkali and PVC assets.

Major US merchant sulfuric acid producer; 1,400+ employees; 17 manufacturing plants and multiple distribution facilities across US, Europe, Canada, and Asia. Founded 1945 in Detroit. Key facilities: Chicago, IL (H2SO4 production); Gent, Belgium (300 MT/day capacity, recently upgraded converter). Primarily a merchant H2SO4 distributor and producer — supplies industrial, chemical, and fertilizer customers who do not produce their own acid. Also produces oleum, battery acid, and spent acid regeneration services.

World's largest US potash and phosphate producer. Esterhazy K1 and K2 mines (Saskatchewan) began experiencing managed brine inflows in 1985; managed for decades until Mosaic made the decisive choice to build the K3 underground mine (announced 2009, commissioned 2022) to replace K1/K2. K1/K2 closed 2021. K3 at Esterhazy is now the world's largest operating potash mine. Also operates Colonsay SK mine (conventional underground). The Esterhazy flooding saga represents the most consequential water-management incident in Saskatchewan potash history, requiring a $4B+ replacement mine investment.

American petrochemical and building products company (NYSE: WLK, HQ Houston TX; ~$14B revenue; Chao family controlled); major US caustic soda producer via its chlor-alkali operations (including former Axiall/PolyOne chlor-alkali assets acquired 2016). Westlake produces NaOH for pulp/paper, aluminum smelting, and chemical applications alongside chlorine for PVC production. Westlake's Houston TX headquarters and Texas/Louisiana Gulf Coast chlor-alkali operations were significantly disrupted by February 2021's Winter Storm Uri — contributing to the 28% US chlor-alkali capacity outage that drove NaOH prices from ~$280/tonne to over $600/tonne. Westlake is the world's largest PVC pipe manufacturer (through its GENOVA Products, Charlotte Pipe, and other brands) — the same company that makes PVC water supply pipes in every new US home also makes the caustic soda in the kraft pulping liquor producing the cardboard that those pipes are shipped in.