Sulfuric acid

One of the world's largest oil and gas companies; major US and global sulfur producer as a Claus Process refinery byproduct. Key US refining locations: Baytown, Texas (largest US refinery complex); Baton Rouge, Louisiana; Beaumont, Texas. Also major international refiner (Antwerp, Rotterdam). USGS listed as one of leading US recovered sulfur producers. Also holds 25% of Tengizchevroil (TCO) in Kazakhstan, making it indirectly a significant producer of high-sulfur crude and associated sulfur. Acquired Pioneer Natural Resources 2024 (~$60B), largest US oil deal since Exxon-Mobil merger.

Joint venture operating the Tengiz and Korolevskoye oilfields in Kazakhstan: Chevron (50%), ExxonMobil (25%), Kazmunaigaz (20%), Lukoil (5%). Tengiz crude oil has up to 17% sulfur content — among the highest of any major oilfield globally. Sulfur accumulation at Tengiz became a major environmental issue: a $71M fine was levied in 2007 for sulfur storage violations. Kazakhstan exported $199M worth of sulfur in Q1 2022 alone (+263% YoY). TCO exports oil (and associated sulfur) via the Caspian Pipeline Consortium (CPC) to Novorossiysk on the Black Sea — a single-pipeline dependency. CPC terminal damaged in March 2022, disrupting Kazakhstan exports. Tengiz fire (January 2026) caused force majeure.

One of Canada's largest oil and gas producers; major oil sands operator (Horizon Oil Sands upgrader, Athabasca Oil Sands Project). Produces elemental sulfur as mandatory byproduct of bitumen upgrading. CNRL's Horizon upgrader processes high-sulfur bitumen; sulfur is formed into blocks/prills and stockpiled or shipped. Canada's oil sands produce ~3M MT/year marketable sulfur; CNRL, Suncor, and Cenovus are the primary contributors. CNRL also operator of largest oil sands project (Jackfish thermal in-situ SAGD operations).