Report Highlights

U.S. Activated Bleaching Earth: Market Overview

The U.S. activated bleaching earth market was valued at USD 182 million in 2024 and supplies acid-activated calcium bentonite used to decolourise edible oils, animal fats, and biodiesel and renewable diesel feedstocks. Raw calcium bentonite is mined mainly in Mississippi and Georgia, then acid-treated at plants operated by Oil-Dri Corporation of America and Clariant. Demand concentrates in the Midwest soybean crushing corridor and in Gulf Coast refining capacity, while imports from India fill specialty grades.

Government has been the dominant force in shaping demand, because the Renewable Fuel Standard under Section 211(o) of the Clean Air Act, administered by the U.S. Environmental Protection Agency, forced refiners to expand fats and oils processing. Private producers have led product development, especially high-activity grades for renewable diesel pretreatment. Federal agencies, meanwhile, set the worker exposure and residue disposal rules that define the cost structure of every supplier.

Policy-Driven Growth in U.S. Bleaching Earth

The Renewable Fuel Standard requires obligated parties to retire renewable identification numbers each year, and EPA's June 2025 proposal set 2026 biomass-based diesel volumes at 5.61 billion gallons. Section 45Z of the Internal Revenue Code, created by the Inflation Reduction Act of 2022 and extended through 2029 by the One Big Beautiful Bill Act, pays producers per gallon according to emissions intensity. Higher throughput at pretreatment units raises bleaching earth consumption per gallon processed, so each policy instrument converts directly into clay tonnage.

California's Low Carbon Fuel Standard, administered by the California Air Resources Board under Title 17 of the California Code of Regulations, adds a second demand channel by crediting low-carbon renewable diesel sold into California. Amended carbon-intensity benchmarks took effect in July 2025 and tighten annually. Wider compliance margins encourage renewable diesel plants to run harder on tallow and soybean oil, and every additional barrel processed requires bleaching earth at the pretreatment stage.

Regulatory Barriers and Compliance Costs

OSHA's respirable crystalline silica standard at 29 CFR 1910.1053 sets an 8-hour permissible exposure limit of 50 micrograms per cubic metre for general industry, and clay handling triggers exposure monitoring. Plants must install engineering controls, maintain a written exposure control plan, and fit-test respirators annually. EPA's hazardous waste rules under 40 CFR Part 261 also require characterisation of spent bleaching earth containing residual oil and metals before landfill disposal, adding testing and transport costs for every batch.

Tariffs form the second barrier. Activated clays classified under HTSUS subheading 3802.90 face combined additional duties of 50 percent on Indian-origin goods following 2025 executive orders issued under the International Emergency Economic Powers Act, enforced by U.S. Customs and Border Protection. Suppliers to 45Z-eligible producers must also document feedstock and origin data under Treasury rules, which lengthens qualification cycles for new vendors.

Policy-Created Opportunities in U.S. Bleaching Earth

The USDA Biorefinery Assistance Program, authorised under Section 9003 of the Farm Security and Rural Investment Act of 2002 as amended, offers loan guarantees for advanced biofuel plants. Each guaranteed renewable diesel or sustainable aviation fuel facility creates recurring pretreatment clay demand over its operating life. Suppliers that qualify early for these projects secure multi-year volume commitments before competitors complete certification.

The North American feedstock requirement attached to Section 45Z favours domestic tallow and soybean oil, which in turn favours domestic clay suppliers able to certify origin. Calcium bentonite producers in Mississippi and Georgia can capture share from imported grades by supplying documented, domestically sourced material. Producers that build traceability systems now will hold a compliance advantage through the 2029 credit expiry.

Regulatory and Policy Environment

The primary legislation is Section 211(o) of the Clean Air Act, as amended by the Energy Policy Act of 2005 and implemented through 40 CFR Part 80, Subpart M, administered by the U.S. Environmental Protection Agency. Obligated parties must retire renewable identification numbers annually, and EPA enforces compliance through civil penalties. Section 45Z of the Internal Revenue Code, administered by the Internal Revenue Service and the Treasury Department, requires emissions modelling under the GREET model, with Treasury final regulations expected in 2026 and EPA's final 2026–2027 volume rule expected by the end of 2025.

Compared with regional peers, the U.S. framework is credit-based and market-driven. The European Union's Renewable Energy Directive III, Directive (EU) 2023/2413, sets a binding 29 percent renewable share for transport by 2030, with member-state transposition due on 21 May 2025. Canada's Clean Fuel Regulations under SOR/2022-140 impose a fixed carbon-intensity reduction schedule with tradable credits. The U.S. approach delivers less volume certainty, which transfers demand risk onto bleaching earth suppliers.

Long-Term Policy Outlook for U.S. Bleaching Earth

By 2032, the decisive policy event is the scheduled expiry of Section 45Z on 31 December 2029 unless Congress extends it, which would remove per-gallon credit support from renewable diesel margins. Treasury's final regulations will define how feedstock origin and emissions data are verified, determining which clay suppliers qualify through their customers' supply chains. Market growth through 2032 therefore depends on congressional action before 2029.

Expanded OSHA enforcement of the silica standard and tighter RCRA disposal rules will raise per-tonne compliance costs for processors, favouring larger plants with integrated waste handling. Tariff regimes under IEEPA remain subject to litigation before the U.S. Court of International Trade, and the outcome will determine whether Indian specialty grades retain price competitiveness through 2032.

Market at a Glance

Leading Market Participants

• Clariant
• Oil-Dri Corporation of America
• BASF SE
• Imerys
• Ashapura Group
• Musim Mas
• Honeywell UOP
• Evonik Industries
• Minerals Technologies Inc.
• Taiko Clay Industries