Carbon Black Pyrolysis Tire Recycling 2026 — PatSnap Eureka
Carbon Black Pyrolysis & Tire Recycling: The rCB Innovation Map
Recovered carbon black (rCB) from end-of-life tire pyrolysis has accelerated from niche research to commercial-scale deployment. This report maps the patent and literature landscape from 1978–2025 — covering reactor design, char upgrading, surface activation, and the competitive assignee landscape across 14+ global players.
What Is Recovered Carbon Black — and Why Does It Matter?
Recovered carbon black (rCB) — also called pyrolytic carbon black (CBp) or regenerated carbon black — is the solid fraction obtained when end-of-life tires are thermally decomposed in the absence of oxygen (pyrolysis). With over 1.5–2 billion tires produced annually and mounting regulatory pressure on landfilling, rCB technology has accelerated from niche research to commercial-scale deployment. Tires contain approximately 25–35% carbon black by weight, making rCB recovery a high-value proposition within a circular economy framework.
The core process involves shredding tires into manageable feedstock, pyrolyzing rubber in an inert or oxygen-deficient atmosphere (typically 450–700°C), and recovering the solid char alongside liquid oil and non-condensable gas fractions. The solid char, however, contains inorganic ash (10–15 wt%, primarily ZnO and ZnS), sulfur compounds (1–3 wt%), and carbonaceous deposits — collectively degrading surface reactivity and limiting direct substitution for furnace-grade virgin carbon black. Post-processing and upgrading of this char is the central innovation battleground in the patent dataset spanning 1978–2025.
Key sub-domains include reactor design and continuous processing, char refining and demineralization, surface activation and reactivation, pelletizing and granulation, and application engineering into tires, asphalt, textiles, and energy storage. The PatSnap Analytics platform tracks this evolving competitive landscape in real time. External bodies such as US EPA and ETRMA document the regulatory pressure driving end-of-life tire management globally.
Four Decades of rCB Patent Activity: From Foundational Process to Commercial Maturity
The patent landscape spans 1978–2025 across four distinct generational clusters, each reflecting a shift in technical focus and commercial ambition.
Foundational Pyrolysis-to-Carbon-Black Framework
The earliest filings date to 1978–1981, with foundational process patents from Intenco Inc. (US/GB, 1979–1981) establishing the fundamental pyrolysis-to-carbon-black recovery framework. These early patents recognized that 25–35% of a used tire’s weight consists of recoverable carbon black and described anaerobic thermal decomposition, vapor phase separation, and solid fraction recovery.
Intenco Inc. · 4 records · US/WO/GBControlled Pyrolysis & Continuous Processing Systems
SES IP AB (Sweden, 2001–2008) introduced controlled pyrolysis gas recirculation to improve process consistency. Berdeko Technologies Inc. (US/CA/WO, 2010–2012) advanced continuous anaerobic pyrolysis with integrated magnetic separation and milling to 325-mesh particle sizes at 450–550°C — generating pyrolytic carbon black for re-use in rubber polymerization.
SES IP AB · Berdeko · Continuous processingDownstream Applications & OEM Entry
Wong, Wing-Yam filed a multi-jurisdiction patent family (WO/US/CA/AU/EP/IN, 2013–2018) on using pyrolytic oil as a manufacturing feedstock for virgin carbon black — bridging pyrolysis outputs with primary carbon black production. Bridgestone Corporation (EP, 2017) entered with a focus on surface reactivity enhancement for tire compound applications, signalling OEM-level qualification interest.
Wong Wing-Yam · Bridgestone · Oil-to-CB integrationCommercial Maturation: Quality Certification & Circular Economy
The most active patent filing cluster in this dataset. Bolder Industries (US/CA/AU/WO, 2020–2024) filed extensively on pelletizing systems; T.E.C. S.R.L. (Italy, 2021–2025) built a multi-jurisdiction portfolio on ecological purification and surface activation; BASF SE (EP, pending 2025) entered with selective rubber part pyrolysis. The most recent filings signal convergence toward quality-certified, tire-to-tire circular economy applications.
T.E.C. · Bolder · BASF · LD Carbon · 2020–2025Assignee Filing Activity & Technology Cluster Distribution
Patent record counts by top assignees and distribution across the four core technology clusters, derived from the 1978–2025 dataset.
Top Assignees by Patent Records
T.E.C. S.R.L. and Bolder Industries each lead with 7 records; SES IP AB, Berdeko Technologies, and Wong Wing-Yam follow with 6 each.
Technology Cluster Distribution
Post-processing and upgrading (Clusters 2 & 3) dominate the 2020–2025 filing period, reflecting quality certification as the primary commercial bottleneck.
From Raw Char to Tire-Grade rCB: The Three-Stage Upgrading Pipeline
The dominant innovation pathway in the 2020–2025 cluster follows a sequential upgrading logic — from direct pyrolysis through chemical demineralization to surface activation.
Where Recovered Carbon Black Goes: Five Commercial Pathways
rCB from tire pyrolysis serves multiple end markets — from tire compounding to asphalt, textiles, and energy storage — each with distinct performance requirements and IP activity levels.
Five Convergent Signals from the Most Recent Patent Filings
The 2024–2025 filing cohort reveals a shift from process efficiency toward quality certification, hydrogen co-production, and specialty material applications.
Selective Feedstock Engineering Before Pyrolysis
BASF SE’s 2025 EP pending filing signals a shift toward controlling rCB quality at the feedstock selection stage rather than relying entirely on post-processing. By selectively pyrolyzing specific rubber parts of end-of-life tires (rather than whole tires), rCB composition consistency and quality is improved at the source, enabling a process combination approach.
Surface Activation for Tire-Grade rCB Certification
T.E.C. S.R.L.’s 2024–2025 filings push toward ASTM/ISO-compliant tire-grade rCB, with reactive gas surface activation at 800–1000°C as the key enabler for market entry into new tire compounding. The two-stage process — inert atmosphere heat treatment at 550–800°C followed by CO₂, superheated steam, or nitrogen activation — represents the most advanced quality pathway in this dataset.
Integrated Hydrogen & Carbon Black Co-Production
Clean Carbon Pty Ltd’s 2024 WO filing combines pyrolysis rCB recovery with decarbonization of the hydrocarbon oil/gas stream to simultaneously produce hydrogen — positioning tire pyrolysis within the green hydrogen economy. The dual-output system generates a first rCB from pyrolysis and a second carbon black from decarbonization of the liquid/gas hydrocarbon transition feedstock.
IP Strategy Signals for rCB Market Entrants and Incumbents
Key strategic takeaways derived from the patent and literature dataset, covering portfolio positioning, white space identification, and commercial bottlenecks.
| Strategic Signal | Key Players | Implication | Action |
|---|---|---|---|
| Quality certification is the primary commercial bottleneck | T.E.C. S.R.L., Bolder Industries, Bridgestone | Most active 2020–2025 innovation cluster focuses on post-processing, not pyrolysis itself | Prioritise demineralization, surface activation, and characterisation methods as highest-value IP targets |
| Tire-to-tire circularity is the dominant value narrative | Bridgestone (EP 2017, 2023), BASF SE (EP 2025) | OEM tire manufacturers are qualifying rCB for their own supply chains | Anticipate offtake agreements and specification-setting power shifting to tire OEMs |
| T.E.C. S.R.L. and Bolder Industries hold the broadest active portfolio positions | T.E.C. S.R.L. (7 records, WO/EP/CA/US/AU/IN), Bolder Industries (7 records, US/CA/AU/WO) | New entrants face dense IP coverage in purification and pelletizing | Map white spaces in feedstock blending control and integrated zinc recovery for separate monetisation |
| Molten salt and plasma approaches represent differentiated IP positions | Huazhong University (US 2021, 2024), Global Enviro (WO 2023, US 2024) | Technically distinct from acid-treatment/solvent-extraction paradigm | Consider licensing or partnership for higher-purity rCB with different cost structures |
Carbon Black Pyrolysis Tire Recycling — key questions answered
Recovered carbon black (rCB) — also called pyrolytic carbon black (CBp) or regenerated carbon black — is the solid fraction obtained when end-of-life tires are thermally decomposed in the absence of oxygen (pyrolysis). Tires contain approximately 25–35% carbon black by weight, making rCB recovery a high-value proposition within a circular economy framework.
Typical pyrolysis product distributions at optimized conditions are: pyrolytic oil (45 wt%), char/rCB (35 wt%), gas (10 wt%), and steel wire (10 wt%), as confirmed by both a Palestinian industrial plant study and Bangladeshi commercial deployment.
The solid char contains virgin carbon black (80–90 wt%) co-mixed with inorganic ash (10–15 wt%, primarily ZnO and ZnS), sulfur compounds (1–3 wt%), and carbonaceous deposits from the pyrolysis reaction itself — collectively degrading surface reactivity and limiting direct substitution for furnace-grade virgin carbon black.
T.E.C. S.R.L. (Italy) and Bolder Industries (US) hold the broadest active portfolio positions, each with 7 patent records across multiple jurisdictions. T.E.C. S.R.L. focuses on purification and surface activation; Bolder Industries focuses on pelletizing and system integration.
Literature evidence confirms that char from tire pyrolysis modifies bitumen rheology: addition of CO2-atmosphere pyrolysis char at 3 wt% raises the gel-to-sol transition temperature by up to 4.5°C and increases rigidity at 50°C by approximately one order of magnitude. Pyrolysis carbon black addition at 10–20 wt% improves resistance to permanent deformation in asphalt binders.
The most recent filings reveal five convergent directions: selective feedstock engineering before pyrolysis (BASF SE), surface activation for tire-grade rCB (T.E.C. S.R.L.), integrated hydrogen and carbon black co-production (Clean Carbon Pty Ltd), plasma and advanced thermal reactor designs (Global Enviro Holding), and textile and specialty material applications (Techun Co., Ltd. and Chinese filers).
PatSnap Eureka searches patents and research literature to answer instantly.