Improving Quality of Reclaimed Carbon from Tires
29 patents in this list
Updated:
Reclaiming carbon from used tires presents a unique opportunity to address environmental waste while supplying valuable materials. However, the quality of carbon black extracted through pyrolysis often falls short, plagued by impurities and inconsistent properties. This affects its performance in new rubber compounds and limits its commercial viability.
Professionals face the challenge of refining these processes to produce carbon black that meets industry standards. The main hurdles include removing contaminants, enhancing material properties, and achieving consistency across batches. Without effective solutions, the reclaimed carbon struggles to compete with virgin materials.
This page explores a range of techniques aimed at overcoming these challenges. It covers methods such as advanced processing for purity enhancement, thermal treatments for property improvement, and eco-friendly purification processes. These approaches aim to deliver reclaimed carbon that is reliable and suitable for high-quality applications, contributing to sustainable material cycles.
1. Method for Producing White Carbon Black from Waste Tires via Alkaline Extraction and Carbonization
ANHUI EVOLUTION SILICON NANO MATERIAL TECH CO LTD, ANHUI EVOLUTION SILICON NANO MATERIAL TECHNOLOGY CO LTD, 2024
A method to produce white carbon black from waste tires for use in tires and other rubber products. The method involves extracting silica from tire rubber using an alkaline solution, followed by carbonization to convert the extracted silica into white carbon black. The extracted silica is obtained by treating shredded tire rubber with a high-temperature alkaline solution. The carbonization step involves heating the extracted silica to form white carbon black. This allows recycling and reusing silica from waste tires instead of mining virgin silica.
2. Waste Tire Pyrolysis Carbon Black Refinement via Sieving, Grinding, Magnetic Separation, and Air Classification
JIANGXI BLACK CAT CARBON BLACK CO LTD, JIANGXI BLACKCAT CARBON BLACK CO LTD, 2023
Deep processing technique to improve the quality of waste tire pyrolysis carbon black. The technique involves steps like sieving, grinding, magnetic separation, and air classification to remove impurities and agglomerates from the pyrolyzed carbon black. This results in carbon black with higher surface area, oil absorption, and reinforcing properties compared to untreated pyrolyzed carbon black. The technique involves sieving to remove large pieces, grinding to crush, magnetic separation to remove ferromagnetic impurities, and air classification to further separate and refine the carbon black particles.
3. Recycled Carbon Black Production via Impurity Removal, Drying, Activation, and Granulation from Waste Tires
ANHUI GURUITE NEW MATERIAL TECH CO LTD, ANHUI GURUITE NEW MATERIAL TECHNOLOGY CO LTD, 2023
An environmentally friendly process to produce high-quality recycled carbon black from waste tires. The process involves impurity removal, drying, activation, and granulation steps. The impurity removal involves screening out large stones and deironing. The drying reduces moisture content. The activation involves heating in an oxygen-deficient atmosphere to crack the carbon structure and release volatile products. The granulation converts the activated carbon into a powder. This process improves the quality of recycled carbon black from waste tires, reducing oil absorption, iodine absorption, and specific surface area compared to conventional methods.
4. Recycled Carbon from Tire Pyrolysis with Specific Particle Size Distribution for Enhanced Rubber Composite Dispersion
BEYOND LOTUS LLC, 2023
Processing and using recycled carbon from tire pyrolysis to improve the performance of rubber compounds. The recycled carbon is milled to a specific particle size distribution with a target D50 below 2.7 microns and maximum 15% over 5 microns. This milled slurry is mixed with elastomer and other fillers to form rubber composites. The milling step reduces agglomerates and improves dispersion compared to unprocessed pyrolysis carbon. The milled recycled carbon has better rubber compound properties like reduced macro dispersion compared to unprocessed pyrolysis carbon.
5. Carbon Black Purification and Reactivation via Solvent Extraction and Inert Atmosphere Heat Treatment
T E C S R L, TEC SRL, 2022
Ecological process for purifying and reactivating carbon black from tire pyrolysis that reduces environmental impact compared to traditional methods. The process involves solvent extraction or heat treatment to remove impurities like bitumen and zinc from the carbon black. The solvent extraction uses medium polarity solvents with low toxicity and environmental impact. The heat treatment is done in an inert atmosphere. After purification, selective extraction of zinc using natural carboxylic acids like citric acid further improves the carbon black quality. This purification process enhances the carbon black's reinforcing properties by removing impurities and restoring the surface area.
6. Thermal Decomposition Process for Carbon Black Production via Solvent-Assisted Rubber Component Extraction from Used Tires
IFP ENERGIES NOUVELLES, IFP ENERGIES NOW, 2022
A process for converting used tires into carbon black by thermal decomposition that avoids the formation of coke and produces a cleaner liquid fraction. The process involves dissolving the tire filler in a solvent at low temperature, then raising the temperature to crack the polymer bonds. This allows selective extraction of the rubber components without extensive coke formation. The resulting carbon black is filtered and washed. The liquid fraction contains aromatic hydrocarbons suitable for solvent or fuel applications.
7. Regenerated Carbon Black Preparation via Acid Treatment and Grinding of Pyrolyzed Tire Rubber
BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY, CHINA CHEMICAL GUILIN ENG CO LTD, CHINA CHEMICAL GUILIN ENGINEERING CO LTD, 2021
A method to prepare regenerated carbon black from pyrolyzed tire rubber for reuse in tire manufacturing. The method involves treating the pyrolyzed carbon black with acid followed by grinding before activation. This removes ash and restores activity by cleaning organic molecules from the surface. The acid treatment before activation ensures uniformity and purity of the regenerated carbon black. The acid-treated, ground pyrolyzed carbon black is then activated in oxygen, carbon dioxide, water vapor, and nitrogen to restore its reinforcement performance.
8. Two-Stage Pyrolysis Process for Converting Mixed Rubber Waste into Carbon Black Powder
ATLANTIS CARBON BLACK B V, ATLANTIS CARBON BLACK BV, 2021
Recycling/upcycling of mixed rubber waste streams from tyre manufacturers. The recycling includes pyrolyzing mixed rubber waste streams to obtain a char material; further processing the char material obtained in step i) to obtain a carbon black powder; wherein the pyrolysis in step i) comprises at least a two-stage pyrolysis process, wherein the two-stage pyrolysis process comprises a first pyrolysis stage to obtain an intermediate char material, a second pyrolysis stage to obtain a char material, and a third pyrolysis stage to obtain a char material.
9. Process for Granulating Pyrolyzed Carbon Black from Waste Tires with Reduced Particle Size and Contaminants
BOLDER IND, BOLDER INDUSTRIES, 2021
Recovering carbon black from waste tires and processing it into a form that can be more easily used in rubber and plastic applications. The process involves pyrolyzing tire rubber to extract carbon black, grinding the pyrolyzed rubber to reduce particle size, drying the ground material to remove moisture, and granulating the dried material into a uniform size. This reduces agglomerate size, improves dispersibility, and reduces contaminants compared to directly pyrolyzing whole tires. The granulated carbon black can have better properties when added to rubber compounds.
10. Micro-Oxidation Activation Method for Granulated Pyrolysis Carbon Black with Additive Enhanced Lipophilicity and Compatibility
JIANGXI YONGGU NEW ENERGY CARBON BLACK CO LTD, 2021
Method to activate waste tire pyrolysis carbon black by micro-oxidation to improve its properties for rubber compounding. The method involves granulating the pyrolysis carbon black instead of directly grinding it, which reduces dust generation. The carbon black is first crushed to remove steel wires from the tires. The tire pieces are then pyrolyzed at temperatures around 400-700°C to obtain different carbon blacks. The pyrolysis gas and oil are condensed and returned as fuel. The carbon black is ground, mixed with granulation solution, granulated, and dried. Additives like carbon black dispersant and silane coupling agent are used in the granulation step to improve the carbon black's lipophilicity and compatibility with other rubber components.
11. Carbon Black Production Method from Carbon Waste via Acid and Peroxide Treatment, Pyrolysis, and Activation
CENTRAL SOUTH UNIVERSITY, UNIV CENTRAL SOUTH, 2021
A method to prepare carbon black for tires using carbon waste instead of traditional fossil fuel sources. The process involves breaking down the carbon waste particle size, treating it with acids and peroxides, pyrolyzing it at high temperatures, and then expanding and activating the resulting carbon black particles. This allows utilizing industrial waste like aluminum electrolysis cathodes and batteries to produce carbon black for tires at lower cost while reducing waste.
12. Selective Ash and Zinc Sulfide Removal Process for Pyrolysis Carbon Black from Waste Tires
GREE ELECTRIC APPLIANCES INC ZHUHAI, GREE ELECTRIC APPLIANCES INC.OF ZHUHAI, ZHUHAI GREE GREEN RENEWABLE RESOURCES CO LTD, 2021
Reducing ash content of pyrolysis carbon black from waste tires while recovering beneficial components like zinc sulfide (ZnS). The process involves selectively removing ash and ZnS from the carbon black through chemical treatments. The carbon black is mixed with water, copper sulfate, and sodium sulfite to dissolve ZnS. Zinc sulfate is then precipitated by adding butyl xanthate. This enriches the ZnS while separating it from the carbon black. The carbon black is then dried to remove the water. This reduces the ash content and recovers the ZnS for reuse.
13. Thermolysis Process for Producing Recovered Carbon Black and Low-Carbon Fuel from Used Tires
RUIZ HERRERA LUIS JAVIER, 2020
Thermal treatment of used tires to convert them into recovered carbon black and fuel. The process involves thermolysis of the tires to decompose the rubber and fibers into the products. The recovered carbon black has a surface chemistry and behavior similar to semireinforcing smoke blacks used in rubber. The fuel has a lower content of carbonaceous material compared to conventional pyrolysis oils. The lower carbon content in the fuel is achieved without post-processing steps like distillation or catalysis. This reduces investment, waste generation, and operating costs compared to conventional methods.
14. Sequential Waste Tire Pyrolysis Char Refinement System with Volatile Removal and Impurity Reduction
LD CARBON CO LTD, 2020
System and method for refining waste tire pyrolysis char to produce high-quality carbon black. The system involves sequential steps like sorting, pyrolysis, pulverization, molding, drying, screening, and packaging to improve char purity and make spherical carbon black. The pyrolysis furnace removes volatiles from the char before pulverization. This reduces impurities compared to batch pyrolysis. The method also periodically cleans the pyrolysis gas release pipe to prevent buildup.
15. Micro-Oxidation Treatment of Waste Tire Pyrolysis Carbon Black for Pore Unblocking and Surface Activation
Dalian University of Technology, DALIAN UNIVERSITY OF TECHNOLOGY, 2020
Activating waste tire pyrolysis carbon black to improve its properties for commercial applications. The activation involves micro-oxidation treatment in a separate furnace to open up blocked pores and enhance surface activity. This addresses issues with pyrolysis carbon black from waste tires having blocked pores due to ash and coke accumulation, which reduces surface activity and hinders further processing. The activation improves the carbon black's characteristics for subsequent finishing steps and expands its commercial applications.
16. System for Processing Pyrolysis Carbon Black with Integrated Magnetic Separation, Grinding, and Granulation
GUANGZHOU SHILANGPULISI GREEN ENVIRONMENTAL PROTECTION TECH CO LTD, GUANGZHOU SHILANGPULISI GREEN ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD, 2020
Method and equipment to upgrade low-value pyrolysis carbon from waste tire cracking to high-quality pyrolysis carbon black for rubber. The method involves deep processing steps like magnetic separation, grinding, granulation, sieving, and drying to meet rubber standards for tires and belts. The equipment includes a raw material warehouse, magnetic separator, modified silo, grinder, granulator, and radial cylinder dryer. This allows converting pyrolysis carbon from waste tires into usable rubber-grade carbon black.
17. Method for Recycling Tires to Produce Purified Carbon Material via Mechanical Shredding, Inhibitor Treatment, Pyrolysis, and Magnetic Separation
TEPLITSKY ALEXANDER, 2019
Recycling tires and rubber products to obtain carbon-containing material with improved properties for use in new tires. The recycling process involves mechanically shredding the tires, removing metal bead rings, and treating the shredded rubber with inhibitors to reduce impurities. The treated rubber is then pyrolyzed to produce carbon-containing material. The pyrolysis residue is separated into solid carbon and liquid condensate. The solid carbon is further processed to remove metal contaminants using magnetic separation. The resulting cleaned carbon powder has improved surface area and impurity levels compared to pyrolysis-only recycling, making it suitable for use as a tire filler.
18. Carbon Black Upgrading via Pyrolysis Residue Processing with Magnetic Separation, Micronization, and Acid Treatment
KOREA INSTITUTE OF ENERGY RESEARCH, 2012
Upgrading carbon black recovered from waste tires by eliminating residual volatile substances and inorganic additives through processing of carbon black produced by performing a pyrolysis on waste tires. The upgrading involves steps like magnetic separation to remove iron wires and fibers, micronization, heating to eliminate volatile substances, acid treatment to convert inorganic substances to salts, filtering, washing, coagulation, and drying. This enables recycling and reuse of the carbon black from waste tires with improved quality and purity.
19. Pyrolysis-Based Tire Conversion Process with Reducing Gas Atmosphere for Carbon Black Production
ALPHA RECYCLAGE FRANCHE COMTE, 2012
A process to efficiently convert waste tires into carbon black using a modified combustion method. The process involves pyrolyzing tires in a reducing gas atmosphere obtained by combusting tire vapors. This produces carbon black and gases. The gases are condensed and the condensate mixed with ground tire carbon. This mixture is combusted with excess air to further carbonize the tire fragments. The excess air prevents full combustion and creates a better quality carbon black. The process reduces ash and toxic impurities compared to direct tire combustion. It also avoids complex waste introduction.
20. Device and Method for Waste Tire Treatment with Thermal Cracking and Controlled Separation of Carbon Black
JIANGSU ZHONGLU ECOLOGICAL TECHNOLOGY CO LTD, 2010
A method and device for treating waste tires that involves crushing the tires, thermal cracking the rubber particles to extract useful materials like carbon black, and then separating and processing the carbon black. The key features include optimized temperature and pressure conditions for cracking the rubber, vacuum pumping to prevent air leakage, and controlled cooling and screening to separate carbon black from steel. This allows efficient extraction of valuable materials from waste tires.
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