Carbon Recovery Quality in Tire Recycling

A process to improve the quality of carbon black produced from tire pyrolysis. The process involves multiple stages to activate and stabilize the carbon black: 1. Preheating the crushed tires at a low temperature to remove volatile compounds. 2. Further heating at a higher temperature to decompose the tire components into carbon black and gas. 3. Cooling and separating the carbon black from the gas. 4. Post-treatment of the carbon black, such as grinding and sieving, to further improve its properties. By using a staged heating process, it allows better control and separation of the carbon black from impurities like iron wires. This results in a more stable and higher quality carbon black product from tire pyrolysis.

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A method to produce carbon black for tires and color masterbatches using waste tire powder instead of traditional carbon black feedstocks like coal tar or petroleum residues. The waste tire powder and preheated oil are injected simultaneously into a high-temperature reactor at 1600-2100°C to crack and convert the tire powder into carbon black. The carbon black smoke is collected, granulated, and dried to obtain the targeted masterbatch for tire and color applications. This allows utilizing waste tire powder as a sustainable and cost-effective carbon black source.

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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.

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A system and method for producing high-quality carbon black from waste tires using pyrolysis. The process involves heating waste tires to pyrolyze them, separating the char from foreign substances containing iron, grinding the char to form carbon black, pelletizing the carbon black, cooling and drying the pellets, and packaging the pellets. The pyrolysis step has two stages: heating tires initially and then heating the char and iron from the first stage at higher temperatures. This two-stage pyrolysis allows more complete conversion of the tire waste into carbon black. The grinding steps involve sequential milling to progressively reduce the particle size. This sequence of pyrolysis and grinding stages produces high-quality carbon black with improved properties compared to existing methods.

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Method for modifying waste tire thermal cracking carbon black to improve its properties for use in rubber compounds. The modification involves three steps: 1) high temperature treatment under nitrogen or vacuum to partially decompose the carbon black, 2) acid pickling to remove ash, and 3) grafting a coupling agent onto the carbon black. This modification sequence reduces ash content, improves dispersion, and enhances rubber reinforcement compared to just acid pickling or high temperature treatment alone.

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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.

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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.

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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.

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Method to regenerate activated carbon from waste tire carbon black to improve its value and utility. The process involves treating the waste tire carbon black to remove impurities, granulating it, and then activating the granules again. This improves the activated carbon properties like iodine adsorption capacity. It removes ash and volatile matter from the carbon black, reduces carbon loss during activation, and uses waste activated carbon to generate water vapor for activation.

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A process for extracting and recycling carbon black from waste tires and scrap rubber to form reclaimed carbon black. The process involves pyrolysis of tire and rubber feedstock in a reactor to decompose the organic material and extract the carbonaceous component. The reclaimed carbon black can then be pelletized and used in applications like plastic pigmentation, rubber compounding, and tire manufacture. The process reduces landfill waste from tires by extracting a valuable recyclable material from them. It also allows for recycling of carbon black from scrap rubber.

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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.

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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.

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Process system for preparing pyrolysis carbon black from waste tires that overcomes the issues of steel wire entanglement and blocking during pyrolysis. The system uses a chain-spoke rotary drum to break the tire into carbon and separate steel. The carbon is further pulverized in a fluidized bed jet mill. Exhaust gases from the mill are recycled to heat the pyrolysis drum. The pulverized carbon is then granulated in a fluidized bed with water spray to prevent agglomeration. This allows continuous production of small-particle pyrolysis carbon black from waste tires without issues of steel wire entanglement.

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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.

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Method to regenerate pyrolysis carbon black from waste tires to improve its reinforcement properties and enable recycling of tire rubber. The regeneration involves vacuum surface activation to remove ash and restore activity. The pyrolysis carbon black is heated in vacuum to rapidly decompose surface organic compounds. This exposes more active sites and reduces activation temperature. After heating, cooling prevents carbon structure changes. The regenerated carbon black has higher reinforcement compared to untreated pyrolysis carbon black.

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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.

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Efficient and carbon-rich recycling of waste tires by pyrolysis and activation to produce high quality carbon materials instead of low quality coke. The process involves crushing the tires to obtain rubber powder, pyrolyzing the powder at temperatures around 800°C in an inert atmosphere to yield high quality carbon and oil, and then activating the carbon at temperatures around 1300°C with a catalyst like zinc chloride to produce sulfur-doped porous carbon. This allows recovering most of the carbon content from the tires instead of losing it as CO2 or low quality coke.

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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.

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Environmentally friendly regeneration process for activated carbon that improves the recovery of waste activated carbon and restores its adsorption capacity. The process involves pulverizing the waste activated carbon, vacuum extracting to desorb adsorbates, washing with acid-base solutions, and then activating at high temperature with potassium ferrate to further restore pore structure and carbonization. The modified phenolic resin binder used during carbonization helps improve strength and prevent pore blocking compared to traditional pitches.

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Waste tire pyrolysis carbon black processing system for tire manufacturing to change the carbon black structure for tire manufacturing. The system involves a waste tire pretreatment device, pyrolysis activation device, and carbon black deep processing device. The pyrolysis process uses carbonization and high-temperature steam activation. The carbon black deep processing uses grinding and modification integrated technology. This allows upgrading the waste tire pyrolysis carbon black structure to meet tire reinforcement standards.

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