Pyrolytic Oil Recovery from Recycled Tires

A method for producing fuel oil using pyrolysis oil from waste plastics as a replacement for high value fuel oil components like kerosene, gas oil, and residue. The pyrolysis oil is fractionated into distillate and heavy oil fractions. The heavy fraction is blended with the traditional fuel oil components to make the final fuel oil product. This allows recycling waste plastics back into fuel oil production and reduces the need for kerosene and other high value feedstocks. The method involves pyrolyzing mixed waste plastics to produce pyrolysis oil, then separating it into distillate and heavy fractions. The heavy fraction is blended with kerosene, gas oil, residue, etc. to make the final fuel oil.

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Hydrotreatment process for waste tire pyrolysis oil that overcomes issues like high diolefin content, high sulfur, nitrogen, and chlorine levels. The process involves a specific sequence and catalyst to enable hydrogenation of waste tire pyrolysis oil. It includes mixing the pyrolysis oil with hydrogen at high pressure (15 MPa or more) to hydrogenate the oil. This is followed by a second mixing step with hydrogen at lower pressure (5 MPa or more) using a different hydrogenation catalyst. This two-step hydrogenation sequence allows effective hydrogenation of the oil without deactivating the catalyst due to sulfur and nitrogen levels.

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Economically recovering desulfurized fuel oil and fuel gas from waste tires by using a combination of hydroprocessing and distillation. The process involves hydroprocessing the pyrolysis oil from tires to desulfurize it. The hydroprocessed oil is then distilled into multiple fuel products like kerosene, naphtha, fuel oil, fuel, and diesel. The hydrogen demand of the hydroprocessing is met by recirculating hydrogenated material. The excess fuel gas from pyrolysis is used to generate power. The power production from byproducts and electrolytic hydrogen production from the low-cost power co-produced further reduces costs.

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Simultaneous processing of feedstocks containing pyrolysis oil from plastic waste and renewable resource oils to remove impurities and prepare them for further refining. The process involves steps like selective hydrogenation, hydrodemetallation, and hydrotreating. It allows converting the feedstocks into cleaner products suitable for integration into existing refineries. The steps are done at elevated temperatures and hydrogen pressures to minimize gum formation. This enables handling the pyrolysis oil without clogging issues. The method reduces impurities like dienes, metals, metalloids, chlorine, and sulfur to levels compatible with refinery units.

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Refining high-quality light oil from pyrolysis oil to make it versatile as fuel. The process involves pre-treating the pyrolysis oil to remove impurities, stripping out heavy oil, cracking the remaining hydrocarbons, fractionally distilling the cracked oil, and filtering the final light oil to purify it. This refining method converts pyrolysis oil into high-quality light oil suitable as a general-purpose fuel.

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Upgrading pyrolysis oil from plastic and rubber waste to produce a higher quality fuel with reduced impurities like olefins, solid residues, and heteroatoms. The process involves treating the pyrolysis oil with an aqueous solution and optionally a hydrocarbon fluid to separate into phases. The organic phase is then separated and filtered to obtain the upgraded pyrolysis oil with reduced impurities compared to the original oil. This allows using the upgraded oil as transportation fuel, blending with other fuels, or as a chemical feedstock. The aqueous solution helps extract impurities from the pyrolysis oil into the water phase. The hydrocarbon fluid assists separation and reduces solid residues.

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Method for efficiently producing chemical products and carbides from waste tires. The method involves pyrolyzing crushed tires to obtain a gas, oil, and residue. Then, hydrocracking the tire oil to separate light and heavy fractions. The heavy fraction is steam cracked to make chemical products and carbide feedstock. The carbide is made by thermal decomposition or incomplete combustion of the carbide feedstock. This allows efficient extraction of both chemical products and carbides from waste tires.

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A process for disposing of end-of-life tires (ELT) that provides complete reuse without environmental problems. The process involves pyrolyzing the tires to produce pyrolysis oil. The pyrolysis oil is then subjected to hydrorefining to improve its quality and make it suitable for substituting fossil fuels in industrial processes. This allows converting the tires into a valuable product instead of burning them or landfilling them. The hydrorefining step removes impurities like rubber fines and contaminants to produce a cleaner, more useful oil.

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A method to co-pyrolyze waste tires and waste polyolefin plastics in an anaerobic environment to produce low-oxygen high-quality pyrolysis oil. The method involves mixing the waste tire and waste polyolefin plastics in a 1:1-10 mass ratio, heating them at 400-800°C for 10-60 seconds, and collecting the liquid phase pyrolysis product. The co-pyrolysis of waste tires and waste polyolefin plastics significantly reduces the oxygen content in the pyrolysis oil, improves the yield and quality of the pyrolysis oil, and expands the relationship between waste tires and waste plastics. It provides a coordinated recycling solution for harmless treatment of waste tires and waste plastics while reducing carbon emissions.

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Upgrading pyrolysis oil from organic waste cracking to improve quality and enable deeper processing. The process involves secondary cracking of the pyrolysis oil and water mixture to separate and upgrade the pyrolysis oil. The secondary cracking involves flashing, washing, condensation, and separation to remove impurities and produce refined oil. This improves the quality of the pyrolysis oil compared to direct sale of the mixed condensate.

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Process for recycling rubber shavings from end-of-life tires into resins that can be used in tire production without degrading tire performance. The process involves pyrolysis of the rubber shavings to generate an oil containing olefinic monomers. The oil is then separated into fractions, with the intermediate fraction containing the desired monomers. This fraction is polymerized to form the resins. The process conditions are optimized to maximize monomer yield from the shavings. The resulting resins can be used in tire manufacturing without negatively impacting tire performance.

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A method for producing high-quality oil from waste tires by pyrolysis, separation, and refining. The method involves crushing the waste tires, pyrolyzing them in an ammonia atmosphere under pressure, separating the resulting liquid mixture, and refining the crude oil. The pyrolysis step is done at 425°C for 2 hours. The separation involves cooling and extracting with dichloromethane. The refining step involves hydrogenation with a catalyst and tetrahydronaphthalene. This results in high-quality oil with properties similar to industrial grade oil.

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Pyrolysis of waste rubber like tires to make fuel products that can be used in marine applications. The fuel has specific properties like flash point, boiling range, density, acid number, styrene content, and halogen content. The fuel is derived from pyrolyzing rubber and separating the oil. The pyrolysis conditions are 400-550°C, 1-4 hours residence time, and negative pressure. The oil is then centrifuged to remove solids before separation. The fuel has a flash point above 40°C, boiling point above 140°C, density below 990 kg/m3, acid number below 12, styrene below 7000 ppm, and halogen below 50 mg/kg.

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Efficient and effective methods for separating pyrolysis oil from tire pyrolysis into commercially desirable fractions and a fuel oil fraction. The methods involve initial thin-film distillation to separate a lighter fraction and a heavier fraction. The lighter fraction is further fractionally distilled to obtain improved quality products. The heavier fraction is processed to remove sulfur and nitrogen for use as a fuel oil. The thin-film distillation allows stable separation of the fractions due to low wall temperatures. Vacuum thin-film distillation at 100-400 torr further improves separation.

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Extracting fuel products from waste rubber like tires through pyrolysis and separation to produce valuable fuel compositions. The pyrolysis of waste rubber produces an oil with high levels of black carbon. This oil is then separated to extract two fuel products. One product is a low-density, low-sulfur fuel with low halogen content and low aromatic content. The other product is a high-density fuel with high aromatic content. The low-density fuel has properties suitable for commercial use as a fuel while simultaneously satisfying requirements like low flash point, low sulfur, low halogen, and low aromatic content. This allows using it in tanks, vessels, and equipment without the need for post-use cleaning due to the black color. The high-density fuel has high aromatic content and can be used as a boiling stock.

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Integrated solid waste gentle cracking system for recycling waste tires into usable products. The system involves breaking the tires into rubber particles, mildly pyrolyzing the particles to extract oil, carbon black, and gas, and then further processing the oil and carbon black into modified forms suitable for use in products like rubber, asphalt, plastics, and pigments. The system allows 100% utilization of waste tires by recovering all components.

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Extracting valuable compounds from tire pyrolysis oil using steam distillation and fractional distillation. The process involves initially separating the oil using steam distillation to produce a lighter fraction rich in terpenes and a heavier fraction. The lighter fraction is further distilled to isolate the terpenes and other valuable compounds. This two-stage distillation allows selective extraction of high-value components from tire pyrolysis oil without degradation.

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Extracting valuable compounds from tire pyrolysis oil using a two-stage distillation process. The first stage is steam distillation to separate a lighter fraction containing terpenes like limonene from the heavier fraction. The lighter fraction is then further distilled to isolate commercially valuable products like solvents, flavors, and scents. The heavier fraction can be used as a solvent, fuel oil, or feedstock for chemical processes. The steam distillation avoids high temperatures that decompose the sensitive terpenes.

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A method to recycle waste rubber and plastic while also connecting it to the plant fiber industry. The method involves pyrolyzing waste rubber/plastics to extract oil and other substances. This pyrolysis oil can be blended with plant fiber products to improve their properties. The pyrolysis slag and ash can be thermally regenerated into useful materials. The transformation energy and waste heat from pyrolysis can also be harnessed. This integrates waste rubber/plastics recycling with plant fiber production for a more sustainable and profitable circular economy.

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A system for extracting valuable compounds from pyrolyzed scrap tires while preserving the carbon black solids. The system uses a catalyst/additive that decomposes at the melting point of the rubber to release catalytic ions. This allows the catalyst to contact the rubber as it decomposes and prevents volatile compounds from carrying the catalyst away. The pyrolysis oil is then recovered, purified, and concentrated to extract valuable fragrance and essential oils like limonene. The solids are separated to retain the carbon black. This maximizes value recovery from the pyrolysis process.

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