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      "text": "This process require a basic chemical knowledge. Pyrolysis is a well-known strategy for waste treatment: plastic, biomass, motor oil, waste cooking oil, exhausted tyres are processed in this way since long time. Pyrolysis  is a simple process where plastic is decomposed back into a crude-oil like product. \n\nA 11 L steel container is filled with 500 g shredded PET water bottles and 1.5 kg of calcium hydroxide, sealed and heated on a gas burner for 2-3 h circa. The oil collected is washed with water, then filtered many times through cotton. The product is crude pyrolytic oil.",
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      "text": "The crude oil obtained is distilled simply. Fraction below 75 Celsius is discarded, the 78 - 80 Celsius recovered: this is mainly pure benzene, an high value hydrocarbon, commonly used as solvent.\n\nThe remaining can be distilled more to get other fractions or used as gasoline directly into electrical generators.",
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