Comprehensive utilization method of styrene tar
A technology of styrene and p-styrene, applied in the field of comprehensive utilization of styrene tar, can solve problems such as a large number of hazardous wastes, lack of related systems, etc., and achieve the effect of resource utilization
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Embodiment 1
[0053] 700g of styrene tar, 100g of sodium hydroxide, 100g of water, and 100g of carbon tetrachloride were mixed, washed with alkali, washed with water, and separated to obtain an oil phase. The oil phase was distilled at 330°C under normal pressure to obtain the gas phase. The gas phase is cooled and separated to obtain the solvent, styrene and its derivatives, and the liquid phase obtained by distillation of the oil phase is cracked and fractionated at 380°C under normal pressure to obtain the gas phase. Styrene and its derivatives are obtained after the gas phase is cooled down. The liquid phase obtained by cracking and fractional distillation is hydrotreated at 400°C under a pressure of 8.0 MPa, and the obtained hydrotreated liquid phase is distilled at a temperature of 260°C under a pressure of -0.1 MPa to obtain a gas phase. The gas phase is cooled to obtain tar resin, and the liquid phase obtained by distillation is rich in valuable components (such as stilbene).
Embodiment 2
[0055] 700g of styrene tar, 100g of potassium hydroxide, 100g of water, and 100g of carbon tetrachloride were mixed, washed with alkali, washed with water, and separated to obtain an oil phase. The oil phase was distilled at 330°C under normal pressure to obtain the gas phase. The gas phase is cooled and separated to obtain the solvent, styrene and its derivatives, and the liquid phase obtained by distillation of the oil phase is cracked and fractionated at 380°C under normal pressure to obtain the gas phase. Styrene and its derivatives are obtained after the gas phase is cooled down. The liquid phase obtained by cracking and fractional distillation is hydrotreated at 400°C under a pressure of 8.0 MPa, and the obtained hydrotreated liquid phase is distilled at a temperature of 260°C under a pressure of -0.1 MPa to obtain a gas phase. The gas phase is cooled to obtain tar resin, and the liquid phase obtained by distillation is rich in valuable components (such as stilbene).
Embodiment 3
[0057] 700g of styrene tar, 100g of calcium hydroxide, 100g of water, and 100g of carbon tetrachloride were mixed, washed with alkali, washed with water, and separated to obtain an oil phase. The oil phase was distilled at 330°C under normal pressure to obtain the gas phase. The gas phase is cooled and separated to obtain the solvent, styrene and its derivatives, and the liquid phase obtained by distillation of the oil phase is cracked and fractionated at 380°C under normal pressure to obtain the gas phase. Styrene and its derivatives are obtained after the gas phase is cooled down. The liquid phase obtained by cracking and fractional distillation is hydrotreated at 400°C under a pressure of 8.0 MPa, and the obtained hydrotreated liquid phase is distilled at a temperature of 260°C under a pressure of -0.1 MPa to obtain a gas phase. The gas phase is cooled to obtain tar resin, and the liquid phase obtained by distillation is rich in valuable components (such as stilbene).
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