MONOMER RECOVERY BY PYROLYSIS OF POLY(METHYL METHACRYLATE) (PMMA)
MONOMER RECOVERY BY PYROLYSIS OF POLY(METHYL METHACRYLATE) (PMMA)
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DOI：
10.1016/0165-2370(91)80052-a
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发表时间：
1991-07-01
影响因子：
6
通讯作者：
FRANCK, J
中科院分区：
文献类型：
--
作者：
KAMINSKY, W;FRANCK, J
有许多方法可以回收PMMA废料中有价值的甲基丙烯酸甲酯（MMA）。 使用熔融容器或加热的螺旋进料器的MMA产率是不够的，并且在50和80重量%之间。 在温度为450 ℃的间接加热流化床工艺中，超过97wt%的PMMA可以作为单体回收。 产率取决于热解温度。在590 ℃时，气体分数急剧增加。 这种气体的主要成分是甲烷、乙烯、丙烯、一氧化碳和二氧化碳。 除MMA外，液体中的主要组分是丙烯酸甲酯。 在蒸馏后，可以将液体重新混合成新的PMMA，而无需任何其他纯化。 即使是填充和着色的PMMA材料，如汽车的尾灯，也可以聚合成聚合级液体。
There are many processes to recover the valuable methylmethacrylate (MMA) of PMMA waste. The yield of MMA using melting vessels or heated screw feeders is not sufficient and lies between 50 and 80 wt%. In a indirectly heated fluidized bed process with a temperature of 450-degrees-C more than 97 wt% of the PMMA could be recovered as monomer. The yield depends on the pyrolysis temperature.At 590-degrees-C the gas fraction increases drastically. The main components of the gas are methane, ethene, propene, carbon monoxide and carbon dioxide. The main component in the liquid beside the MMA is methyl acrylate. It is possible to polymerize the liquid to new PMMA after distillation without any other purification. Even filled and coloured PMMA materials like rear lights of cars could be polymerized to a polymerization grade liquid.