PET废弃物水解及醇解化学回收技术研究

Study on the chemical recycling technologies on hydrolysis and alcoholysis of PET waste

聚对苯二甲酸乙二醇酯(PET)具有良好的透明性、气体阻隔性和力学性能、且无毒无味,广泛应用饮料瓶、纤维、工程塑料和薄膜等领域。我国是世界PET生产、消费第一大国,废弃PET排入自然界造成白色污染。PET化学回收方法,将PET解聚成单体或低聚体,是实现PET废弃物循环利用最为有效的途径。本文重点对PET废弃物的水解、醇解等化学回收方法的技术研究及工业化进展进行了综述。

Polyethylene terephthalate （PET） exhibits excellent transparent, gas barrier and mechanical properties, non-toxic, tasteless, and is used widely in the world. China possesses the most usage quantity on PET production and conasumption. Extensive use of PET materials, lead to the waste disposal management difficulties, due to the problem, PET industry, both manufacturing as well as processing, poses a positive threat to clean environment. Among the various PET recycling technologies, chemical recycling method, such as hydrolysis and alcoholysis, is one of the most effective and scientific method for PET waste treatment. In this paper, the research and industrial progress of hydrolysis and alcoholysis of PET waste are described in detail.