高压灭菌器
对苯二甲酸
材料科学
原材料
产量(工程)
化学工程
聚烯烃
液化
水热液化
傅里叶变换红外光谱
复合材料
冶金
有机化学
化学
聚酯纤维
催化作用
工程类
图层(电子)
作者
Ilaria Agostini,Benedetta Ciuffi,Riccardo Gallorini,Andrea Maria Rizzo,David Chiaramonti,Luca Rosi
出处
期刊:Molecules
[MDPI AG]
日期:2022-10-21
卷期号:27 (20): 7112-7112
被引量:4
标识
DOI:10.3390/molecules27207112
摘要
In this study, we investigate the hydrothermal liquefaction (HTL) of PET separated from a densified postconsumer plastic mix, with the aim of recovering its monomer. This second raw material is made up of 90% polyolefin, while the remaining 10% is made up of PET, traces of metals, paper, and glass. After preliminary separation by density in water, two batch experiments were performed on the sunken fraction (composed mainly of PET) in a stainless steel autoclave at 345 °C for 30 and 20 min. Both trials resulted in similar yields of the three phases. In particular, the solid yield is around 76% by weight. After a purification step, this phase was analyzed by UV-Vis, 1H-NMR, and FTIR spectroscopy and resulted to be constituted by terephthalic acid (TPA), a product of considerable industrial interest. The study proved that the hydrothermal liquefaction process coupled with density separation in water is effective for obtaining TPA from a densified postconsumer plastic mix, which can be used for new PET synthesis.
科研通智能强力驱动
Strongly Powered by AbleSci AI