Composition and preparation method thereof

The invention discloses the composition and the preparation method thereof. The preparation method of the composition comprises the following steps: providing a polyethylene terephthalate waste material; the method comprises the following steps: carrying out a depolymerization process on the polyeth...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: LI TIANSAN, TONG YULAN, HUANG GONGXUN, HUANG SHUJUAN, GUO XINLIANG, ZHANG WENSHENG
Format: Patent
Sprache:chi ; eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The invention discloses the composition and the preparation method thereof. The preparation method of the composition comprises the following steps: providing a polyethylene terephthalate waste material; the method comprises the following steps: carrying out a depolymerization process on the polyethylene terephthalate waste material in the presence of a catalyst and an alcoholysis agent to obtain a mixture, wherein an oxidizing atmosphere is continuously introduced in the depolymerization process; performing a solid-liquid separation process on the mixture to obtain a solid; and performing a purification process on the solid to obtain the composition. The preparation method of the composition can reduce the generation of key impurities. 本发明公开了一种组合物及其制备方法。该组合物的制备方法包含:提供一聚对苯二甲酸乙二酯废料。在一催化剂及一醇解剂存在下对该聚对苯二甲酸乙二酯废料进行一解聚工艺得到一混合物,其中在该解聚工艺中持续导入一氧化气氛(oxidizing atmosphere)。对该混合物进行一固液分离工艺,得到一固体。对该固体进行一纯化工艺,得到该组合物。本发明组合物的制备方法可降低关键杂质的生成。