公开(公告)号：US06262294B1

公开(公告)日：2001-07-17

申请号：US09504900

申请日：2000-02-16

申请人： Takeshi Sako ,  Masazumi Godo ,  Seiji Ishida ,  Kunio Miura ,  Masayuki Tsugumi

发明人： Takeshi Sako ,  Masazumi Godo ,  Seiji Ishida ,  Kunio Miura ,  Masayuki Tsugumi

IPC分类号： C07C6748

CPC分类号： C07C29/128 ,  C07C67/03 ,  Y02P20/544 ,  C07C69/82 ,  C07C31/202

摘要： This invention relates to a process for producing aromatic divalent carboxylic acid ester and diatomic alcohol by reacting aromatic polyester and super critical monatomic alcohol, and by the process, PET is decomposed for recovering monomer components therefrom, and thus recovered monomer components can be used as the material for reproduction of new PET. In accordance with the present invention, there is provided a process for producing continuously monomer components from aromatic polyester, the process including the steps of: feeding continuously the above aromatic polyester and the above monatomic alcohol into a reactor while the above reactor is kept to be under the super critical condition of the above monatomic alcohol; reacting the above aromatic polyester and the above super critical monatomic alcohol and discharging the resultant reaction products, i.e., aromatic divalent carboxylic acid ester and diatomic alcohol, together with the monatomic alcohol from the reactor; and separating, from the above discharged resultant products, the above aromatic divalent carboxylic acid ester and the above diatomic alcohol and recovering them.

摘要翻译： 本发明涉及一种通过芳族聚酯和超临界单原子醇反应生成芳族二价羧酸酯和双原子醇的方法，通过该方法，PET被分解以从其中回收单体组分，因此回收的单体组分可用作 根据本发明，提供了一种从芳族聚酯连续制备单体组分的方法，该方法包括以下步骤：将上述芳族聚酯和上述单原子醇连续进料到反应器中，同时 上述反应器保持在上述单原子醇的超临界条件下; 使上述芳族聚酯和上述超临界单原子醇反应，并将所得反应产物，即芳族二价羧酸酯和双原子醇与来自反应器的单原子醇一起排出; 并从上述排出的所得产物中分离出上述芳族二价羧酸酯和上述双原子醇并回收它们。