公开(公告)号：EP0641366A4

公开(公告)日：1995-05-31

申请号：EP93911683

申请日：1993-05-04

申请人： PETWEST PTY LTD

发明人： WEST SIMON MICHAEL

IPC分类号： C08J11/10 ,  C07C67/03 ,  C08G63/12 ,  C08G63/88 ,  C08J11/06 ,  C08J11/00 ,  C08J11/02

CPC分类号： C08J11/06 ,  C07C67/03 ,  C08J11/24 ,  C08J2367/02 ,  Y02W30/701 ,  Y02W30/706 ,  C07C69/82

摘要： A process for removing contaminants from PET components by depolymerising poly ethylene terephthalate ('PET') comprising transesterifying material containing PET by reacting ethanediol having a temperature at or about the boiling point of ethanediol with the material for a predetermined period of time to form a solution containing soluble short chain PET polymers and/or bis (hydroxy ethyl) terephthalate ester ('BHT'); recovering short chain PET polymers and/or BHT and ethanediol; and hydrolysing the recovered short chain PET polymers and/or BHT at elevated pressure and temperature for a predetermined period of time to form an ethanediol solution and crystals of terephthalic acid.

公开(公告)号：EP0641366A1

公开(公告)日：1995-03-08

申请号：EP93911683.0

申请日：1993-05-04

申请人： PETWEST PTY, LTD.

发明人： WEST, Simon, Michael

IPC分类号： C08J11 ,  C07C67 ,  C08G63

CPC分类号： C08J11/06 ,  C07C67/03 ,  C08J11/24 ,  C08J2367/02 ,  Y02W30/701 ,  Y02W30/706 ,  C07C69/82

摘要： A process for removing contaminants from PET components by depolymerising poly ethylene terephthalate ('PET') comprising transesterifying material containing PET by reacting ethanediol having a temperature at or about the boiling point of ethanediol with the material for a predetermined period of time to form a solution containing soluble short chain PET polymers and/or bis (hydroxy ethyl) terephthalate ester ('BHT'); recovering short chain PET polymers and/or BHT and ethanediol; and hydrolysing the recovered short chain PET polymers and/or BHT at elevated pressure and temperature for a predetermined period of time to form an ethanediol solution and crystals of terephthalic acid.