公开(公告)号：US4686046A

公开(公告)日：1987-08-11

申请号：US812448

申请日：1985-12-23

申请人： Robert A. Pyles ,  Patrick J. Mulvey

发明人： Robert A. Pyles ,  Patrick J. Mulvey

IPC分类号： C08G64/40 ,  B01D13/00

CPC分类号： C08G64/406

摘要： A process for separating cyclic oligomeric dihydric phenol carbonate from aromatic polycarbonate which comprises contacting a solution comprising a major amount of aromatic polycarbonate and a minor amount of cyclic oligomer with a semi-permeable membrane, and recovering a second solution which has passed through the said membrane, said second solution enriched in cyclic oligomer.

摘要翻译： 一种用于从芳族聚碳酸酯中分离环状低聚二元酚碳酸酯的方法，包括使含有大量芳族聚碳酸酯和少量环状低聚物的溶液与半透膜接触，并回收已经通过所述膜的第二溶液 所述第二溶液富含环状低聚物。

公开(公告)号：US4686277A

公开(公告)日：1987-08-11

申请号：US812450

申请日：1985-12-23

申请人： Richard W. Howery ,  Niles R. Rosenquist ,  Robert A. Pyles ,  Patrick J. Mulvey

发明人： Richard W. Howery ,  Niles R. Rosenquist ,  Robert A. Pyles ,  Patrick J. Mulvey

IPC分类号： C08G64/40 ,  C08G63/62

CPC分类号： C08G64/406

摘要： A process for separating solid cyclic oligomeric dihydric phenol carbonate from solid high molecular weight linear aromatic polycarbonate which comprises admixing an organic solvent with a composition comprising major quantities of solid high molecular weight linear aromatic polycarbonate and minor quantities of solid cyclic oligomeric dihydric phenol carbonate and separating the cyclic oligomeric dihydric phenol carbonate soluble in the organic solvent from the high molecular weight linear aromatic polycarbonate insoluble in the organic solvent, said organic solvent selected so that a very large fraction of the said solid cyclic oligomer is separated from a very large fraction of the said polycarbonate which remains as a solid in the organic solvent.

摘要翻译： 一种从固体高分子量线性芳族聚碳酸酯中分离固体环状低聚二元酚酸酯碳酸酯的方法，其包括将有机溶剂与包含大量固体高分子量线性芳族聚碳酸酯和少量固体环状低聚二元酚酸酯的组合物混合并分离 可溶于有机溶剂的环状低聚二元酚碳酸酯，不溶于有机溶剂的高分子量线性芳族聚碳酸酯，选择所述有机溶剂使得非常大部分的所述固体环状低聚物与非常大部分的 所述聚碳酸酯在有机溶剂中保持固体。

公开(公告)号：US4663433A

公开(公告)日：1987-05-05

申请号：US812449

申请日：1985-12-23

申请人： Robert A. Pyles ,  Patrick J. Mulvey

发明人： Robert A. Pyles ,  Patrick J. Mulvey

IPC分类号： C08G64/40 ,  C08G63/62

CPC分类号： C08G64/406

摘要： A process for separating cyclic oligomeric dihydric phenol carbonate from high molecular weight linear aromatic polycarbonate which comprises admixing a solution of aromatic polycarbonate and oligomeric dihydric phenol carbonate in a halogenated organic solvent with an antisolvent selected from the group consisting of butanol, isobutanol and an alkane of from five to about nine carbon atoms, inclusive, separating the solid aromatic polycarbonate from the solution of cyclic oligomeric dihydric phenol carbonate, increasing the antisolvent to halogenated organic solvent ratio and thereby precipitate the cyclic oligomeric dihydric phenol carbonate.

摘要翻译： 一种从高分子量线性芳族聚碳酸酯中分离环状低聚二元酚酸酯碳酸酯的方法，其包括将芳族聚碳酸酯和低聚二元酚碳酸酯的溶液在卤代有机溶剂中与选自丁醇，异丁醇和烷烃的反溶剂混合 包括5至约9个碳原子，将固体芳族聚碳酸酯与环状低聚二元酚碳酸酯溶液分离，将反溶剂升至卤化有机溶剂比例，从而沉淀出环状低聚二元酚碳酸酯。