公开(公告)号：US10829449B2

公开(公告)日：2020-11-10

申请号：US16087824

申请日：2017-03-27

申请人： SABIC GLOBAL TECHNOLOGIES B.V.

发明人： James Patrick Schulte, II ,  Tarun Kumar Pal ,  Meerakani Mohamed Ali Sait

IPC分类号： C07D209/48 ,  C07D307/89 ,  C09K21/14 ,  C07C231/14 ,  C08G73/10

摘要： A method for the manufacture of a bis(ether anhydride) comprises contacting an N-substituted bis(ether phthalimide) with a base under conditions effective to ring open the imides to provide a ring-opened product; and contacting the ring-opened product with an acid under conditions effective to provide a composition comprising the bis(ether anhydride).

公开(公告)号：US10752603B2

公开(公告)日：2020-08-25

申请号：US16271207

申请日：2019-02-08

申请人： SABIC Global Technologies, B.V.

发明人： Hariharan Ramalingam ,  Tarun Kumar Pal ,  Meerakani Mohamed Ali Sait ,  Thomas Link Guggenheim ,  Lioba Maria Kloppenburg

IPC分类号： C07D307/89 ,  C07D307/80 ,  C08G73/10 ,  C07D407/12

摘要： A process for the purification of an oxydiphthalic anhydride includes contacting a mixture of an oxydiphthalic anhydride and at least one of the corresponding oxydiphthalic diacid, a corresponding oxydiphthalic tetraacid, a halophthalic anhydride, and a catalyst with a solvent to provide a slurry. The solvent is capable of solubilizing the corresponding oxydiphthalic diacid, the corresponding oxydiphthalic tetraacid, the halophthalic anhydride, and the catalyst at a temperature of 15 to 50° C., and the oxydiphthalic anhydride is substantially insoluble in the solvent at this temperature. The oxydiphthalic anhydride can be isolated from the slurry. A purified oxydiphthalic anhydride and a polyetherimide prepared therefrom are also disclosed.

公开(公告)号：US20190256485A1

公开(公告)日：2019-08-22

申请号：US16271207

申请日：2019-02-08

申请人： SABIC Global Technologies, B.V.

发明人： Hariharan Ramalingam ,  Tarun Kumar Pal ,  Meerakani Mohamed Ali Sait ,  Thomas Link Guggenheim ,  Lioba Maria Kloppenburg

IPC分类号： C07D307/80 ,  C08G73/10

摘要： A process for the purification of an oxydiphthalic anhydride includes contacting a mixture of an oxydiphthalic anhydride and at least one of the corresponding oxydiphthalic diacid, a corresponding oxydiphthalic tetraacid, a halophthalic anhydride, and a catalyst with a solvent to provide a slurry. The solvent is capable of solubilizing the corresponding oxydiphthalic diacid, the corresponding oxydiphthalic tetraacid, the halophthalic anhydride, and the catalyst at a temperature of 15 to 50° C., and the oxydiphthalic anhydride is substantially insoluble in the solvent at this temperature. The oxydiphthalic anhydride can be isolated from the slurry. A purified oxydiphthalic anhydride and a polyetherimide prepared therefrom are also disclosed.