公开(公告)号：US20190119240A1

公开(公告)日：2019-04-25

申请号：US16096080

申请日：2017-04-19

Applicant: SABIC Global Technologies B.V

Inventor： Aaron Royer ,  Robert J. Werling ,  Jorge Jimenez ,  Norman Enoch Johnson

IPC: C07D307/89

CPC classification number: C07D307/89

Abstract: A method for producing an aromatic dianhydride includes reacting an aromatic diimide with a substituted or unsubstituted phthalic anhydride in an aqueous medium in the presence of an amine exchange catalyst to provide an aqueous reaction mixture including an N-substituted phthalimide, an aromatic tetraacid salt, and at least one of an aromatic triacid salt and an aromatic imide diacid salt. The method further includes removing the phthalimide from the aqueous reaction mixture by extracting the aqueous reaction mixture with an organic solvent for a first time period, at a first extraction temperature and subsequent to the first time period, extracting the aqueous reaction mixture with an organic solvent for a second time period, at a second extraction temperature. The aromatic tetraacid salt is converted to the corresponding aromatic dianhydride. Aromatic dianhydrides prepared according to the method are also described.

公开(公告)号：US10676571B2

公开(公告)日：2020-06-09

申请号：US14094104

申请日：2013-12-02

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Hao Zhou ,  Manojkumar Chellamuthu ,  Aaron Royer

IPC: C08G73/10 ,  B29C45/00 ,  B29C49/00 ,  C08L79/08 ,  B29K79/00

Abstract: A polyetherimide composition comprises the polymerization product of a catalyzed imidization product of a 3-substituted phthalic anhydride and a sulfone diamine having improved melt stability and reduced corrosivity, and a method of manufacture thereof.

公开(公告)号：US10407397B2

公开(公告)日：2019-09-10

申请号：US16096080

申请日：2017-04-19

Applicant: SABIC Global Technologies B.V

Inventor： Aaron Royer ,  Robert J. Werling ,  Jorge Jimenez ,  Norman Enoch Johnson

IPC: C07D307/89

Abstract: A method for producing an aromatic dianhydride includes reacting an aromatic diimide with a substituted or unsubstituted phthalic anhydride in an aqueous medium in the presence of an amine exchange catalyst to provide an aqueous reaction mixture including an N-substituted phthalimide, an aromatic tetraacid salt, and at least one of an aromatic triacid salt and an aromatic imide diacid salt. The method further includes removing the phthalimide from the aqueous reaction mixture by extracting the aqueous reaction mixture with an organic solvent for a first time period, at a first extraction temperature and subsequent to the first time period, extracting the aqueous reaction mixture with an organic solvent for a second time period, at a second extraction temperature. The aromatic tetraacid salt is converted to the corresponding aromatic dianhydride. Aromatic dianhydrides prepared according to the method are also described.