公开(公告)号：US10738000B2

公开(公告)日：2020-08-11

申请号：US16276252

申请日：2019-02-14

申请人： BRACCO IMAGING S.P.A.

发明人： Roberta Fretta ,  Pietro Delogu ,  Fernanda Di Giorgio ,  Alfonso Nardelli ,  Stefano Sguassero ,  Carlo Felice Viscardi

IPC分类号： C07C67/08 ,  C07C67/287 ,  C07C51/44 ,  B01D3/00 ,  C07C67/54

摘要： The present invention relates to a method for the acetylation of an aqueous solution of lactic acid to (S)-2-acetyloxypropionic acid.The process comprises in particular removing water from the solution of lactic acid and reacting lactic acid with acetic anhydride in the presence of acetic acid.

公开(公告)号：US10246400B2

公开(公告)日：2019-04-02

申请号：US15946204

申请日：2018-04-05

申请人： BRACCO IMAGING S.P.A.

发明人： Roberta Fretta ,  Pietro Delogu ,  Fernanda Di Giorgio ,  Alfonso Nardelli ,  Stefano Sguassero ,  Carlo Felice Viscardi

IPC分类号： C07C67/08 ,  C07C67/287 ,  C07C51/44 ,  B01D3/00 ,  C07C67/54

摘要： The present invention relates to a method for the acetylation of an aqueous solution of lactic acid to (S)-2-acetyloxypropionic acid.The process comprises in particular removing water from the solution of lactic acid and reacting lactic acid with acetic anhydride in the presence of acetic acid.

公开(公告)号：US09963416B2

公开(公告)日：2018-05-08

申请号：US15315401

申请日：2015-06-10

申请人： BRACCO IMAGING S.P.A.

发明人： Roberta Fretta ,  Pietro Delogu ,  Fernanda Di Giorgio ,  Alfonso Nardelli ,  Stefano Sguassero ,  Carlo Felice Viscardi

IPC分类号： C07C67/48 ,  C07C67/08 ,  C07C51/44 ,  C07C67/54 ,  C07C67/287 ,  B01D3/00

CPC分类号： C07C67/08 ,  B01D3/009 ,  C07B2200/07 ,  C07C51/44 ,  C07C67/287 ,  C07C67/54 ,  C07C69/63 ,  C07C69/14 ,  C07C53/08 ,  C07C59/08

摘要： The present invention relates to a method for the acetylation of an aqueous solution of lactic acid to (S)-2-acetyloxypropionic acid. The process comprises in particular removing water from the solution of lactic acid and reacting lactic acid with acetic anhydride in the presence of acetic acid.