公开(公告)号：US10519097B2

公开(公告)日：2019-12-31

申请号：US15573155

申请日：2016-05-03

Applicant: BASF SE

Inventor： Armin Stamm ,  Thomas Schmidt ,  Christopher Orr ,  Jeremy Manning

IPC: C07C227/18 ,  C11D3/33 ,  C01D1/04 ,  C07C229/16 ,  C11D11/00

Abstract: Process for making a chelating agent according to the general formula (I), R1—CH(COOX1)—N(CH2COOX1)2 wherein R1 is selected from hydrogen, C1-C4-alkyl, phenyl, benzyl, CH2OH, and CH2CH2COOX1, X1 is (MχH1−χ), M being selected from alkali metal, x is in the range of from 0.6 to 1, said process comprising the following steps: (a) providing a solid, a slurry or a solution of a compound according to general formula (II a) R1—CH(COOX2)—N(CH2CN)2 wherein X2 is (MyH1−y), M being selected from alkali metal, y is in the range of from zero to 1, (b) contacting said solid or slurry or solution with an aqueous solution of alkali metal hydroxide, wherein the molar ratio of alkali metal ions to nitrile groups is in the range of from 0.6:1 to 0.95:1, (c) reacting said compound according to general formula (II a) with said alkali metal hydroxide.

公开(公告)号：US20200062695A1

公开(公告)日：2020-02-27

申请号：US16665531

申请日：2019-10-28

Applicant: BASF SE

Inventor： Armin STAMM ,  Thomas Schmidt ,  Christopher Orr ,  Jeremy Manning

IPC: C07C227/18 ,  C11D11/00 ,  C07C229/16 ,  C01D1/04 ,  C11D3/33 ,  C09K8/035

Abstract: Process for making a chelating agent according to the general formula (I), R1—CH(COOX1)—N(CH2COOX1)2  (I) wherein R1 is selected from hydrogen, C1-C4-alkyl, phenyl, benzyl, CH2OH, and CH2CH2COOX1, X1 is (MxH1-x), M being selected from alkali metal, x is in the range of from 0.6 to 1, said process comprising the following steps: (a) providing a solid, a slurry or a solution of a compound according to general formula (II a) R1—CH(COOX2)—N(CH2CN)2  (II a) wherein X2 is (MyH1-y), M being selected from alkali metal, y is in the range of from zero to 1, (b) contacting said solid or slurry or solution with an aqueous solution of alkali metal hydroxide, wherein the molar ratio of alkali metal ions to nitrile groups is in the range of from 0.6:1 to 0.95:1, (c) reacting said compound according to general formula (II a) with said alkali metal hydroxide.