公开(公告)号：US20230382845A1

公开(公告)日：2023-11-30

申请号：US18324271

申请日：2023-05-26

申请人： NOURYON CHEMICALS INTERNATIONAL B.V.

发明人： Edwin Rudolf Antony BANG ,  Martin HEUS ,  Tjerk Oedse BOONSTRA

IPC分类号： C07C227/16

CPC分类号： C07C227/16

摘要： This disclosure provides a chelating composition having a pH of at least about 9 and comprising: water; and the tetrasodium salt of glutamic acid N,N-diacetic acid present in an amount of at least about 50 weight percent based on a total weight of the chelating composition as determined using an Fe-Total Sequestering Value, wherein the chelating composition has a viscosity of less than about 1350 mPa·s measured at about 5° C., or less than about 350 mPa·s measured at about 20° C., each using a Brookfield DV II plus viscometer with spindle S18 and a temperature controlled bath.

公开(公告)号：US20230382846A1

公开(公告)日：2023-11-30

申请号：US18324281

申请日：2023-05-26

申请人： NOURYON CHEMICALS INTERNATIONAL B.V.

发明人： Edwin Rudolf Antony BANG ,  Martin HEUS ,  Tjerk Oedse BOONSTRA

IPC分类号： C07C227/16

CPC分类号： C07C227/16

摘要： A method includes combining monosodium glutamate and/or glutamic acid with formaldehyde to form a first combination; adding hydrogen cyanide to form a second combination comprising a monosodium salt of glutamic acid diacetonitrile, a cyclic GLMN, and a sodium salt of glutamic acid N-monoacetonitrile, maintaining a temperature of the second combination at less than about 16° C. and a pH of less than about 7; converting nitrile groups to carboxylate groups thereby forming a third combination comprising water and at least about 47 weight percent of the tetrasodium salt of GLDA, wherein a reaction yield is at least about 91%; providing a fourth combination comprising water and the tetrasodium salt of GLDA and having a pH of less than about 7; and combining the third and fourth combinations to form the chelating composition.

公开(公告)号：US20230382847A1

公开(公告)日：2023-11-30

申请号：US18324285

申请日：2023-05-26

申请人： NOURYON CHEMICALS INTERNATIONAL B.V.

发明人： Edwin Rudolf Antony BANG ,  Martin HEUS ,  Tjerk Oedse BOONSTRA

IPC分类号： C07C227/16

CPC分类号： C07C227/16

摘要： A method of forming a chelating composition includes the steps of: providing a first mixture comprising water and a tetrasodium salt of glutamic acid N,N-diacetic acid and having a pH of greater than about 10; and acidifying the first mixture via ion exchange and/or bipolar membrane electrodialysis to reduce a pH of the chelating composition to a pH of at least about 9; wherein the chelating composition comprises the tetrasodium salt of glutamic acid N,N-diacetic acid in an amount of at least about 50 weight percent based on a total weight of the chelating composition as determined using an Fe-Total Sequestering Value; and wherein the chelating composition has a viscosity of less than about 1350 mPa·s measured at about 5° C., or less than about 350 mPa·s measured at about 20° C., each using a Brookfield DV II plus viscometer with spindle S18 and a temperature controlled bath.