公开(公告)号：US11028350B2

公开(公告)日：2021-06-08

申请号：US16309339

申请日：2017-06-01

Applicant: BASF SE

Inventor： Michael Klemens Mueller ,  Armin Stamm ,  Frank Jaekel ,  Carsten Sueling

IPC: C11D7/26 ,  C11D7/32 ,  C11D11/00 ,  C11D3/33 ,  C11D11/02 ,  C07C229/16 ,  C07C227/00 ,  C07C227/44 ,  C11D3/37

Abstract: Process for making a powder or granule containing at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and glutamic acid diacetate (GLDA) and iminodisuccinic acid (IDS), said process comprising the steps of (a) introducing an aqueous solution or aqueous slurry of the respective chelating agent (A) into a spray-dryer or spray-granulator, and removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of 125 to 250° C., (b) withdrawingpowder or granules, respectively, from the spray-dryer or spray-granulator, respectively, (c) separating off fines from said powder or granules, wherein said fines have a maximum particle diameter of 350 μm, (d) separating off lumps from said powder or granules, wherein said lumps have a particle diameter of 1,500 μm or more, (e) milling said lumps to a maximum particle diameter of 500 μm, (f) re-introducing said fines from step (c) and milled lumps from step (e) into the spray-dryer or spray-granulator, wherein the share of fines is in the range of from 0.5 to 20% by weight of the total chelating agent (A) withdrawn in step (b) and the share of milled lumps is in the range of from 5 to 60% by weight of the total chelating agent (A) withdrawn in step (b).

公开(公告)号：US10421711B2

公开(公告)日：2019-09-24

申请号：US16061007

申请日：2016-12-07

Applicant: BASF SE

Inventor： Constanze Franzke ,  Axel Franzke ,  Armin Stamm ,  Markus Hartmann ,  Robert Baumann

IPC: C07C227/10 ,  C07C227/18 ,  C07C227/42 ,  C07C227/02 ,  C07C229/36 ,  C11D3/33

Abstract: Process for manufacturing a crystalline alkali metal salt of the general formula (I) [R1—CH(COO)—N(CH2—COO)2]M13 (I) wherein M1 is selected from alkali metal cations, same or different, R1 is selected from C1-C4-alkyl and CH2CH2COOM1, comprising the step of (b) crystallizing said alkali metal salt from an aqueous solution containing in the range of from 5 to 30% by weight of alkali metal hydroxide, referring to said aqueous solution.

公开(公告)号：US09873659B2

公开(公告)日：2018-01-23

申请号：US15516589

申请日：2015-10-07

Applicant: BASF SE

Inventor： Marta Reinoso Garcia ,  Constanze Franzke ,  Armin Stamm

IPC: C11D3/33 ,  C07C227/42 ,  C07C229/24 ,  C07C229/16 ,  C07C227/26 ,  C11D3/20 ,  C11D3/04 ,  C11D3/10

CPC classification number: C07C229/16 ,  C07C227/26 ,  C11D3/044 ,  C11D3/046 ,  C11D3/10 ,  C11D3/2079 ,  C11D3/2082 ,  C11D3/33

Abstract: Aqueous solution containing in the range of from 60.5 to 75% by weight of a mixture of trialkalimetal salts of the L-and D-enantiomers of methyl glycine diacetic acid (MGDA), said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 3 to 97%, wherein said trialkali metal salts have the general formula (I) [CH3—CH(COO)—N(CH2—COO)2]K3−xNax (I) wherein x is in the range of from zero to 2.9.

公开(公告)号：US11485703B2

公开(公告)日：2022-11-01

申请号：US16626026

申请日：2018-06-19

Applicant: BASF SE

Inventor： Thomas Schmidt ,  Armin Stamm ,  Marta Reinoso Garcia ,  Verena Mormul ,  Michael Klemens Mueller ,  Frank Jaekel ,  Jeremy T Manning

IPC: C07C227/26 ,  C07C229/16

Abstract: The present invention is directed towards a process for manufacturing a complexing agent, said process comprising the steps of (a) Providing a nitrile according to general formula (I a) or (I b) With M being selected from alkali metal and hydrogen and combinations thereof, (b) Saponification with a total alkali amount of 2.5 to 2.9 mol of alkali metal hydroxide per mole of nitrile according to general formula (I a) or (I b), respectively, and a pH value in the range of from 9.5 to 11.5 at the end of step (b), (c) Adding an amount of alkali metal hydroxide so that the total alkali content is 2.9 to 3.15 moles per mole nitrile according to general formula (I a) or (I b), respectively, and (d) Allowing further conversion.

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.