公开(公告)号：US20240294463A1

公开(公告)日：2024-09-05

申请号：US18268115

申请日：2021-12-08

Applicant: BASF SE

Inventor： Michael Klemens MUELLER ,  Matthias VOGES ,  Markus HARTMANN ,  Frank JAEKEL ,  Astrid SCHMIDT

IPC: C07C227/44

CPC classification number: C07C227/44

Abstract: Process for making a solid alkali metal salt (A) of an aminocarboxylate complexing agent, said process comprising the steps of



(a) providing a 40 to 80% by weight aqueous solution or slurry comprising salt (A),
(b) optionally, heating said slurry or solution to a temperature in the range of from 50 to 150° C.,
(c) introducing the slurry or solution from step (a) or, if applicable, step (b) into an essentially horizontal cylindrical drying apparatus containing a stirring element that rotates around an essentially horizontal axis and that is charged with solid particles of salt (A), and
(d) removing most of the water by evaporation,
(e) removing solid salt (A) as granule.

公开(公告)号：US20230092844A1

公开(公告)日：2023-03-23

申请号：US17800758

申请日：2021-02-11

Applicant: BASF SE

Inventor： Matthias VOGES ,  Lothar SEIDEMANN ,  Anika RITTER ,  Astrid SCHMIDT ,  Markus HARTMANN ,  Hartmut KOENIG ,  Frank JAEKEL ,  Rou Hua CHUA ,  Michael Klemens MUELLER

IPC: C07C227/42

Abstract: Process for making solid methylglycine diacetate (MGDA) alkali metal salt (A), said process comprising the steps of (a) providing a 40 to 60% by weight aqueous solution of said salt (A) having a temperature in the range of from 50 to 90° C., (b) crystallizing salt (A), (c) removing said crystalline salt (A) from the mother liquor by filtration, and (d) subjecting the water containing filter cake from step (c) to an extrusion step.

公开(公告)号：US20220154112A1

公开(公告)日：2022-05-19

申请号：US17599766

申请日：2020-03-20

Applicant: BASF SE

Inventor： Frank JAEKEL ,  Michael Klemens MUELLER ,  Astrid SCHMIDT

IPC: C11D17/06 ,  C11D11/02 ,  C11D11/00 ,  C11D3/08 ,  C11D3/33 ,  C11D3/37 ,  C11D3/39

Abstract: Process making a powder or granule containing (A) at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and of glutamic acid diacetate (GLDA) and of iminodisuccinic acid (IDS), (B) at least one alkali metal silicate, and (C) at least one (co)polymer containing carboxylic acid group, partially neutralized with alkali, in a weight ratio of (A):[(B)+(C)] of from 20:1 up to 100:1, wherein said powder or granule contains at least 75% by weight of chelating agent (A), said process comprising the steps of (a) mixing the at least one chelating agent (A) and the at least one alkali metal silicate (B) and the at least one (co)polymer (C) in the presence of water, (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125° C.

公开(公告)号：US20210317392A1

公开(公告)日：2021-10-14

申请号：US17280066

申请日：2019-09-16

Applicant: BASF SE

Inventor： Frank JAEKEL ,  Astrid SCHMIDT ,  Michael Klemens MUELLER

IPC: C11D11/00 ,  C11D17/06 ,  C11D3/33 ,  C11D1/04 ,  C11D3/39 ,  B01J2/04 ,  B01J2/16

Abstract: Process for making a powder or granule containing (A) at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and of glutamic acid diacetate (GLDA) and of iminodisuccinic acid (IDS), (B) at least one alkali metal salt of a C10-C20 fatty acid, in a weight ratio of (A):(B) of from 40:1 up to 1,000:1, wherein said powder or granule contains at least 75% by weight of chelating agent (A), said process comprising the steps of (c) mixing the at least one chelating agent (A) and the at least one alkali metal salt of fatty acid (B) in the presence of water, (d) removing most of said water by spray-drying or by spray granulation using a gas with an inlet temperature of at least 125° C.