公开(公告)号：US20210179978A1

公开(公告)日：2021-06-17

申请号：US17052364

申请日：2019-04-25

Applicant: BASF SE

Inventor： Marta REINOSO GARCIA ,  Juergen DETERING ,  Carsten SUELING ,  Kati SCHMDT ,  Michael Klemens MUELLER ,  Gazi TUERKOGLU ,  Thomas SCHMIDT

IPC: C11D11/02 ,  C11D11/00 ,  C11D17/06 ,  C11D3/33 ,  C11D3/37 ,  C11D3/12

Abstract: Process for manufacturing granules or powders comprising the steps of (a) providing an aqueous solution or slurry of (A) at least one chelating agent according to general formula (I a) [CH3—CH(COO)—N(CH2—COO)2]M3-XHX (I a) wherein M is selected from alkali metal cations and ammonium, same or different, and x is in the range of from 0.01 to 1.0 or (I b) [OOC—CH2CH2—CH(COO)—N(CH2—COO)2]M4-XHX (I b) wherein M is as defined above, and x in formula (I b) is in the range of from 0.01 to 2.0, and (B) at least one polymer selected from (B1) polyaspartates with an average molecular weight Mw in the range of from 1,000 to 20,000 g/mole, and (B2) copolymers comprising, in copolymerized form, (α) at least one ester of an ethylenically unsaturated mono- or dicarboxylic acid, and (β) at least one ethylenically unsaturated N-containing monomer, and (b) spray drying or granulating said solution or slurry.