公开(公告)号：US20240158409A1

公开(公告)日：2024-05-16

申请号：US18279903

申请日：2022-02-24

Applicant: BASF SE

Inventor： Rene KOENIG ,  Frank NIED

IPC: C07D487/16 ,  C09K21/10

CPC classification number: C07D487/16 ,  C09K21/10

Abstract: A process for preparing a purified product consisting essentially of a melamine condensation product or a salt thereof is provided, the process comprising the steps of a) contacting a raw product comprising a melamine condensation product and an inorganic catalytic residue with an acid having a pKa≤3 to form an acidic mixture; b) separating the inorganic catalytic residue from the acidic mixture of step a), and c) obtaining a purified product consisting essentially of a melamine condensation product, wherein the content of the inorganic catalytic residue is at most 2 wt %, based on the total weight of the purified product. The purified product, obtainable by said process, is suitable for use as a flame retardant, especially in plastics, or as a regenerator for nitriding a salt bath.