Invention Grant
- Patent Title: Process for the preparation of a mixture of chelating agents, mixture of chelating agents and methods of using them
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Application No.: US16627055Application Date: 2018-06-27
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Publication No.: US11225456B2Publication Date: 2022-01-18
- Inventor: Reijo Aksela , Jonas Konn , Anna-Maija Perander , Anna Haarala , Riitta Ilmoniemi , Hanna Hoffren
- Applicant: Kemira Oyj
- Applicant Address: FI Helsinki
- Assignee: Kemira Oyj
- Current Assignee: Kemira Oyj
- Current Assignee Address: FI Helsinki
- Agency: Meunier Carlin & Curfman LLC
- Priority: FI20175632 20170630
- International Application: PCT/FI2018/050505 WO 20180627
- International Announcement: WO2019/002685 WO 20190103
- Main IPC: C07C227/16
- IPC: C07C227/16 ; C07C229/12 ; D21C9/10
Abstract:
The present invention relates to a process for in situ the preparation of mixtures of chelating agents by catalyzed reactions of diethanolamine derivatives with maleic acid and then with 2-halocarboxylic acid, to mixtures of chelating agents and methods using such chelating agents.
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