Invention Grant
- Patent Title: Process to prepare a chelating agent or precursor thereof using a cyanide salt
- Patent Title (中): 使用氰化物盐制备螯合剂或其前体的方法
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Application No.: US13322720Application Date: 2010-06-03
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Publication No.: US09334232B2Publication Date: 2016-05-10
- Inventor: Hans Lammers , Martin Heus , Tjerk Oedse Boonstra , Adrianus Maria Reichwein
- Applicant: Hans Lammers , Martin Heus , Tjerk Oedse Boonstra , Adrianus Maria Reichwein
- Applicant Address: NL Amersfoort
- Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
- Current Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
- Current Assignee Address: NL Amersfoort
- Agent Sandra B. Weiss
- Priority: EP09162119 20090605; EP09175559 20091110
- International Application: PCT/EP2010/057776 WO 20100603
- International Announcement: WO2010/139755 WO 20101219
- Main IPC: C07C227/18
- IPC: C07C227/18 ; C07C253/30 ; C07C253/08 ; C07C229/24
Abstract:
The present invention relates to a process comprising the reaction of a cyanide with an amino acid and an aldehyde, characterized in that the cyanide is a cyanide salt, the amino acid is aspartic acid and/or glutamic acid in the acidic form, and the process is performed under acidic pH by the addition of between 0 and 1 equivalent of an acid based on the amount of aspartic or glutamic acid.
Public/Granted literature
- US20120142964A1 PROCESS TO PREPARE A CHELATING AGENT OR PRECURSOR THEREOF USING A CYANIDE SALT Public/Granted day:2012-06-07
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