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1. WO2012055991 - COMPLEX OF DIVALENT METAL CATIONS AND CHELATING AGENT

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[ EN ]

Claims

Complex of two divalent metal cations and a chelating agent chosen from the group of EDDHA (ethylenediamine-N,N'-di-(hydroxyphenyl acetic acid)), EDDHMA (ethylenediamine-N,N'-di-(hydroxy-methylphenyl acetic acid)), and HBED (N,N'-bis(hydroxybenzyl)ethylenediamine-N,N'-diacetic acid), and derivatives of EDDHA, EDDHMA and HBED that are substituted with alkyl or alkoxy groups, preferably substituted with one or more C1 -C8 alkyl or alkoxy groups on the phenyl.

Complex of claim 1 wherein the chelating agent is chosen from the group of EDDHA (ethylenediamine-N,N'-di-(hydroxyphenyl acetic acid)), EDDHMA (ethylenediamine-N,N'-di-(hydroxy-methylphenyl acetic acid)), and HBED (N,N'-bis(hydroxybenzyl)ethylenediamine-N,N'-diacetic acid).

Complex of claim 1 or 2 wherein the divalent metal cation is Mn2+, Cu2+ or Zn2+, preferably Zn2+

Complex of any one of claims 1 to 3 wherein the chelating agent is o,o- EDDHA, o,p-EDDHA, o,o-EDDHMA, or ο,ο'-EDDHMA.

Process to prepare the complex of any one of preceding claims 1 to 4 comprising the steps of adding the chelating agent and a soluble salt of the divalent metal cation to an aqueous solution at a neutral pH, allowing a precipitate to form, and, optionally, separating off the precipitate from the solution.

6. Use of complex of any one of claims 1 to 4 in plant nutrition compositions.

7. Plant nutrition composition containing the complex of any one of preceding claims 1 to 4 and one or more of a carrier, liquid, surfactant, a P source, a K source or a N source.

8. Use of a complex of any one of claims 1 to 4 as an algaecide, a bactericide, a herbicide, an insecticide, a molluscicide, a virucide or a fungicide, other than a fungicide or bactericide used for personal care.