Preparation of iminodiacetic acid compounds from...

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 227/02 (2006.01) C07C 227/18 (2006.01) C07C 229/16 (2006.01)

Patent

CA 2408839

This invention is directed to a process for making an iminodiacetic acid compound from a monoethanolamine compound having the following formula (I) wherein R1 is hydrogen, hydrocarbyl, or substituted hydrocarbyl. In one embodiment, the process comprises contacting the monoethanolamine substrate with a cyanide source and a formaldehyde source to form a N-cyanomethylated monoethanolamine intermediate, and contacting the N-cyanomethylated monoethanolamine intermediate with a hydroxide source and a metal-containing catalyst to form the iminodiacetic acid compound.

L'invention concerne un procédé permettant de fabriquer un composé d'acides iminodiacétiques à partir d'un composé monoéthanolamine représenté par la formule (I) dans laquelle R?1¿ représente hydrogène, hydrocarbyle, ou hydrocarbyle substitué. Dans un mode de réalisation, le procédé consiste à mettre en contact le substrat monoéthanolamine avec une source de cyanure et une source de formaldehyde afin de former un intermédiaire monoéthanolamine N-cyanométhylé, puis à mettre en contact cet intermédiaire avec une source d'hydroxyde et un catalyseur à teneur en métal de manière à former un composé d'acides iminodiacétiques.

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