Process for producing a free-flowing and storage-stable...

Details Process for producing a free-flowing and storage-stable... Process for producing a free-flowing and storage-stable...

B - Operations, Transporting

01

J

B01J 2/30 (2006.01) C07C 227/44 (2006.01) C11D 3/33 (2006.01) C11D 3/37 (2006.01)

Patent

CA 2690332

A process is proposed for producing a free-flowing and storage-stable solid comprising essentially .alpha.-alanine- N,N-diacetic acid and/or one or more derivatives of .alpha.-alanine-N,N- diacetic acid proceeding from a powder of .alpha.-alanine-N,N-diacetic acid and/or one or more derivatives of .alpha.-alanine-N,N-diacetic acid by a. compacting the powder of .alpha.-alanine-N,N-diacetic acid on a roller press to obtain slugs, b. crushing the slugs and c. screening the crushed slugs, which comprises performing the compaction on the roller press with addition of polyethylene glycol with a melting point greater than 35°C.

L'invention propose un procédé de préparation d'un solide versable et stable à l'entreposage, qui contient essentiellement de l'acide a-alanine-N,N-diacétique et/ou un ou plusieurs dérivés de l'acide a-alanine-N,N-diacétique, à partir d'une poudre d'acide a-alanine-N,N-diacétique et/ou d'un ou plusieurs dérivés de l'acide a-alanine-N,N-diacétique, par a. compactage de la poudre d'acide a-alanine-N,N-diacétique dans une presse à cylindre pour obtenir des écailles, b. rupture des écailles et c. tamisage des écailles rompues, ledit procédé étant caractérisé en ce que le compactage est réalisé dans une presse à cylindre avec addition d'un polyéthylène glycol dont le point de fusion est supérieur à 35°C.

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