C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 65/11 (2006.01) C07C 51/00 (2006.01)
Patent
CA 2356928
Granules of 2-hydroxynaphthalene-3-carboxylic acid, characterized as having an average particle diameter of 150 µm or more and a hardness of 70g to 3000g; and a method for preparing said granules, characterized as comprising subjecting a powder of 2-hydroxynaphthalene-3-carboxylic acid to dry compression to give a formed product, crushing the product and classifying the crushed product. The granules of 2-hydroxynaphthalene-3-carboxylic acid is significantly reduced in scattering property.
La présente invention concerne des granules d'acide 2-hydroxynaphtalène-3-carboxylique qui se caractérisent par un diamètre particulaire moyen supérieur ou égal à 150 microns et une dureté comprise entre 70 g et 3000 g; ainsi qu'un procédé de préparation desdits granules, le procédé consistant à soumettre une poudre d'acide 2-hydroxynaphtalène-3-carboxylique à une compression à l'état sec pour obtenir un produit façonné, puis à tasser/écraser le produit et enfin à classifier le produit tassé. La propriété de diffusion des granules d'acide 2-hydroxynaphtalène-3-carboxylique est significativement réduite.
Izumichi Nobutaka
Kitayama Masaya
Kittaka Masaharu
Nara Syungo
Ueno Ryuzo
Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
Kirby Eades Gale Baker
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