Granule of parahydroxybenzoic acid or parahydroxybenzoic ester and process for producing the same
AssigneeKabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
InventorsRyuzo Ueno, Masaya Kitayama, Nobutaka Izumichi, Masaharu Kittaka
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Abstract
Granular product of parahydroxybenzoic acid or its ester which exhibits well suppressed dusting and caking tendency and a process for preparing the product are provided. The granular product of parahydroxybenzoic acid or its ester according to the instant invention has an average particle size of equal to or more than 150 μm and a hardness of 10-3000 g. The granular product of the invention can be prepared by dry compressing powdery parahydroxybenzoic acid or its ester to give compressed material, pulverizing and classifying the material.
Claims11
A granular product of parahydroxybenzoic acid or its ester, characterized in that having an average particle size of equal to or more than 150 μm and a hardness of 10-3000 g.
Dependencies are inferred from the claim text.