公开(公告)号：EP2034006A4

公开(公告)日：2012-09-26

申请号：EP07708113

申请日：2007-01-31

申请人： MIZUSAWA INDUSTRIAL CHEM

发明人： HATANO MASASHI ,  HAZUMA TETSUJI ,  SAKAO KAZUNORI ,  UENO TOORU

IPC分类号： C11B3/10 ,  C01B33/40

CPC分类号： C11B3/10

摘要： A decoloring agent for fats and oils or mineral oils, comprising an activated clay obtained by treating a dioctahedral smectite clay mineral with an acid, wherein the activated clay has an average particle diameter (D 50 ) of 20 to 30 µm calculated as the volume relying upon the laser diffraction scattering method and contains fine particles of not larger than 5 µm in an amount.of not larger than 15% by volume, has a bulk density in a range of 0.60 to 0.70 g/cc, has a pore volume at pore diameters of 17 to 3,000 Å of 0.35 to 0.40 cc/g as measured relying upon the nitrogen adsorption method, and has a ratio of the bulk density and the pore volume (bulk density/pore volume) in a range of 1.55 to 1.95. The decoloring agent has excellent filtering property, high decoloring property and low oil retention.