Patent ID: 6143066
Filing Date: 2000-11-07
Classification: C01B,C01P,C08K,C09C

Abstract:
A precipitated silica having:a CTAB specific surface of between 90 and 250 m.sup.2 /g,a DOP oil uptake lower than 300 ml/100 g,a pore distribution and a pore volume such that the pore volume consisting of the pores whose diameter is between 175 and 275 .ANG. represents less than 50% of the pore volume consisting of the pores of diameters which are smaller than or equal to 400 .ANG., anda zinc content of between 1 and 5% by weight, said silica being in the form selected from the group consisting of spherical beads with a mean size of at least 80 .mu.m, a powder with a mean size of at least 15 .mu.m, and granules of at least 1 mm in size.