Patent ID: 8685283

Claim:
Superficially porous particles, comprising: solid cores having a size ranging from about 20% to about 99% of the size of the entire particles; substantially porous outer shells having ordered pores with a median pore size ranges from about 15 to about 1000 â„« with a pore size distribution (one standard deviation) of no more than 30% of the median pore size, wherein the ordered pores produce at least one X-ray diffraction peak between 0.01Â° and 10Â° of the 2Î¸ scan range; wherein the particles have a specific surface area of from about 5 to about 1000 m 2 /g; wherein the particles have a median size range from about 0.5 Î¼m to about 100 Î¼m with a particle size distribution (one standard deviation) of no more than 15% of the median particle size; wherein the particles comprise a metal oxide selected from silica, alumina, titania or zirconia.