Patent ID: 8859011

Claim:
A granulation comprising about 95% to about 99% by weight calcium carbonate, about 0.5% to about 5% by weight of a binder and about 0.03% to about 3% by weight of a porosity increasing agent selected from the group consisting of polyethylene glycol, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, alkyl sulfates, sulfosuccinates, glyceryl fatty acid esters, polyglycol fatty acid esters, poloxamers, polyoxyethylene castor oil derivatives and combinations thereof, wherein the calcium carbonate is derived from a calcite form of calcium carbonate having a tapped density (1000 taps) of about 1400 to about 1700 mg/cm 3 and the granulation has a tapped density (1000 taps) of about 800 to about 1000 mg/cm 3 .