This invention relates to zeolitic molecular sieve compositions characterized by outstanding capability to complex multivalent cations, especially calcium. In particular, the invention relates to novel zeolitic molecular sieve compositions, especially those based on molecular sieves having a high alumina-to-silica...http://www.google.co.uk/patents/US5948383?utm_source=gb-gplus-sharePatent US5948383 - Hybrid zeolite-silica compositions
