Patent ID: 6475950
Filing Date: 2002-11-05
Classification: B01J,C01G,C01P,C07C

Abstract:
A composition of matter having the formula CraAbBc(O1âˆ’z(OH)2z)y, wherein a+b+c=1;wherein A is an element selected from the group consisting of Zn, Sn, Rh, Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr and Ba; wherein B is at least one element selected from the group consisting of Al, Si and Mg; wherein a is greater than 0.01 but less than 0.5; b is greater than 0.01 but less than or equal to 0.5; c is greater than 0.2 but less than or equal to 0.999; wherein y is determined by the sum of the oxidation states of Cr, A and B individually multiplied by the corresponding stoichiometric coefficent a, b, or c, and said sum then divided by 2; and z is greater than or equal to 0 but less than or equal to 2 , and when z is greater than 1 , the composition contains no oxygen as oxide.