Modified Metal-Organic Framework (MOF) Compositions, Process of Making and Process of Use Thereof

The process of claim 9 wherein said acid is selected from formic acid, hydrochloric acid, nitric acid, sulfuric acid, and mixtures thereof to provide a MOF with a free amine.

A process for preparing a metal-impregnated metal-organic framework (MOF) comprising providing a MOF comprising metal ion corner atoms where the metal (M) is selected from Zr, V, Al, Fe, Cr, Ti, Hf, Cu, Zn, Ni, Hf, In, Ce, and mixtures thereof and linker molecules connecting metal ion corner atoms, the linker molecules selected from at least one organic ligand containing an aryl amino group or a combination of at least one organic ligand containing an aryl amino group and at least one organic ligand that does not contain an aryl amino group;

• and contacting the MOF with a solution of an inorganic metal (M′) salt wherein the metal (M′) is selected from Li, Na, K, Mg, Ca, Sr, Ba, Mn, Sc, Y, Ti, Zr, Hf, V, Cr, Mo, W, Fe, Co, Ni, Cu, Ag, Zn, Cd, Al, Ga, In, Sn, Pb, and mixtures thereof;
• mixing the inorganic metal (M′) salt solution for a time sufficient to impregnate the MOF with the metal (M′);
• and drying the impregnated MOF, to yield a metal-impregnated MOF composition characterized in that it has a static ammonia capacity of at least 4 mmol/g measured at 10 Torr and 25° C., and substantially retains its capacity for acidic TICs relative to the non-impregnated MOF.