초록 ▼

A lithium exchanged zeolite X adsorbent blend with improved performance characteristics produced by preparing a zeolite X, preparing a binder which includes highly dispersed attapulgite fibers wherein the tapped bulk density of the highly dispersed attapulgite fibers measured according to DIN/ISO 78

A lithium exchanged zeolite X adsorbent blend with improved performance characteristics produced by preparing a zeolite X, preparing a binder which includes highly dispersed attapulgite fibers wherein the tapped bulk density of the highly dispersed attapulgite fibers measured according to DIN/ISO 787 is more than about 550 g/ml, mixing the zeolite X with the binder to form a mixture, forming the mixture into a shaped material, ion exchanging the zeolite X at least 75% with lithium ions, and calcining the shaped material.

대표청구항 ▼

The invention claimed is: 1. A composition for the generation of oxygen from a gaseous mixture comprising a zeolite X blended with a binder comprising highly dispersed attapulgite fibers, wherein the tapped bulk density of the highly dispersed attapulgite fibers, as measured according to DIN/ISO 78

The invention claimed is: 1. A composition for the generation of oxygen from a gaseous mixture comprising a zeolite X blended with a binder comprising highly dispersed attapulgite fibers, wherein the tapped bulk density of the highly dispersed attapulgite fibers, as measured according to DIN/ISO 787, is more than about 500 g/l and wherein cations of the zeolite X comprise at least about 75% lithium cations. 2. The composition of claim 1, wherein the cations of the zeolite X comprise at least about 95% lithium cations. 3. The composition of claim 1, wherein the zeolite X comprises low silica zeolite X. 4. The composition of claim 1, wherein the zeolite X has a silicon:aluminum ratio from about 1.0 to about 1.25. 5. The composition of claim 1, wherein the zeolite X has a silicon:aluminum ratio from about 1.0 to about 1.05. 6. The composition of claim 1, wherein the binder comprises from about 2 to about 30% of the composition, by weight. 7. The composition of claim 1, wherein the binder comprises from about 5 to about 20% of the composition, by weight. 8. The composition of claim 1, wherein from about 0.1% up to about 25% of the cations of the zeolite X comprise divalent cations. 9. The process of claim 8, wherein the divalent cations are selected from the group consisting of zinc, alkaline earth metals and mixtures thereof. 10. The composition of claim 1, wherein from about 0.1 to about 25% of the cations of the zeolite X comprise trivalent cations. 11. The composition of claim 10, wherein the trivalent cations comprise rare earth metal cations. 12. The composition of claim 11, wherein the rare earth metal comprise lanthanum. 13. The composition of claim 1, wherein the binder comprises at least about 5% highly dispersed attapulgite fibers, by weight. 14. The composition of claim 1, wherein the binder further comprises a clay material selected from the group consisting of conventional attapulgite, kaolin, montmorillonite and bentonite and mixtures thereof. 15. A process for production of a lithium exchanged zeolite X/binder blend absorbent product comprising preparing a zeolite X, preparing a binder comprising highly dispersed attapulgite fibers, wherein the tapped bulk density of the highly dispersed attapulgite fibers, as measured according to DIN/ISO 787, is more than about 550 g/l; mixing the zeolite X with the binder to prepare a zeolite X/binder blend, ion exchanging the zeolite X component of the blend with lithium ions to a level of at least about 75%; and treating the blend to form the absorbent product. 16. The process of claim 15, wherein the zeolite X is ion exchanged at least about 95% with lithium cations. 17. The process of claim 15, wherein the zeolite X comprises low silica zeolite X. 18. The process of claim 15, wherein the zeolite X has a silicon:aluminum ratio from about 1.0 to 1.25. 19. The process of claim 15, wherein the binder comprises from about 2 to about 30% of the mixture by weight. 20. The process of claim 15 from about 0.1% up to about 25% of the cations of the zeolite X comprise divalent cations. 21. The process of claim 15, wherein from about 0.1% up to about 25% of the cations of the zeolite X comprise trivalent cations. 22. The process of claim 15, wherein the binder comprises at least about 5% highly dispersed attapulgite fibers, by weight. 23. The process of claim 15, wherein the binder further comprises clay materials selected from the group consisting of conventional attapulgite, kaolin, montmorillonite and bentonite and mixtures thereof. 24. A process for separation of oxygen from a gaseous mixture containing oxygen comprising passing the gaseous mixture over the absorbent blend composition of claim 1.