Synthetic crystalline zeolite and process for preparing same
AssigneeUnion Carbide Corporation
InventorsEdith Flanigen, Elsa R. Kellberg
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Abstract
A new three-dimensional crystalline zeolite having unique adsorptive properties is prepared hydrothermally from a reaction gel containing tetramethylammonium hydroxide in addition to a source of silica and alumina and sodium hydroxide. The zeolite as crystallized from the reaction system contains tetramethylammonium cations in addition to sodium cations. The zeolite is denominated zeolite .OMEGA..
Claims6
A crystalline synthetic zeolitic molecular sieve having a composition expressed in terms of moles of oxides as
- 1.0.+-.0.5M.sub.2/n O:Al.sub.2 O.sub.3 :5-20SiO.sub.2 :0-10H.sub.2 O
- wherein M represents at least one action having a valence "n", and having an x-ray powder diffraction pattern essentially as set forth in Table A.
A crystalline synthetic zeolitic molecular sieve having a composition expressed in terms of moles of oxides as follows:
- [xR.sub.2 O+yM.sub.2/n O]:Al.sub.2 O.sub.3 :zSiO.sub.2 :aH.sub.2 O,
- wherein R represents hydrogen, ammonium, alkylammonium or mixtures thereof, x has a value of from about 0 to about 0.7, m represents at least one alkali metal, alkaline earth metal, transition metal or rare earth element of the lanthanide series, n is the valence of M, y has a value of from about 0.5 to about 1.5, the sum of x and y being from about 0.5 to about 1.5, z represents the number of moles of SiO.sub.2 and has a value of from about 5 to about 20, and a has a value of from about zero to about 10, said zeolitic molecular sieve having an x-ray powder diffraction pattern essentially as set forth in Table A.
A porous crystalline synthetic zeolitic molecular sieve aluminosilicate having uniform pore diameters of at least 11 Angstroms, and aluminosilicate containing at least some structural tetramethylammonium cations and having an x-ray powder diffraction pattern characterized by at least those interplanar spacing values set forth in Table A.
A crystalline synthetic zeolitic molecular sieve having a composition expressed in terms of oxides as
- 1.0.+-.0.5M.sub.2/n :Al.sub.2 O.sub.3 :5-12SiO.sub.2 :0-10H.sub.2 O
- wherein M represents at least one cation having a valence of "n" and having an x-ray powder diffraction pattern essentially as set forth in Table A.
Dependencies are inferred from the claim text.