Silicon substituted Y zeolite composition LZ-210

Claim 2

A crystalline zeolitic aluminosilicate having at least some of its original framework aluminum atoms replaced by extraneous silicon atoms and having a mole ratio of oxides in the anhydrous state of (0.85-1.1)M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2 wherein M is a cation having a valence of "n"; "x" has a value greater than 6.0; has a X-ray powder diffraction pattern having at least the d-spacings of Table A; and has extraneous silicon atoms in the crystal lattice in the form of framework SiO 4 tetrahedra.

Claim 3

A crystalline zeolitic aluminosilicate having at least some of its original framework aluminum atoms replaced by extraneous silicon atoms and having the chemical composition [Al.sub.(a-N) Si.sub.b+(N-Δz) □.sub.z ]O.sub.2 wherein Al.sub.(a-N) represents the mole fraction of aluminum tetrahedra; "a" represents the mole fraction of aluminum tetrahedra in the original zeolite; "N" represents the mole fraction of aluminum tetrahedra removed from the original zeolite; Si b+ (N-Δz) represents the mole fraction of silicon tetrahedra; "b" represents the mole fraction of silicon tetrahedra in the original zeolite; (N-Δz) represents the mole fraction of silicon tetrahedra resulting from the substitution of extraneous silicon into the crystal lattice; "Δz" represents the difference in the Defect Structure Factor between the original zeolite and the zeolite containing the extraneous silicon atoms and has a value of less than 0.08; (n-Δz)/N has a value at least 0.5; □ represents defect sites; z represents the mole fraction of defect sites; ##EQU10## has a value greater than 3.0; and has a X-ray powder diffraction patten having at least the d-spacings of Table A.

Claim 4

A crystalline zeolitic aluminosilicate having at least some of its original framework aluminum atoms replaced by extraneous silicon atoms and having the chemical composition [Al.sub.(a-N) Si.sub.b+(N-Δz) □.sub.z ]O.sub.2 wherein Al.sub.(a-N) represents the mole fraction of aluminum tetrahedra; "a" represents the mole fraction of aluminum tetrahedra in the original zeolite; "N" represents the mole fraction of aluminum tetrahedra removed from the original zeolite; Si b+ (N-Δz) represents the mole fraction of silicon tetrahedra; "b" represents the mole fraction of silicon tetrahedra in the original zeolite; (N-Δz) represents the mole fraction of silicon tetrahedra resulting from the substitution of extraneous silicon into the crystal lattice; "Δz" represents the difference in the Defect Structure Factor between the original zeolite and the zeolite containing the extraneous silicon atoms and has a value of less than 0.08; (n-Δz)/N has a value at least 0.5; □ represents defect sites; z represents the mole fraction of defect sites; ##EQU10## has a value greater than 3.0; and has a X-ray powder diffraction patten having at least the d-spacings of Table A.

Claim 5

A composition according to claim 2 wherein the value of Δz is less than 0.05.

Claim 6

The composition according to claim 1 wherein "x" is greater than 6.0 to about 8.0 and has an X-ray diffraction pattern having at least the d-spacings of Table B.

Claim 7

The composition according to claim 1 or claim 2 wherein said zeolitic aluminosilicate has a cation equivalent expressed as a monovalent cation species, M + /Al of from 0.85 to 1.1.

Claim 8

The composition according to claim 1 or claim 2 wherein "x" has a value of from greater than 6 to about 8 and the extraneous silicon atoms are present in an amount of at least 1.0 per 10,000 A 3 .

Claim 9

The composition according to claim 2 wherein said zeolitic aluminosilicate has an x-ray powder diffraction pattern containing at least the d-spacings set forth in Table B.

Claim 10

The composition according to claim 1 or claim 2 wherein said composition has a cubic unit cell dimension, a o , of less than 24.61 Angstroms.

Claim 11

The composition of claim 8 wherein the a o is from 24.2 to 24.61 Angstroms.

Claim 12

The composition of claim 9 wherein the a o is from 24.52 to 24.61 Angstroms.

Claim 13

The composition according to claim 1 or 2 wherein the extraneous silicon atoms are present in an amount of at least 1.0 per 10,000 A 3 .

Claim 14

Zeolitic aluminosilicate having a cubic crystalline structure and which in the anhydrous state composition expressed in terms of mole ratios of oxides (0.85-1.1)M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2 wherein M is a cation having a valence of "n" and "x" has a value greater than 8, having an X-ray powder diffraction pattern having at least the d-spacings of Table C and having extraneous silicon atoms in its crystal lattice in the form of framework SiO 4 tetrahedra.

Claim 15

Zeolitic aluminosilicate having a cubic crystalline structure and which in the anhydrous state composition expressed in terms of mole ratios of oxides (0.85-1.1)M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2 wherein M is a cation having a valence of "n" and "x" has a value greater than 8, having an X-ray powder diffraction pattern having at least the d-spacings of Table C and having extraneous silicon atoms in its crystal lattice in the form of framework SiO 4 tetrahedra.

Claim 16

Composition according to claim 12 wherein "x" has a value of from 9 to 60 and the extraneous silicon atoms are present in an amount of at least 1.0 per 10,000 A 3 .

Claim 17

A crystalline zeolitic aluminosilicate having at least some of its original framework aluminum atoms replaced by extraneous silicon atoms and having the chemical composition [Al.sub.(a-N) Si.sub.b+(N-Δz) □.sub.z ]O.sub.2 wherein Al.sub.(a-N) represents the mole fraction of aluminum tetrahedra; "a" represents the mole fraction of aluminum tetrahedra in the original zeolite; "N" represents the mole fraction of aluminum tetrahedra removed from the original zeolite, and has a value of at least 0.3a; Si b+ (N-Δz) represents the mole fractions of silicon tetrahedra; "b" represents the mole fraction of silicon tetrahedra in the original zeolite; (N-Δz) represents the mole fraction of silicon tetrahedra resulting from the substitution of extraneous silicon into the crystal lattice; "Δz" represents the difference in the Defect Structure Factor between the original zeolite and the zeolite containing the extraneous silicon atoms and has a value of less than 0.08; (N-Δz)/N has a value at least as great as 0.5; z represents the mole fraction of defect sites; ##EQU11## has a value of at least 4.0; has a cation equivalent expressed as a monovalent cation species, M + /Al of from 0.85 to 1.1; and having an X-ray powder diffraction pattern containing at least the d-spacings set forth in Table C.

Claim 18

A crystalline zeolitic aluminosilicate having at least some of its original framework aluminum atoms replaced by extraneous silicon atoms and having the chemical composition [Al.sub.(a-N) Si.sub.b+(N-Δz) □.sub.z ]O.sub.2 wherein Al.sub.(a-N) represents the mole fraction of aluminum tetrahedra; "a" represents the mole fraction of aluminum tetrahedra in the original zeolite; "N" represents the mole fraction of aluminum tetrahedra removed from the original zeolite, and has a value of at least 0.3a; Si b+ (N-Δz) represents the mole fractions of silicon tetrahedra; "b" represents the mole fraction of silicon tetrahedra in the original zeolite; (N-Δz) represents the mole fraction of silicon tetrahedra resulting from the substitution of extraneous silicon into the crystal lattice; "Δz" represents the difference in the Defect Structure Factor between the original zeolite and the zeolite containing the extraneous silicon atoms and has a value of less than 0.08; (N-Δz)/N has a value at least as great as 0.5; z represents the mole fraction of defect sites; ##EQU11## has a value of at least 4.0; has a cation equivalent expressed as a monovalent cation species, M + /Al of from 0.85 to 1.1; and having an X-ray powder diffraction pattern containing at least the d-spacings set forth in Table C.

Claim 19

A crystalline zeolitic aluminosilicate according to claim 14 having an x-ray powder diffraction pattern containing at least the d-spacings set forth in Table D.