US3914383A
Expired / Lapsed
US
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Dy zeolite hydrocarbon conversion catalyst
Assignee: Sun Research and Development Co
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Filing: 1972-08-18
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Granted: 1975-10-21
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Expires: 1992-08-18
Abstract
Abstract A Dy-alumino-silicate catalyst, useful for hydrocarbon conversion reactions, is chemically characterized by the empirical formula Mx(A102)x(SiO2)y.(H2O)z, where x, y and z are integers, the ratio x:y being usually from 1.0 to 0.2 and where at least 25% (and preferably more than 40%) of the negative charge associated with the aluminum of the alumino-silicate framework is satisfied by a cation of Dy or a cation of an oxide or a hydroxide of Dy. Preferably, upon ignition analysis the catalyst will evolve from 1 to 6 molecules of water (typically 1.5-2.5molecules) for each atom of Dy in the catalyst. Typically the negative charge associated with the zeolite framework is not completely satisfied by cations containing Dy and the balance of cations necessary for electronic equivalency comprise H or cations of metals, metal oxides or metal hydroxides. The zeolite also contains less than one alkali metal cation for every four atoms of aluminum in the framework. The zeolite can be amorphous, but preferably is at least partially crystalline and can adsorb benzene.
Inventors
- 👤 Francis William Kirsch
- 👤 David S Barmby
- 👤 John D Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:08
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/085; B01J29/088; B01J29/061; B01J29/084; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
215 words
A DY ALUMINO-SULICATE ZEOLITE WHICH IS CHEMICALLY CHARACTERIZED BY THE EMPIRICAL FORMULA MX(AIO2)X(SIO2)Y(H2O)Z, WHERE X, Y AND Z ARE INTEGERS, THE RATIO X/Y BEING FROM 1.0 TO 0.2 AND WHERE M IS CHOSEN FROM THE FOLLOWING GROUPS: A. AT LEAST ONE DY+3 CATION FOR EVERY 12 ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE FRAMEWORK OF SAID ZEOLITE, B. AT LEAST ONE CATION OF DY(OH)+2 FOR EVERY EIGHT ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE FRAMEWORK OF SAID ZOELITE, C. AT LEAST ONE CATION OF DY(OH)2+1 FOR EVERY FOUR ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE FRAMEWORK OF SAID ZEOLITE, OR D. A COMBINATION OF THE MEMBERS OF AT LEAST TWO OF THE ABOVE GROUPS, AND WHEREIN SAID TERM "M", THE BALANCE OF THE CATIONS, IF NECESSARY FOR ELECTRONIC EQUIVALENCY OF THE ZEOLITE, COMPRISE H* OR CATIONS OF OTHER METALS, METAL OXIDES OR METAL HYDROXIDES AND WHEREIN THERE IS LESS THAN ONE ALKALI METAL CATION FOR EVERY ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE PORTION OF SAID ZEOLITE AND WHEREIN SAID ZEOLITE HAS NOT BEEN CONTACTED WITH STEAM AT A TEMPERATURE ABOVE 1150*F AND WHEN SAID ZEOLITE IS ANALYZED BY IGNITION AT 1800*F., AT LEAST 1.0 MOLECULES OF WATER IS OBTAINED FOR EACH ATOM OF DY IN SAID ZEOLITE, SAID ZEOLITE BEING USEFUL AS A CATALYST FOR HYDROCARBON CONVERSION REACTIONS.
Claim 2
Dependent Claim
215 words
A DY ALUMINO-SULICATE ZEOLITE WHICH IS CHEMICALLY CHARACTERIZED BY THE EMPIRICAL FORMULA MX(AIO2)X(SIO2)Y(H2O)Z, WHERE X, Y AND Z ARE INTEGERS, THE RATIO X/Y BEING FROM 1.0 TO 0.2 AND WHERE M IS CHOSEN FROM THE FOLLOWING GROUPS: A. AT LEAST ONE DY+3 CATION FOR EVERY 12 ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE FRAMEWORK OF SAID ZEOLITE, B. AT LEAST ONE CATION OF DY(OH)+2 FOR EVERY EIGHT ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE FRAMEWORK OF SAID ZOELITE, C. AT LEAST ONE CATION OF DY(OH)2+1 FOR EVERY FOUR ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE FRAMEWORK OF SAID ZEOLITE, OR D. A COMBINATION OF THE MEMBERS OF AT LEAST TWO OF THE ABOVE GROUPS, AND WHEREIN SAID TERM "M", THE BALANCE OF THE CATIONS, IF NECESSARY FOR ELECTRONIC EQUIVALENCY OF THE ZEOLITE, COMPRISE H* OR CATIONS OF OTHER METALS, METAL OXIDES OR METAL HYDROXIDES AND WHEREIN THERE IS LESS THAN ONE ALKALI METAL CATION FOR EVERY ATOMS OF ALUMINUM IN THE ALUMINO-SILICATE PORTION OF SAID ZEOLITE AND WHEREIN SAID ZEOLITE HAS NOT BEEN CONTACTED WITH STEAM AT A TEMPERATURE ABOVE 1150*F AND WHEN SAID ZEOLITE IS ANALYZED BY IGNITION AT 1800*F., AT LEAST 1.0 MOLECULES OF WATER IS OBTAINED FOR EACH ATOM OF DY IN SAID ZEOLITE, SAID ZEOLITE BEING USEFUL AS A CATALYST FOR HYDROCARBON CONVERSION REACTIONS.
Claim 3
Dependent Claim
68 words
The zeolite of claim 1 wherein said zeolite is at least 50% crystalline, said crystalline portion being capable of adsorbing benzene, and wherein at least 50% of the electronegativity associated with the aluminum of said framework is satisfied by a cation containing dysprosium or by a combination of cations containing dysprosium and cerium wherein the dysprosium cations comprise at least 60% of the charge associated with said combination.
Claim 4
Dependent Claim
69 words
Zeolite according to claim 1 wherein said zeolite is analyzed by ignition at 1800*F., from 1.0 to 6 molecules of water is obtained for each atom of Dy in said zeolite, and wherein said zeolite is crystalline and capable of adsorbing benzene, has an atomic ratio Al/Si of 0.65 to 0.35 and contains at least one Dy (OH)2 cation for every 8 atoms of aluminum in the alumino-silicate framework.
Claim 5
Dependent Claim
44 words
Zeolite according to claim 1 wherein said alumino-silicate zeolite has an X-ray diffraction pattern which evidences at least some degree of crystallinity and wherein the atomic ratio Al/Si of the alumino-silicate framework of said crystalline portion of said zeolite is from 0.65 to 0.35.
Claim 6
Dependent Claim
25 words
The zeolite of claim 1 wherein in the range of 50-70% of the cationic charge necessary for electronic equivalency is satisfied by said dysprosium cations.
Claim 7
Dependent Claim
99 words
A Dy alumino-silicate zeolite which is chemically characterized by the formula A1(Na2O):A2:A3(H2O):c(Dy2/3O):Al2O3:e(SiO2) wherein A1 is in the range of 0.01-0.2, A2 is in the range of 0.0-0.3 c is in the range of 0.5-0.7 and e is in the range of 4.5-5.0, the sum of A1+A2+A3+c+e being in the range of 0.9-1.0 and wherein the balance of the cations, if necessary, for electronic equivalency of said zeolite comprise cations of metals, metAl oxides or metal hydroxides other than NaNH4 H or cations of dysprosium, and wherein said zeolite has not been contacted with steam at a temperature above 1150*F.
Claim 8
Dependent Claim
99 words
A Dy alumino-silicate zeolite which is chemically characterized by the formula A1(Na2O):A2:A3(H2O):c(Dy2/3O):Al2O3:e(SiO2) wherein A1 is in the range of 0.01-0.2, A2 is in the range of 0.0-0.3 c is in the range of 0.5-0.7 and e is in the range of 4.5-5.0, the sum of A1+A2+A3+c+e being in the range of 0.9-1.0 and wherein the balance of the cations, if necessary, for electronic equivalency of said zeolite comprise cations of metals, metAl oxides or metal hydroxides other than NaNH4 H or cations of dysprosium, and wherein said zeolite has not been contacted with steam at a temperature above 1150*F.
Claim 9
Dependent Claim
46 words
The zeolite of claim 6 wherein A2 is in the range of 0.001-0.015 and at least 1.0 molecules of water is obtained for each atom of Dy in said zeolite on ignition analysis at 1800*F., said zeolite being useful as a catalyst for hydrocarbon conversion reactions.
Claim 10
Dependent Claim
30 words
The zeolite of claim 6 wherein when said zeolite is analyzed by ignition at 1800*F., at least 1.5 molecules of water is obtained for each Dy atom in said zeolite.
Claim 11
Dependent Claim
21 words
The zeolite of claim 6 wherein said zeolite has an X-ray diffraction pattern which evidences at least some degree of crystallinity.
Claim 12
Dependent Claim
16 words
The zeolite of claim 8 wherein said zeolite is at least 50% crystalline by X-ray analysis.
Claim 13
Dependent Claim
20 words
The zeolite of claim 10 and having a weight loss of at least 3% when analyzed by ignition at 1800*F.
Claim 14
Dependent Claim
13 words
The zeolite of claim 6 wherein A3 is in the range of 0.0-0.5.
References Cited (Backward Citations)
US3508867A
Cited
US3251902A
Cited
US3277018A
Cited
US3324048A
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US3437604A
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US3396203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |