US3929668A
Expired / Lapsed
US
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Zeolitic catalytic cracking catalysts
Assignee: Texaco Inc
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Filing: 1970-04-27
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Granted: 1975-12-30
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Expires: 1990-04-27
Abstract
Abstract There is provided a method for increasing the catalytic cracking activity, selectivity and attrition resistance of a crystalline aluminosilicate containing catalytic cracking catalyst by treating the catalyst at a temperature above about 1300*F. and below the thermal destructive temperature of the crystalline aluminosilicate in the absence of steam. The above treatment provides an improved catalytic cracking catalyst for utilization in the cracking of a hydrocarbon charge under catalytic cracking conditions.
Inventors
- 👤 Gerald V Nelson
- 👤 Douglas J Youngblood
- 👤 James H Colvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:54
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/18; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B01J2229/00; B01J2229/30; B01J2229/36; B01J2229/40; B01J2229/42; Y; Y10; Y10S; Y10S502/00; Y10S502/50; Y10S502/504; Y10S502/52
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
70 words
A PROCESS OF INCREASING THE CATALYTIC CRACKING ACTIVITY, SELECTIVELY AND ATTRITION RESISTANCE OF A CATALYTIC CRACKING CATALYST COMPRISING A ZEOLITIC CRYSTALLINE ALUMINOSILICATE IN A SILICEOUS MATRIX, SAID CATALYST HAVING BEEN RENDERED CATALYTICALLY ACTIVE PREVIOUSLY BY A PROCESS COMPRISING DRYING AND CALCINING, WHICH COMPRISES HEAT TREATING SAID CATALYST AT A TEMPERATURE ABOVE 1300*F. AND BELOW THE THERMAL DESTRUCTIVE TEMPERATURE OF SAID ZEOLITIC CRYSTALLINE ALUMINOSILICATE CONTAINED THEREIN IN THE ABSENCE OF STEAM.
Claim 2
Dependent Claim
70 words
A PROCESS OF INCREASING THE CATALYTIC CRACKING ACTIVITY, SELECTIVELY AND ATTRITION RESISTANCE OF A CATALYTIC CRACKING CATALYST COMPRISING A ZEOLITIC CRYSTALLINE ALUMINOSILICATE IN A SILICEOUS MATRIX, SAID CATALYST HAVING BEEN RENDERED CATALYTICALLY ACTIVE PREVIOUSLY BY A PROCESS COMPRISING DRYING AND CALCINING, WHICH COMPRISES HEAT TREATING SAID CATALYST AT A TEMPERATURE ABOVE 1300*F. AND BELOW THE THERMAL DESTRUCTIVE TEMPERATURE OF SAID ZEOLITIC CRYSTALLINE ALUMINOSILICATE CONTAINED THEREIN IN THE ABSENCE OF STEAM.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein said treating is conducted at a temperature of from about 1400* to about 1550*F.
Claim 4
Dependent Claim
25 words
A process according to claim 1 wherein the zeolitic crystalline aluminosilicate is selected from the group consisting of faujasite, zeolite X, zeolite Y and mordenite.
Claim 5
Dependent Claim
29 words
A process according to claim 3 wherein said zeolite crystalline aluminosilicate contains cations selected from the group consisting of hydrogen, barium, calcium, magnesium, manganese, rare earths and combinations thereof.
Claim 6
Dependent Claim
34 words
A process according to claim 1 wherein said catalyst comprises from about 1 to 25 weight percent zeolitic crystalline aluminosilicate and from about 99 to 75 weight percent of a catalytically active siliceous matrix.
Claim 7
Dependent Claim
20 words
A process according to claim 5 wherein said catalytically active siliceous matrix is a synthetic, semisynthetic or natural clay-type silica-alumina.
Claim 8
Dependent Claim
14 words
A process according to claim 5 wherein said catalytically active siliceous matrix is silica-mangensia.
Claim 9
Dependent Claim
75 words
An improved catalytic cracking catalyst comprising a zeolitic crystalline aluminosilicate in a siliceous matrix, said catalyst characterized by enhanced activity, selectivity and attrition resistance, the improvement of which comprises heat treating said catalyst at a temperature above about 1300*F. and below the thermal destructive temperature of said zeolitic crystalline aluminosilicate contained therein in the absence of steam, said improvement being performed on a catalyst previously rendered catalytically active by a process comprising drying and calcining.
Claim 10
Dependent Claim
75 words
An improved catalytic cracking catalyst comprising a zeolitic crystalline aluminosilicate in a siliceous matrix, said catalyst characterized by enhanced activity, selectivity and attrition resistance, the improvement of which comprises heat treating said catalyst at a temperature above about 1300*F. and below the thermal destructive temperature of said zeolitic crystalline aluminosilicate contained therein in the absence of steam, said improvement being performed on a catalyst previously rendered catalytically active by a process comprising drying and calcining.
Claim 11
Dependent Claim
21 words
A catalyst according to claim 8 wherein said treating is conducted at a temperature of from about 1400* to about 1550*F.
Claim 12
Dependent Claim
25 words
A catalyst according to claim 8 wherein the zeolitic crystalline aluminosilicate is selected from the group consisting of faujasite, zeolite X, zeolite Y and mordenite.
Claim 13
Dependent Claim
30 words
A catalyst according to claim 10 wherein said zeolitic crystalline aluminosilicate contains cations selected from the group consisting of hydrogen, barium, calcium, magnesium, manganese, rare earths metals and combinations thereof.
Claim 14
Dependent Claim
34 words
A catalyst according to claim 8 wherein said catalyst comprises from about 1 to 25 weight percent zeolitic crystalline aluminosilicate and from about 99 to 75 weight percent of a catalytically active siliceous matrix.
Claim 15
Dependent Claim
20 words
A catalyst according to claim 12 wherein said catalytically active siliceous matrix is a synthetic semi-synthetic or natural clay-type silica-alumina.
Claim 16
Dependent Claim
14 words
A catalyst according to claim 12 wherein said catalytically active siliceous matrix is silica-magnesia.
Claim 17
Dependent Claim
59 words
A process of preparing a catalytic cracking catalyst which comprises: a. calcining a material comprising zeolitic crystalline aluminosilicate in a siliceous matrix at a temperature below 1300*F. rendering said material catalytically active, and b. heating said material in the absence of steam at a temperature above about 1300*F. and below the thermal destructive temperature of said zeolitic crystalline aluminosilicate.
Claim 18
Dependent Claim
59 words
A process of preparing a catalytic cracking catalyst which comprises: a. calcining a material comprising zeolitic crystalline aluminosilicate in a siliceous matrix at a temperature below 1300*F. rendering said material catalytically active, and b. heating said material in the absence of steam at a temperature above about 1300*F. and below the thermal destructive temperature of said zeolitic crystalline aluminosilicate.
Claim 19
Dependent Claim
18 words
A process according to claim 15 wherein the temperatUre in step (b) is about 1400* to about 1550*F.
Claim 20
Dependent Claim
25 words
A process according to claim 15 wherein the zeolitic crystalline aluminosilicate is selected from the group consisting of faujasite, zeolite X, zeolite Y and mordenite.
Claim 21
Dependent Claim
11 words
A catalytic cracking catalyst prepared by the method of claim 15.
Claim 22
Dependent Claim
11 words
A catalytic cracking catalyst prepared by the method of claim 16.
Claim 23
Dependent Claim
11 words
A catalytic cracking catalyst prepared by the method of claim 17.
Claim 24
Dependent Claim
76 words
A PROCESS OF PREPARING A CATALYTIC CRACKING CATALYST WHICH COMPRISES: A. CALCINING A MATERIAL COMPRISING ZEOLITIC CRYSTALLINE ALUMINOSILICATE IN A SILICEOUS MATRIX AT A TEMPERATURE BELOW ABOUT 1300*F. RENDERING SAID MATERIAL CATALYTICALLY ACTIVE, B. HEATING SAID MATERIAL IN THE PRESENCE OF STREAM AT A TEMPERATURE OF 1000* TO 1400*F., AND C. HEATING SAID MATERIAL IN THE ABSENCE OF STREAM AT A TEMPERATURE ABOVE ABOUT 1300*F. AND BELOW THE THERMAL DESTRUCTION TEMPERATURE OF SAID ZEOLITIC CRYSTALLINE ALUMINOSILICATE.
Claim 25
Dependent Claim
76 words
A PROCESS OF PREPARING A CATALYTIC CRACKING CATALYST WHICH COMPRISES: A. CALCINING A MATERIAL COMPRISING ZEOLITIC CRYSTALLINE ALUMINOSILICATE IN A SILICEOUS MATRIX AT A TEMPERATURE BELOW ABOUT 1300*F. RENDERING SAID MATERIAL CATALYTICALLY ACTIVE, B. HEATING SAID MATERIAL IN THE PRESENCE OF STREAM AT A TEMPERATURE OF 1000* TO 1400*F., AND C. HEATING SAID MATERIAL IN THE ABSENCE OF STREAM AT A TEMPERATURE ABOVE ABOUT 1300*F. AND BELOW THE THERMAL DESTRUCTION TEMPERATURE OF SAID ZEOLITIC CRYSTALLINE ALUMINOSILICATE.
Claim 26
Dependent Claim
18 words
A process according to claim 21 wherein the temperature of step (c) is about 1400* to about 1550*F.
Claim 27
Dependent Claim
25 words
A process according to claim 21 wherein the zeolitic crystalline aluminosilicate is selected from the group consisting of faujasite, zeolite X, zeolite Y and mordenite.
Claim 28
Dependent Claim
11 words
A catalytic cracking catalyst prepared by the method of claim 21.
Claim 29
Dependent Claim
11 words
A catalytic cracking catalyst prepared by the method of claim 22.
Claim 30
Dependent Claim
11 words
A catalytic cracking catalyst prepared by the method of claim 23.
References Cited (Backward Citations)
US3449070A
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US3329628A
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US3247098A
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US3325397A
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US3518051A
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US3553104A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |