US4008181A
Expired / Lapsed
US
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Steam dealkylation catalyst and process for preparing it
Assignee: Texaco Inc
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Filing: 1975-09-04
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Granted: 1977-02-15
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Expires: 1995-09-04
Abstract
Abstract Alkylaromatic hydrocarbons are dealkylated with steam in the presence of catalyst (typically containing oxides of nickel, potassium, chromium, and aluminum) which has been hydrogen-treated at high temperature.
Inventors
- 👤 Tansukhlal G. Dorawala
- 👤 Russell R. Reinhard
- 👤 John H. Estes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; B01J37/00; B01J37/16; C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/20; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/755; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/86; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
69 words
The process for preparing a catalyst characterized by its ability to catalyze hydrocarbon conversion reactions which comprises treating a calcined supported catalyst bearing oxides of (i) a Group VIII metal, (ii) a Group VI B metal of chromium, molybdenum or tungsten, and (iii) a Group I A metal in the presence of hydrogen for 4-16 hours at 950°-1400° F thereby forming a treated catalyst; and recovering said treated catalyst.
Claim 2
Dependent Claim
69 words
The process for preparing a catalyst characterized by its ability to catalyze hydrocarbon conversion reactions which comprises treating a calcined supported catalyst bearing oxides of (i) a Group VIII metal, (ii) a Group VI B metal of chromium, molybdenum or tungsten, and (iii) a Group I A metal in the presence of hydrogen for 4-16 hours at 950°-1400° F thereby forming a treated catalyst; and recovering said treated catalyst.
Claim 3
Dependent Claim
20 words
The process for preparing a catalyst as claimed in claim 1 wherein said Group VIII metal is nickel or cobalt.
Claim 4
Dependent Claim
18 words
The process for preparing a catalyst as claimed in claim 1 wherein said Group VIII metal is nickel.
Claim 5
Dependent Claim
19 words
The process for preparing a catalyst as claimed in claim 1 wherein said Group VI B metal is chromium.
Claim 6
Dependent Claim
19 words
The process for preparing a catalyst as claimed in claim 1 wherein said Group I A metal is potassium.
Claim 7
Dependent Claim
24 words
The process for preparing a catalyst as claimed in claim 1 wherein said calcined supported catalyst contains nickel, chromium, and potassium on a support.
Claim 8
Dependent Claim
87 words
The process for preparing a catalyst as claimed in claim 1 wherein said calcined supported catalyst is a (VIII)2/nO : b (VI)2/m O :c (I).sub.2 O :d (Supp) wherein (VIII) represents a metal of Group VIII of the periodic table of valence n, (VI) represents a metal of Group VI B of the periodic table of valence m, I represents a metal of Group I A of the periodic table, a is 0.002-0.75, b is 0.0001-0.78, c is 0.00003-0.17, d is 0.15-2.49, and (Supp) represents the support.
Claim 9
Dependent Claim
43 words
The process for preparing a catalyst as claimed in claim 1 wherein said catalyst is a NiO: b Cr.sub.2/3 O c K.sub.2 O: d (Supp) wherein a is 0.08-0.54, b is 0.0002-0.78, c is 0.01-0.05 d is 0.15-2.49, and (Supp) represents the support.
Claim 10
Dependent Claim
19 words
The process for preparing a catalyst as claimed in claim 1 wherein said catalyst is (0.08-0.27)NiO:(0.21-0.75)Cr.sub.2/3 O:(0.01-0.04)K.sub.2 O:(0.38-0.81)Al.sub.2 O.sub.3
Claim 11
Dependent Claim
22 words
The process for preparing a catalyst as claimed in claim 1 wherein said catalyst is 0.2 NiO:0.29Cr.sub.2/3 O:0.02 K.sub.2 O:0.68 Al.sub.2 O.sub.3
Claim 12
Dependent Claim
58 words
A novel catalyst, characterized by its ability to catalyze hydrocarbon conversion reactions, which comprises a calcined supported catalyst bearing oxides of (i) a Group VIII metal, (ii) a Group VI B metal of chromium, molybdenum or tungsten, (iii) a Group I A metal which calcined supported catalyst has been treated at 950°-1400° F in the presence of hydrogen.
Claim 13
Dependent Claim
58 words
A novel catalyst, characterized by its ability to catalyze hydrocarbon conversion reactions, which comprises a calcined supported catalyst bearing oxides of (i) a Group VIII metal, (ii) a Group VI B metal of chromium, molybdenum or tungsten, (iii) a Group I A metal which calcined supported catalyst has been treated at 950°-1400° F in the presence of hydrogen.
Claim 14
Dependent Claim
74 words
A novel catalyst, characterized by its ability to catalyze hydrocarbon conversion reactions, as claimed in claim 11 wherein said catalyst is a (VIII).sub.2/n O:b(VI).sub.2/m O:c(I).sub.2 O:d (Supp) wherein (VIII) represents a metal of Group VIII of the periodic table of valence n, (VI) represents a metal of Group VI B of the periodic table of valence m, a, is 0.002-0.75, b is 0.0001-0.78, c is 0.00003-0.17, d is 0.15-2.49, and (Supp) represents the support.
Claim 15
Dependent Claim
48 words
A novel catalyst, characterized by its ability to catalyze hydrocarbon conversion reactions, as claimed in claim 11 wherein said catalyst is a NiO: b Cr.sub.2/3 O:c K.sub.2 O:d (Supp) wherein a is 0.08-0.54, b is is 0.0002-0.78, c is 0.01-0.05 d is 0.15-2.49, and (Supp) represents the support.
Claim 16
Dependent Claim
25 words
A novel catalyst, characterized by its ability to catalyze hydrocarbon conversion reactions, as claimed in claim 11 wherein said catalyst is (0.08-0.27)NiO:(0.21-0.75)Cr.sub.2/3 O:(0.01-0.04)K.sub.2 O:(0.38-0.83)Al.sub.2 O.sub.3
Claim 17
Dependent Claim
29 words
A novel catalyst, characterized by its ability to catalyst hydrocarbon conversion reactions, as claimed in claim 11 wherein said catalyst is 0.2 NiO:0.29 Cr.sub.2/3 O:0.02 K.sub.2 O:0.68 Al.sub.2 O.sub.3
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |