Patent US4087350A successfully refreshed from Google Patents.
US4087350A
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Olefins production by steam cracking over manganese catalyst
Assignee: BP PLC
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Filing: 1976-09-02
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Granted: 1978-05-02
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Expires: 1996-09-02
Abstract
Abstract This invention relates to a process for producing olefins by cracking atmospheric/vacuum residue boiling above 500° C in the presence of steam over a fluidized manganese catalyst.
Inventors
- 👤 Alexander John Kolombos
- 👤 Donald McNeice
- 👤 Dennis Charles Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:35
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/34; C; C10; C10G; C10G2400/00; C10G2400/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
57 words
A process of producing olefins by cracking at elevated temperature in the presence of steam a hydrocarbon feedstock consisting essentially of atmospheric residue and/or vacuum residue boiling above 500° C over a catalyst consisting essentially of manganese oxide supported on a refractory oxide selected from the group consisting of zirconia and titania in a fluidized bed reactor.
Claim 2
Dependent Claim
57 words
A process of producing olefins by cracking at elevated temperature in the presence of steam a hydrocarbon feedstock consisting essentially of atmospheric residue and/or vacuum residue boiling above 500° C over a catalyst consisting essentially of manganese oxide supported on a refractory oxide selected from the group consisting of zirconia and titania in a fluidized bed reactor.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the manganese oxide is manganese dioxide.
Claim 4
Dependent Claim
19 words
A process according to claim 1 wherein the supported catalyst contains between 1 and 20% by weight of manganese.
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein the catalyst bed is maintained in a fluidised state by means of the pressure of reactant steam.
Claim 6
Dependent Claim
29 words
A process according to claim 1 wherein the cracking is carried out by bringing the steam and hydrocarbon feedstock into contact with the catalyst bed in counter current fashion.
Claim 7
Dependent Claim
22 words
A process according to claim 5 wherein the hydrocarbon feedstock is brought into contact with the catalyst bed under force of gravity.
Claim 8
Dependent Claim
19 words
A process according to claim 1 wherein the temperature of the catalyst bed is between 600° and 800° C.
Claim 9
Dependent Claim
25 words
A process according to claim 1 wherein the temperature of the hydrocarbon feedstock at the point of entry into the reactor is below 400° C.
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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |