US3849295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst removal in moving bed processes
Assignee: Universal Oil Products Co
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Filing: 1972-08-23
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Granted: 1974-11-19
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Expires: 1992-08-23
Abstract
Abstract Removal of catalyst from moving bed reactor systems having poor catalyst flow due to liquid reactants or catalyst agglomeration problems is facilitated by washing the heavy hydrocarbon from the catalyst with a light, volatile hydrocarbon flush stream or a stripping gas passed over the catalyst while it is in a separation zone located within the reaction vessel or a lock hopper below the reactor. Emphasis is directed to the catalyst removal problems and safety hazards connected with heavy oil hydroprocessing operations.
Inventors
- 👤 G Addison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:59
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/10; C10G49/14; B; B01; B01J; B01J37/00; B01J37/12; B01J37/14; B01J8/00; B01J8/08; B01J8/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
IN A PROCESS IN WHICH A DOWNWARD MOVING-BED OF CATALYST IS UTILIZED IN A HYDROCARBON CONVERSION PROCES HAVING REACTANTS PRESENT IN A REACTION ZONE AS A LIQUID PHASE, THE METHOD OF REMOVING CATALYST FROM THE BOTTOM OF A REACTION VESSEL WHICH COMPRISES THE STEPS OF: A. PASSING A QUANTITY OF CATALYST AND ENTRAINED LIQUID PHASE REACTANTS FROM A REACTION ZONE AND INTO A SEPARATION ZONE THROUGH A FLUID FLOW CONTROLLING VALVE MEANS, B. FLUSHING LIQUID PHASE REACTANTS ENTRAINED WITH THE CATALYST FROM THE SEPARATION ZONE BY PASING A LIGHT LIQUID HYDROCARBON UPWARDLY OVER THE CATALYST IN THE SEPARATION ZONE AND THROUGH THE VALVE MEANS AND INTO THE REACTION VESSEL, C. REMOVING THE LIGHT LIQUID HYDROCARBON FROM THE REACTION VESSEL THROUGH THE SAME OUTLET MEANS USED TO REMOVE THE LIQUID PHASE REACTANTS, D. CLOSING THE VALVE MEANS, AND , E. DRYING THE CATALYST WITHIN THE SEPARATION ZONE BY PASSING A STREAM OF GAS OVER THE CATALYST.
Claim 2
Dependent Claim
155 words
IN A PROCESS IN WHICH A DOWNWARD MOVING-BED OF CATALYST IS UTILIZED IN A HYDROCARBON CONVERSION PROCES HAVING REACTANTS PRESENT IN A REACTION ZONE AS A LIQUID PHASE, THE METHOD OF REMOVING CATALYST FROM THE BOTTOM OF A REACTION VESSEL WHICH COMPRISES THE STEPS OF: A. PASSING A QUANTITY OF CATALYST AND ENTRAINED LIQUID PHASE REACTANTS FROM A REACTION ZONE AND INTO A SEPARATION ZONE THROUGH A FLUID FLOW CONTROLLING VALVE MEANS, B. FLUSHING LIQUID PHASE REACTANTS ENTRAINED WITH THE CATALYST FROM THE SEPARATION ZONE BY PASING A LIGHT LIQUID HYDROCARBON UPWARDLY OVER THE CATALYST IN THE SEPARATION ZONE AND THROUGH THE VALVE MEANS AND INTO THE REACTION VESSEL, C. REMOVING THE LIGHT LIQUID HYDROCARBON FROM THE REACTION VESSEL THROUGH THE SAME OUTLET MEANS USED TO REMOVE THE LIQUID PHASE REACTANTS, D. CLOSING THE VALVE MEANS, AND , E. DRYING THE CATALYST WITHIN THE SEPARATION ZONE BY PASSING A STREAM OF GAS OVER THE CATALYST.
Claim 3
Dependent Claim
131 words
In a process utilizing a downward moving-bed of catalyst to desulfurize a residual petroleum fraction which remains at least partially in a liquid state at reaction conditions, the method of transferring catalyst from the bottom of a reaction vessel which comprises the steps of: a. passing a quantity of the contents of the reaction vessel, comprising liquid state residual petroleum and catalyst, from the reaction vessel and through a fluid flow controlling valve means and into a separation zone; b. flushing liquid state residual petroleum from the separation zone by upwardly passing a light liquid hydrocarbon through the separation zone and valve means and into the reaction vessel; c. closing the valve means; and, d. drying the catalyst within the separation zone by passing a stream of gas over the catalyst.
Claim 4
Dependent Claim
131 words
In a process utilizing a downward moving-bed of catalyst to desulfurize a residual petroleum fraction which remains at least partially in a liquid state at reaction conditions, the method of transferring catalyst from the bottom of a reaction vessel which comprises the steps of: a. passing a quantity of the contents of the reaction vessel, comprising liquid state residual petroleum and catalyst, from the reaction vessel and through a fluid flow controlling valve means and into a separation zone; b. flushing liquid state residual petroleum from the separation zone by upwardly passing a light liquid hydrocarbon through the separation zone and valve means and into the reaction vessel; c. closing the valve means; and, d. drying the catalyst within the separation zone by passing a stream of gas over the catalyst.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |