US5248484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attrition reactor system
Assignee: Lockheed Martin Energy Systems Inc
•
Filing: 1992-09-15
•
Granted: 1993-09-28
•
Expires: 2012-09-15
Abstract
Abstract A reactor vessel for reacting a solid particulate with a liquid reactant has a centrifugal pump in circulatory flow communication with the reactor vessel for providing particulate attrition, resulting in additional fresh surface where the reaction can occur.
Inventors
- 👤 Charles D. Scott
- 👤 Brian H. Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:15
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1868; B01J19/1881; B01F; B01F33/00; B01F33/80; B01F33/83; B01F33/831
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
An attrition reactor system comprising a reactor vessel containing a solid particulate cellulosic substrate and an aqueous hydrolyzing reactant; and an attriting means, said attriting means comprising a centrifugal pump consisting essentially of a housing having an internal cavity and a rotor having vanes disposed in said cavity, said centrifugal pump being in circulatory flow communication with said reactor vessel, said centrifugal pump being operable at a speed sufficient to attrit said solid particulate cellulosic substrate sufficiently to react with said aqueous hydrolyzing reactant.
Claim 2
Dependent Claim
84 words
An attrition reactor system comprising a reactor vessel containing a solid particulate cellulosic substrate and an aqueous hydrolyzing reactant; and an attriting means, said attriting means comprising a centrifugal pump consisting essentially of a housing having an internal cavity and a rotor having vanes disposed in said cavity, said centrifugal pump being in circulatory flow communication with said reactor vessel, said centrifugal pump being operable at a speed sufficient to attrit said solid particulate cellulosic substrate sufficiently to react with said aqueous hydrolyzing reactant.
Claim 3
Dependent Claim
38 words
The attrition reactor system according to claim 1 wherein said centrifugal pump is located externally to said reactor vessel, and wherein said centrifugal pump further comprises attritor feed and attritor return lines to provide said circulatory flow communication.
Claim 4
Independent Claim
114 words
A method for hydrolyzing a solid particulate cellulosic substrate comprising the steps of: providing a reactor vessel; introducing said solid particulate cellulosic substrate and an aqueous hydrolyzing reactant into said reactor vessel to form a slurry; and attriting said solid particulate cellulosic substrate using an attriting means, said attriting means comprising a centrifugal pump consisting essentially of a housing having an internal cavity and a rotor having vanes disposed in said cavity, said centrifugal pump being in circulatory flow communication with said reactor vessel, said attriting means circulating said slurry through said centrifugal pump and attriting said solid particulate cellulosic substrate sufficiently to react said solid particulate cellulosic substrate with said aqueous hydrolyzing reactant.
Claim 5
Independent Claim
114 words
A method for hydrolyzing a solid particulate cellulosic substrate comprising the steps of: providing a reactor vessel; introducing said solid particulate cellulosic substrate and an aqueous hydrolyzing reactant into said reactor vessel to form a slurry; and attriting said solid particulate cellulosic substrate using an attriting means, said attriting means comprising a centrifugal pump consisting essentially of a housing having an internal cavity and a rotor having vanes disposed in said cavity, said centrifugal pump being in circulatory flow communication with said reactor vessel, said attriting means circulating said slurry through said centrifugal pump and attriting said solid particulate cellulosic substrate sufficiently to react said solid particulate cellulosic substrate with said aqueous hydrolyzing reactant.
Claim 6
Dependent Claim
36 words
The method according to claim 3 wherein said centrifugal pump is located externally to said reactor vessel, and wherein said centrifugal pump further comprises attritor feed and attritor return lines to provide said circulatory flow communication.
Claim 7
Independent Claim
131 words
A method for hydrolyzing waste paper comprising the steps of: providing a reactor vessel; introducing into said reactor vessel an aqueous slurry containing shredded waste paper having a surface and a cellulase enzyme for hydrolyzing said shredded waste paper; operating said reactor vessel so that a hydrolyzing reaction occurs on said surface of said shredded waste paper; and attriting said shredded waste paper using an attriting means, said attriting means comprising a centrifugal pump consisting essentially of a housing having an internal cavity and a rotor having vanes disposed in said cavity, said centrifugal pump being in circulatory flow communication with said reactor vessel, said attriting means circulating said slurry through said centrifugal pump and attriting said shredded waste paper sufficiently to react said shredded waste paper with said cellulase enzyme.
Claim 8
Independent Claim
131 words
A method for hydrolyzing waste paper comprising the steps of: providing a reactor vessel; introducing into said reactor vessel an aqueous slurry containing shredded waste paper having a surface and a cellulase enzyme for hydrolyzing said shredded waste paper; operating said reactor vessel so that a hydrolyzing reaction occurs on said surface of said shredded waste paper; and attriting said shredded waste paper using an attriting means, said attriting means comprising a centrifugal pump consisting essentially of a housing having an internal cavity and a rotor having vanes disposed in said cavity, said centrifugal pump being in circulatory flow communication with said reactor vessel, said attriting means circulating said slurry through said centrifugal pump and attriting said shredded waste paper sufficiently to react said shredded waste paper with said cellulase enzyme.
References Cited (Backward Citations)
US3043526A
Cited
US3085756A
Cited
US3308037A
Cited
US3337414A
Cited
US3318248A
Cited
US3679431A
Cited
US3989848A
Cited
US4254150A
Cited
US4326036A
Cited
US4334026A
Cited
US4427453A
Cited
US4302543A
Cited
US4338399A
Cited
US4416989A
Cited
US4321328A
Cited
US4400218A
Cited
US4370172A
Cited
US4409329A
Cited
US4529699A
Cited
US4414330A
Cited
US4384897A
Cited
US4578353A
Cited
US4642287A
Cited
US4952503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-27 | 1997-03-29 | 1997-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-27 | 2001-03-29 | 2001-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-27 | 2005-03-29 | 2005-09-28 | $7700.00 | Window Closed / Lapsed |