Patent US4133741A successfully refreshed from Google Patents.
US4133741A
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Method for recovery of hydrocarbon fractions from hydrocarbon-bearing materials
Assignee: ExxonMobil Oil Corp
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Filing: 1974-11-05
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Granted: 1979-01-09
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Expires: 1994-11-05
Abstract
Abstract A plurality of hydrocarbon fractions are recovered from hydrocarbon-bearing material such as oil shale in a continuous retort wherein a bed of the material is moved through a heating chamber, the heating being for a time and at a temperature effective to strip increasingly heavier hydrocarbon fractions from the material as it moves through the heating chamber. The hydrocarbon fractions are collected by a plurality of collection means disposed along the path of movement of the bed for recovery of a corresponding plurality of hydrocarbon fractions.
Inventors
- 👤 Bernard E. Weichman
- 👤 John H. Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:08
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A method for recovering a plurality of gas and liquid phase hydrocarbon fractions from oil shale in a continuous traveling grate retort, comprising the steps of: forming a gas permeable bed of crushed oil shale particles on a traveling grate; moving the oil shale bed along a horizontal path through a retort zone; passing a flow of hot neutral or reducing gas downwardly through the bed in the retort zone to heat the oil shale particles to a temperature of from about 800° F. to about 1100° F. for a time effective to strip increasingly heavier hydrocarbons from the particles as the particles are moved through the retort zone; collecting the gas and liquid hydrocarbons below the bed in the retort zone in a plurality of collection means disposed along the path of the bed and having adjustable baffles; and adjusting the collection means baffles to collect a desired plurality of gas and liquid phase hydrocarbon fractions from the oil shale.
Claim 2
Independent Claim
161 words
A method for recovering a plurality of gas and liquid phase hydrocarbon fractions from oil shale in a continuous traveling grate retort, comprising the steps of: forming a gas permeable bed of crushed oil shale particles on a traveling grate; moving the oil shale bed along a horizontal path through a retort zone; passing a flow of hot neutral or reducing gas downwardly through the bed in the retort zone to heat the oil shale particles to a temperature of from about 800° F. to about 1100° F. for a time effective to strip increasingly heavier hydrocarbons from the particles as the particles are moved through the retort zone; collecting the gas and liquid hydrocarbons below the bed in the retort zone in a plurality of collection means disposed along the path of the bed and having adjustable baffles; and adjusting the collection means baffles to collect a desired plurality of gas and liquid phase hydrocarbon fractions from the oil shale.
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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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |