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US3887453A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for obtaining oil, gas and byproducts from pyrobituminous shale or other solid materials impregnated with hydrocarbons

Assignee: Petroleo Brasileiro SA Petrobras
•
Filing: 1972-09-01
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Granted: 1975-06-03
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Expires: 1992-09-01
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Abstract

Abstract An ''''Improved process for obtaining oil, gas and byproducts from pyrobituminous shale or other solid materials impregnated with hydrocarbons'''' under such conditions that a mist is permitted to form at the output of the reactor, resulting from the extraction of recycling gases passing in countercurrent with the downwardly moving shale. The improvement results in lower costs, higher amounts of extracted material, higher rentability and, accordingly, better economy.

Inventors

  • 👤 Seiki Ueta
  • 👤 Osmar Chaves Ivo

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 18:10
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 195 words
A NON-COMBUSTION PROCESS FOR OBTAINING MINERAL OIL AND OTHER DERIVATIVES FROM PYROBITUMINOUS SHALE OR OTHER SOLID MATERIALS IMPREGNATED WITH HYDROCARBONS, THE SAID PROCESS BEING NON-COMBUSTIVE AND CARRIED OUT IN A VERTICAL DISTILLATION RETORT, WHEREIN THE MINED SHALE OR OTHER SOLID MATERIALS IS CONTINOUSLY FED AT THE TOP OF SAID RETORT THROUGH AN INERT GAS SEALED VALVE, WHEREFROM SAID MINED SHALE OR OTHER SOLID MATERIALS ARE EVENLY DISTRIBUTED TO THE RETORTING ZONE AND THEN DESCENT TO A COOLING ZONE BELOW THE RETORTING ZONE, THE RETORTING BEING CARRIED OUT AT SUPER-ATMOSPHERIC PRESSURE BY A MIXTURE OF SUBSTANTIALLY OXYGEN-FREE RECYCLING GASES PREVIOUSLY AND INDIRECTLY HEATED OUTSIDE THE RETORT, SAID HEATED RECYCLING GASES BEING INTRODUCED INTO THE BOTTOM OF SAID RETORTING ZONE OF SAID RETORT AT A HIGHER TEMPERATURE THAN THE RETORTING TEMPERATURE, AND OF SUBSTANTIALLY OXYGEN-FREE RECYCLING GASES INTRODUCED COLD AT THE BOTTOM OF SAID RETORT INTO THE COOLING ZONE WHICH IN UPWARDLY FLOW THROUGH THE COOLING ZONE EXCHANGE SENSIBLE HEAT WITH SAID RETORT SHALE OR OTHER SOLID MATERIALS THAT IS CONTINUOUSLY WITHDRAWN FROM THE BOTTOM OF SAID RETORT THROUGH AN INERT GAS SEALED VALVE, THE LIQUID AND GASEOUS, RETORTING PRODUCTS BEING WITHDRAWN FROM TOP OF SAID RETORT.
Claim 2
Dependent Claim 195 words
A NON-COMBUSTION PROCESS FOR OBTAINING MINERAL OIL AND OTHER DERIVATIVES FROM PYROBITUMINOUS SHALE OR OTHER SOLID MATERIALS IMPREGNATED WITH HYDROCARBONS, THE SAID PROCESS BEING NON-COMBUSTIVE AND CARRIED OUT IN A VERTICAL DISTILLATION RETORT, WHEREIN THE MINED SHALE OR OTHER SOLID MATERIALS IS CONTINOUSLY FED AT THE TOP OF SAID RETORT THROUGH AN INERT GAS SEALED VALVE, WHEREFROM SAID MINED SHALE OR OTHER SOLID MATERIALS ARE EVENLY DISTRIBUTED TO THE RETORTING ZONE AND THEN DESCENT TO A COOLING ZONE BELOW THE RETORTING ZONE, THE RETORTING BEING CARRIED OUT AT SUPER-ATMOSPHERIC PRESSURE BY A MIXTURE OF SUBSTANTIALLY OXYGEN-FREE RECYCLING GASES PREVIOUSLY AND INDIRECTLY HEATED OUTSIDE THE RETORT, SAID HEATED RECYCLING GASES BEING INTRODUCED INTO THE BOTTOM OF SAID RETORTING ZONE OF SAID RETORT AT A HIGHER TEMPERATURE THAN THE RETORTING TEMPERATURE, AND OF SUBSTANTIALLY OXYGEN-FREE RECYCLING GASES INTRODUCED COLD AT THE BOTTOM OF SAID RETORT INTO THE COOLING ZONE WHICH IN UPWARDLY FLOW THROUGH THE COOLING ZONE EXCHANGE SENSIBLE HEAT WITH SAID RETORT SHALE OR OTHER SOLID MATERIALS THAT IS CONTINUOUSLY WITHDRAWN FROM THE BOTTOM OF SAID RETORT THROUGH AN INERT GAS SEALED VALVE, THE LIQUID AND GASEOUS, RETORTING PRODUCTS BEING WITHDRAWN FROM TOP OF SAID RETORT.
Claim 3
Dependent Claim 195 words
A non-combustion process for obtaining mineral oil and other derivatives from pyrobituminous shale or other solid materials impregnated with hydrocarbons, the said process being non-combustive and carried out in a vertical distillation retort, wherein the mined shale or other solid materials is continuously fed at the top of said retort through an inert gas sealed valve, wherefrom said mined shale or other solid materials are evenly distributed to the retorting zone and then descend to a cooling zone below the retorting zone, the retorting being carried out at super-atmospheric pressure by a mixture of substantially oxygen-free recycling gases previously and indirectly heated outside the retort, said heated recycling gases being introduced into the bottom of the retorting zone of said retort at a higher temperature than the retorting temperature, and of substantially oxygen-free recycling gases introduced cold at the bottom of said retort into the cooling zone which in upwardly flow through the cooling zone exchange sensible heat with said retorted shale or other solid materials that is continuously withdrawn from the bottom of said retort through an inert gas sealed valve, the liquid and gaseous retorting products being drawn from top of said retort.
Claim 4
Dependent Claim 195 words
A non-combustion process for obtaining mineral oil and other derivatives from pyrobituminous shale or other solid materials impregnated with hydrocarbons, the said process being non-combustive and carried out in a vertical distillation retort, wherein the mined shale or other solid materials is continuously fed at the top of said retort through an inert gas sealed valve, wherefrom said mined shale or other solid materials are evenly distributed to the retorting zone and then descend to a cooling zone below the retorting zone, the retorting being carried out at super-atmospheric pressure by a mixture of substantially oxygen-free recycling gases previously and indirectly heated outside the retort, said heated recycling gases being introduced into the bottom of the retorting zone of said retort at a higher temperature than the retorting temperature, and of substantially oxygen-free recycling gases introduced cold at the bottom of said retort into the cooling zone which in upwardly flow through the cooling zone exchange sensible heat with said retorted shale or other solid materials that is continuously withdrawn from the bottom of said retort through an inert gas sealed valve, the liquid and gaseous retorting products being drawn from top of said retort.
Claim 5
Dependent Claim 56 words
The process according to claim 1 wherein the gases produced in the retorting process are separated from liquid components and from solid material in suspension by means of a system of cyclones and electrostatic precipitators in series, and then part of said gases is heated prior to its injection into the bottom of said retorting zone.
Claim 6
Dependent Claim 29 words
The process according to claim 1 wherein said heated part of substantially oxygen-free recycling gases is indirectly heated in a furnace outside the retort to a temperature between 900*-1300*F.
Claim 7
Dependent Claim 37 words
The process according to claim 1 wherein said part of substantially oxygen-free recycling gases without previous heating or cooling is introduced into the bottom of said retort at a temperature of about 212*F as so-called cold gases.
Claim 8
Dependent Claim 17 words
The process according to claim 1 wherein the optimum temperature of retorting is between 800* - 1,000*F.
Claim 9
Dependent Claim 23 words
The process according to claim 1 wherein the retorting is accomplished in the retort at an internal pressure between 7.1 and 21.3 psig.
Claim 10
Dependent Claim 30 words
The process according to claim 1 wherein the size of the pieces of said mined shale fed to said retort is between 5.3 and 200 millimeters (0.25 and 8.00 inches).

References Cited (Backward Citations)

US3228869A Cited
US3384569A Cited
US3526586A Cited
US3503869A Cited
US3484364A Cited
US3551322A Cited
US3619405A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-06-02 1978-12-02 1979-06-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-06-02 1982-12-02 1983-06-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-06-02 1986-12-02 1987-06-03 $7700.00 Window Closed / Lapsed

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