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GB1494300A
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Char composition and a method for making a char composition
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RO70983A
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Procedure for preventing the bitumino system
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US3925190A
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Preheating oil shale prior to pyrolysis thereof
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CA994524A
|
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Alumina recovery from retorted oil shale residue
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US3840637A
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Process for recovering vanadium values
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US3826809A
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Leaching of metal values from various ores
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US3859413A
|
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Alumina recovery from oil shale residue
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AU4312072A
|
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Vanadium recovery process
|
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US3709974A
|
|
Vanadium recovery process
|
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US3691056A
|
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Process for retorting oil shale in the absence of shale ash
|
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US3721730A
|
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Alumina recovery from retorted oil shale residue
|
|
US3656936A
|
|
Vanadium recovery process
|
|
AU1155970A
|
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Process
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US3595540A
|
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Ball heater-equilibrator system
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US3616266A
|
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Horizontal retort with solid heat transfer medium
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US3573197A
|
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Process for retorting oil shale
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US3597347A
|
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Process for retorting carbonaceous material
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US3550904A
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Flapper valve assembly
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US3496094A
|
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Apparatus and method for retorting solids
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US3510255A
|
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Recovery of sodium aluminate from dawsonite
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