Fractional distillation of hydrocarbons from coal
OwnerErnest P. Esztergarinventor
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Abstract
Process and apparatus for recovering volatile distillates from coal, and other solid carbonaceous fuel sources, by heating the top surface of a bilayer of coal formed of an upper layer of recycled coal and a lower layer of green coal, maintaining the lower level of green coal at a temperature cool enough to condense constituents distilled from the upper layer of recycle coal, and recycling the once passed green coal as recycle coal is disclosed.
Claims16
The process for recovering liquid fuel from coal comprising continuously forming a bilayer coal bed on a foraminous conveyor, passing the coal bed through a substantially oxygen free processing zone, heating the bed in said zone to a temperature of higher than about 550.degree. F., while maintaining the bottom of the bed at a temperature of not higher than about 450.degree. F., removing the top of the coal bed bilayer from the processing zone as product char, recycling the bottom of the coal bed bilayer to the processing zone to form the top of a coal bed bilayer in another pass through the processing zone, and removing liquid through the foraminous conveyor as product liquid fuel.
Dependencies are inferred from the claim text.