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US 4,539,098 AGranted
Upgrading carbonaceous materials
AssigneePhillips Petroleum Company
InventorAmos Yudovich
Life of this patent
Estimating the term…
Abstract
Recycle shale oil is used in an extractive pyrolysis process of oil shale. Hot gases from the pyrolyzer are used to preheat the shale.
Claims6
A process comprising
- (a) mixing a hot liquid oil with oil shale particles to form a slurry;
- wherein the slurry is formed by mixing each 1 part by weight of oil shale which has been preheated by contact with hot gases to a temperature in the range of 200.degree.-1000.degree. F. within the range of from about 0.2 to about 20 parts by weight of the hot oil;
- (b) maintaining the slurry at a temperature in the range of 650.degree.-1250.degree. F. in an extraction zone for a period of time sufficient to decompose a portion of the oil shale into lighter products;
- (c) withdrawing a stream of hot gases from the extraction zone;
- (d) passing said stream of hot gases into contact with the oil shale particles to be used in forming the slurry;
- (e) separating the at least a portion of the oil shale from the at least a portion of the hot liquid oil;
- (f) fractionating the hot liquid oil in a fractionation zone;
- and
- (g) cooling the oil shale in a cooling zone.
6 more elements
Dependencies are inferred from the claim text.