Enhanced anti-solvent sedimentation of solids from liquids using pressurized carbon dioxide gas
AssigneeElectric Power Research Institute, Inc.
InventorsKumbakonam R. Vaidyanathan, Joseph D. Henry, Jr., Francis H. Verhoff
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Abstract
A method for increasing the sedimentation of mineral particles in feed liquids containing the same, particularly coal-derived liquids, by the use of an anti-solvent gas pressure technique. The mixture is held under a pressurized carbon dioxide atmosphere which causes an increase in the initial settling rate for sedimentation of the mineral particles from such liquids so that they may be used as fuels.
Claims7
A method for increasing the sedimentation of asphaltic material and solid mineral matter from coal-derived liquid containing the same, comprising the steps of:
- (a) mixing said coal-derived liquid with an anti-solvent capable of promoting precipitation of asphaltic material and enhancing the initial settling rate of said solid mineral matter, said anti-solvent selected from the group consisting of saturated noncyclic hydrocarbons, cyclic hydrocarbons, aromatic hydrocarbons, and mixtures thereof, and
- (b) holding said mixture under a pressurized atmosphere having carbon dioxide as its major component by volume to precipitate and settle said asphaltic material and said solid mineral matter from said coal-derived liquid.
Dependencies are inferred from the claim text.