Process for the solvent extraction of solid carbon-containing materials, principally coal

摘要

A solid carbonaceous material principally coal is subjected to a solvent extraction by [a] introducing a hydrogen donor-solvent and the carbonaceous particulate material into a generally vertically directed extraction zone at an elevated pressure; [b] imparting a continuous generally upwards directed flow to said solvent, the solvent being at a temperature above the softening temperature of the said particles and the pressure being higher than the vapor pressure of the solvent at said temperature, the flow velocity of the solvent being sufficient to cause fluidization of said particles; [c] withdrawing the solvent together with the formed extract continuously at the top of the extraction zone while preventing the entrainment of solid particles; [d] effecting the separation of the extract and solvent outside said extraction zone; [e] removing the remaining solid particles together with residual extract-free or extract-lean solvent from the extraction zone separate from the withdrawal at [c]; and [f] separating the solvent removed at [e] from the solid particles.