Abstract: Substantially dry coal fines are fed into a pressurized zone by slurrying coal fines with a liquid, water-miscible, volatile organic solvent to form a pumpable slurry, pressurizing the slurry, removing and recycling the organic solvent component of the liquid phase of the slurry, thermally drying the pressurized fines and transporting the dried, pressurized fines into the pressurized zone.

Abstract: A process for the removal of SO.sub.X from a gaseous stream is disclosed in which the gaseous stream is contacted (a) with a particulate mixture of a reactive calcium-containing material and activated carbon, or (b) particulate activated carbon, the particulate activated carbon subsequently being mixed with a reactive calcium-containing material.

Abstract: An oxygen-containing gas distribution apparatus is dicslosed which can be employed in the fluidized bed regeneraton of carbon-contaminated catalysts, such as cracking catalysts.Said apparatus comprises a plurality of gas discharge nozzles affixed to at least one manifold member substantially horizontally disposed at the lower end of the regeneration chamber, said nozzles being restricted in internal cross-sectional area in their upstream portion connected to the manifold member and expanded in the internal cross-sectional area of their downstream portion such that a) the numerical ratio of the difference between the diameter of the downstream portion and the diameter of the upstream portion divided by the length of the downstream portion taken in the direction of gas flow does not exceed 0.18 and b) the ratio of the diameter of the upstream portion to its length taken in direction of gas flow does not exceed 1.67.

Abstract: The pyrolysis of hydrocarbons to produce light olefins is accomplished in a reactor-quench system employing a common molten metal medium and forced circulation risers in both the reactor and quench zones.

Abstract: In fluidized bed regeneration of carbon-contaminated catalysts, such as cracking catalysts, wherein at least a portion of the oxygen-containing gas required for fluidization and burn-off of carbon deposits is introduced as a separate stream into the dense phase of the fluidized catalyst, contained in the regeneration chamber, by means of a plurality of gas discharge nozzles, affixed to at least one manifold member substantially horizontally disposed at the lower end of the regeneration chamber, catalyst attrition is reduced and backflow of catalyst particles into the nozzles is minimized by utilizing gas discharges which are restricted in internal cross-sectional area in their upstream portion connected to the manifold member and expanded in the internal cross-sectional area of their downstream portion such that (a) the numerical ratio of the difference between diameter of the downstream portion and the diameter of the upstream portion divided by the length of the downstream portion taken in the direction of