Abstract: A process for recovery of C2 and C3 components in an on-purpose propylene production system includes utilizing a packed rectifier with a countercurrent stream to strip C2 and C3 components from a combined de-ethanizer overhead lights vapor and cracked gas vapor stream.

Abstract: The disclosure provides a process for recovery of C2 and C3 components in an on-purpose propylene production system utilizing a packed rectifier with a countercurrent stream to strip C2 and C3 components from a combined de-ethanizer overhead lights vapor and cracked gas vapor stream.

Abstract: An apparatus and method for removing particulate and gaseous pollutants from flue gas. The flue gas enters a presaturation section and is treated with a coarse spray of solution recovered from the system. The saturated gas enters a primary contacting section and is contacted by an ultrafine mist of fresh solution containing a gaseous pollutant absorption agent. The fine mist has an average droplet size of approximately 20 microns. The gas moves to a secondary contacting section where it is contacted by a coarse spray of recirculated solution. If necessary, the gas is demisted. Finally, the gas is discharged into the environment. Usable spent solution is regenerated and reused. Unusable water byproducts containing contaminants are discharged.

Abstract: A method for reducing the undesirable contaminants in process water produced in pyrolysis of low rank coal. The method uses the process water to quench and rehydrate a char produced by pyrolysis with the contaminants in the waster water being absorbed by the char.

Abstract: The spontaneous ignition of low rank coal is inhibited by spraying coal with an aqueous solution of an oxidizing agent which contains combined oxygen, drying oxidizing agent-sprayed coal and cooling the dried coal.

Abstract: A method for upgrading coal in-situ is disclosed in which a treatment zone is established around an energy source placed in a cavity within a coal seam and the pore structure of the coal substantially irreversibly collapses as moisture is driven off. The energy source provides either evaporative energy such as heat or a combination of heat and pressure in-situ. Resorption of water returning to the treatment zone during cooling of the coal prior to mining is limited due to the pore collapse.

Abstract: Wet coal is processed in a dryer, producing dry, hot coal. More wet coal is blended with the dry, hot coal and the mixture is processed in a cooler, resulting in a cool, blended dry coal.

Abstract: An elongated slot dryer is disclosed for drying wet solid particulate material. The slot dryer is constructed in the form of a trench with at least one aperture outlet at the bottom of the trench formed by two non-connecting walls. The wet particulate material (coal) enters through the top and exits through the bottom aperture while countercurrently contacting a drying fluid emitted through perforations situated in a drying fluid access means or conduit located substantially throughout the entire length of the slot dryer. The perforations in the fluid access means or conduit are limited to the bottom one half of the fluid access means relative to the aperture outlet to ensure that drying fluid is passed at first in a downward direction and then gently turns upward to countercurrent contact with the wet descending particles. An underlying conveyor will act to continuously remove the relatively dried particulate material passing through the aperture outlet.

Abstract: Coal dusting is controlled by spraying the coal with a relatively viscous aqueous solution of sugar or sugar and other components of sugar-forming plants.