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| Number | Title | Issue Date |
| 5460699 | Variable injection process and apparatus for energy recovery A process and apparatus for recovering energy values of waste tar sludge comprises dewatering the waste tar sludge, transporting the dewatered tar sludge in enclosed containers vented through activated carbon to remove volatile hydrocarbons before vapors ... | 10/24/1995 |
| 5173921 | Apparatus and process for activation of carbon by electrical resistance heating in the presence of steam In an apparatus and process for the activation of carbon from carbon feedstocks by electrical resistance heating in the presence of steam, which comprises preheating particles of the carbon feedstock in a preheater, having the particles descend by gravity... | 12/22/1992 |
| 4557204 | Process and apparatus for treating waste materials Comminuted waste material is introduced in the form of briquettes, pellets or granulates into a gastight rotating drum for the recovery of useful gas by pyrolysis. The size of the briquettes, pellets or granulates is from about 1 to 50 mm and they are bro... | 12/10/1985 |
| 4501644 | Apparatus for the selective retorting of carbonaceous materials A staged retort is provided for the retorting of certain types of carbonaceous materials such as oil shale, coal or lignite, wherein the staged retort includes a number of separate retort chambers arranged in a modular configuration, with one retort chamb... | 02/26/1985 |
| 4478686 | Process and apparatus for recovery of solvents A process for the recovery of solvents is disclosed. A hot carrier gas stream laden with solvent vapors from an evaporation space is compressed, cooled, and expanded with production of work for condensing and separating the solvent. The carrier gas stream... | 10/23/1984 |
| 4464247 | Horizontal fluid bed retorting process A horizontal fluid bed retorting process is provided for preheating, retorting, combusting, and recovering heat from oil shale and other solid hydrocarbon-containing material. In the process, the combustor and heat recovery chambers share a common heat-co... | 08/07/1984 |
| 4344821 | Apparatus for continuously carbonizing and activating carbonaceous materials A process for carbonizing and then activating carbonaceous materials in a continuous process as performed by an apparatus consisting of an elongated, slightly inclined rotary retort into the higher end of which the material is deposited and from the lower... | 08/17/1982 |
| 4287024 | High-speed smokeless coke oven battery A plurality of sole flue-heated, non-recovery coke ovens constructed in side-by-side relation in a battery have their chimney uptake outlets connected to a common combustion tunnel extending longitudinally of and above the battery and connected to stacks ... | 09/01/1981 |
| 4285773 | Apparatus and process for recovery of hydrocarbon from inorganic host materials In the apparatus, concentric, radially spaced tubes are secured to each other and rotated about a common horizontal long axis. Selectively placed and configured lift elements repeatedly lift and drop feed material in the two tubes. Advance elements cause ... | 08/25/1981 |
| 4276120 | Purification of coke A process and apparatus are disclosed for purification of petroleum coke to produce an economical low sulfur product suitable for electrode production. Finely ground green coke is treated on an enclosed circular grate apparatus and subjected to sequential... | 06/30/1981 |
| 4105419 | Fluidized bed apparatus A fluidized bed apparatus suitable for the combustion of fuel has a baffle assembly arranged in the freeboard above the fluidized bed level. The assembly is in the form of a perforate duct which defines within it a passage connecting with the gas exit of ... | 08/08/1978 |
