Abstract: A apparatus and method for augmenting the thrust of a jet engine while reducing the noise generated thereby, including extending the thrust reverser sleeve, exposing the cascades while retaining the thrust reverser doors or buckets in their stowed position.

Abstract: A means for augmenting the thrust of a jet engine while reducing the noise generated thereby, including extending the thrust reverser sleeve or sleeve halves, thereby exposing the cascades to admit ambient air while retaining the thrust reverser blocker doors or buckets in their stowed position, or providing apertures to admit ambient air; to accelerate, mix and add mass and reduce the exit velocity of the exhaust gas flow, while retaining all the basic elements of the jet engine and its existing thrust reversing systems.

Abstract: A modification of a 727 airplane, including a change in wing profile, to affect flight characteristics and the engines to lessen noise, such that the takeoff and landing procedure is modified so that engine power may be reduced, permitting the modified aircraft to meet the latest noise requirements without substantially reducing pay load.

Abstract: In a solvent recovery plant including a recovery or distillation tower from which solvent product is recovered overhead, an isothermal separator, preferably a cyclone, is used to separate liquid phase contaminant (i.e. oil in a lubricating oil extraction process) in overhead product and to feed the separated liquid to the recovery tower as reflux. In addition, a portion of the feed to the tower can be branched off and mixed with the overhead product to bring its temperature down to close to the dew point of the solvent vapor. In this way, flooding of the uppermost tower trays and distillation of oil overhead can be overcome.

Abstract: Alkali metal sulfides are regenerated from alkali metal hydrosulfides which are produced as a result of the hydroconversion of heavy carbonaceous feeds. The regeneration is effected by treating the spent solids from a hydroconversion reactor, said solids containing an alkali metal hydrosulfide, with water and carbon dioxide at a temperature and pressure sufficient to convert about 50% of the alkali metal hydrosulfide to an alkali metal carbonate, and heating a mixture of said alkali metal carbonate and unreacted alkali metal hydrosulfide with a quantity of coke to an elevated temperature sufficient to cause reaction of the hydrosulfide with the carbonate whereby an alkali metal sulfide is formed.

Abstract: Alkali metal sulfides are regenerated from alkali metal hydrosulfides which are produced as a result of the hydroconversion of heavy carbonaceous feeds. The regeneration is effected by contacting the alkali metal hydrosulfide with a metal oxide at elevated temperatures.

Abstract: An asphalt-containing mineral oil is deasphalted by contacting the oil with a liquid hydrogen sulfide deasphalting solvent for a time sufficient to remove a substantial portion of the asphalt from the oil. Utilization of liquid hydrogen sulfide as the deasphalting solvent is capable of giving high yields of deasphalted oil. In contrast to the use of aliphatic solvents for deasphalting, the hydrogen sulfide readily mixes with the heavy feed even at relatively low temperatures.