Abstract: Olefin monomer is recovered from a liquid polymerization reaction mixture comprising olefin monomer, catalyst residue, and catalyst deactivation compounds by washing the mixture with water and then separating the organic phase and aqueous phase. The liquid mixture can also comprise soluble olefin polymer.

Abstract: Two reactors containing an absorbing composition are utilized to remove hydrogen sulfide (H.sub.2 S) from a fuel being utilized as fuel for an internal combustion engine. The reactors are heated to reaction temperature with the engine exhaust gas and the engine exhaust gas is also utilized to regenerate the absorbing composition. Continuous removal of hydrogen sulfide is achieved by utilizing the absoring composition in one reactor to remove H.sub.2 S while the absorbing composition in the second reactor is regenerated. When the absorbing composition in the first reactor becomes sulfided to the extent desired, the absorbing composition in the second reactor is then utilized to remove H.sub.2 S while the absorbing composition in the first reactor is regenerated.

Abstract: Two reactors containing an absorbing composition are utilized to remove hydrogen sulfide (H.sub.2 S) from a fuel being utilized as fuel for an internal combustion engine. The reactors are heated to reaction temperature with the engine exhaust gas and the engine exhaust gas is also utilized to regenerate the absorbing composition. Continuous removal of hydrogen sulfide is achieved by utilizing the absorbing composition in one reactor to remove H.sub.2 S while the absorbing composition in the second reactor is regenerated. When the absorbing composition in the first reactor becomes sulfided to the extent desired, the absorbing composition in the second reactor is then utilized to remove H.sub.2 S while the absorbing composition in the first reactor is regenerated.

Abstract: Liquid hydrocarbon fuel compositions are provided containing antiknock quantities of ashless antiknock additives comprising cyclic diamines selected from 1,4-diazacycloalkanes.

Abstract: This invention provides a method and apparatus for maintaining the operating temperature in a device in which exhaust gases are passed from an engine through a fuel reformer in indirect heat exchange with fuel and steam in contact with a catalytic bed for steam reforming the fuel, the reformed fuel is brought into heat exchange relationship with the fuel and water entering the fuel reformer and thereafter the engine is operated utilizing this reformed fuel for lowering the amount of pollutant species from the engine.