Method for production propylene from a flow containing C 4...

Details Method for production propylene from a flow containing C 4... Method for production propylene from a flow containing C 4...

2003-06-05

2008-09-16

Caldarola, Glenn (Department: 1797)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By c content reduction, e.g., cracking, etc.

C585S653000, C208S120010, C208S130000

Reexamination Certificate

active

07425663

ABSTRACT:
In a method for the production of propylene, a charge stream containing C4to C6olefins is evaporated, superheated, mixed with hot water vapor, the olefins vapor mixture converted on a zeolite catalyst, the reaction mixture formed thereby cooled, and then partially condensed. In order to increase the yield of propylene, the gaseous phase containing ethylene, propylene, C4to C8olefins, and additional hydrocarbons that is accumulated during the partial condensation is compressed, the gaseous and liquid phase containing propylene, ethylene, and other light hydrocarbons that exit from the compression step is separated into a gaseous phase containing propylene, ethylene, and other light hydrocarbons and a liquid phase containing C4+ olefins, and the liquid phase is separated into a fraction containing C4to C6olefins and a fraction containing C7+ olefins.

REFERENCES:
patent: 5981819 (1999-11-01), Moeller et al.

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