Process and apparatus for the recovery of ethylene glycol in...

Details Process and apparatus for the recovery of ethylene glycol in... Process and apparatus for the recovery of ethylene glycol in...

2011-05-31

2011-05-31

Davis, Brian J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S868000, C568S870000, C528S308100

Reexamination Certificate

active

07951980

ABSTRACT:
A method and apparatus are disclosed for the recovery of ethylene glycol in a polyethylene terephthalate (PET) production process, in which water accumulating in the esterification reaction is mixed with a process fluid containing 2-methyl-1,3-dioxolane (MDO). The mixing is carried out in a tank arranged upstream of a rectification column. Through the increase in the water content in the fluid, a shift in the reaction equilibrium takes place and consequently a cleavage of the 2-methyl-1,3-dioxolane present into ethylene glycol and acetaldehyde takes place. Following the cleavage reaction, the mixture is fed from the tank into a rectification column, whereby the ethylene glycol produced from the cleavage reaction is returned to the PET production process.

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