Removal of water from a phosgene recycle stream

Details Removal of water from a phosgene recycle stream Removal of water from a phosgene recycle stream

1992-12-30

1994-11-08

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

560347, B01D 1504

Patent

active

053623991

ABSTRACT:
The invention relates to a process for removing water traces from a liquid phosgene stream in chemical processes which employ a phosgenation step. Water traces are removed from a liquid phosgene stream containing at least 60 weight percent phosgene by contacting the stream with a strongly basic macroreticular anion exchange resin which catalyzes the reaction between phosgene and the water traces.

REFERENCES:
patent: 3367889 (1968-02-01), Oline
patent: 3928542 (1975-12-01), Bakay
patent: 4101577 (1978-07-01), Smathers
patent: 4221871 (1980-09-01), Meitzner et al.
patent: 4745216 (1988-05-01), Keggenhoff et al.
Kunin, Robert et al., "Communications to the Editor," vol. 84, pp. 305-306 (Jan. 20, 1962).

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