Apparatus for removing vaporized unreacted isocyanate from a...

Details Apparatus for removing vaporized unreacted isocyanate from a... Apparatus for removing vaporized unreacted isocyanate from a...

2006-03-10

2008-10-07

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

C422S105000, C422S108000, C422S131000, C422S168000, C422S177000, C422S180000

Reexamination Certificate

active

07431907

ABSTRACT:
An apparatus includes a container that defines an interior. The interior is isolated from ambient atmosphere for receiving a composition that includes isocyanate. A conduit extends into the container and defines a channel therethrough. An interior of the container is in fluid communication with the ambient atmosphere through the channel for conveying a gaseous waste stream that includes vaporized unreacted isocyanate out of the container and into the ambient atmosphere. A medium is disposed in the channel and has free isocyanate-reactive groups for reacting with unreacted isocyanate. The free isocyanate-reactive groups remove the unreacted isocyanate from the gaseous waste stream. The medium, by including the free isocyanate-reactive groups, relies on a chemical reaction to remove the unreacted isocyanate.

REFERENCES:
patent: 4585625 (1986-04-01), Chadwick et al.
patent: 5078980 (1992-01-01), Mullner et al.

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