Processes and systems for making phosgene

Details Processes and systems for making phosgene Processes and systems for making phosgene

2007-07-31

2007-07-31

Hendrickson, Stuart (Department: 1754)

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

Organic compounds

Carboxylic halides

Reexamination Certificate

active

10604549

ABSTRACT:
One process for producing phosgene comprises: introducing a carbon monoxide stream to a metal oxide impregnated activated carbon, reducing a hydrogen sulfide concentration in the carbon monoxide stream to produce a cleaned stream, wherein a cleaned stream hydrogen sulfide concentration is less than or equal to about 20 ppm, and reacting carbon monoxide in the cleaned stream with chlorine to produce phosgene.

REFERENCES:
patent: 4039619 (1977-08-01), Steiner
patent: 4556547 (1985-12-01), Nishino et al.
patent: 1112997 (2001-07-01), None
patent: WO 02/08362 (2002-01-01), None
Chemical Abstracts and Indexes, American Chemical Society, Jul. 2, 1990, XP000063501, ISSN: 0009-2258; “Manufacture of High-Purity Phosgene Gas”, Abstract Only, 1 page.
International Search Report, International Application No. PCT/US2004/023429; International Filing date: Jul. 21, 2004; Date of Mailing: Nov. 22, 2004; 6 pages.

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