Phosgene having low content of carbon tetrachloride

Details Phosgene having low content of carbon tetrachloride Phosgene having low content of carbon tetrachloride

2005-08-16

2005-08-16

Richter, Johann (Department: 1621)

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

Organic compounds

Carboxylic halides

C562S848000, C558S265000

Reexamination Certificate

active

06930202

ABSTRACT:
A process for producing phosgene having low content of carbon tetrachloride is disclosed. The process entails reacting carbon monoxide with chlorine in the presence of elemental carbon, in a reactor. Critically the temperature of the gas stream emerging from the reactor is restricted to 30 to 80° C. and its pressure, measured directly downstream from said reactor is restricted to 120 to 400 kPaabs. The phosgene thus produced has a content of carbon tetrachloride that is less than 150 ppm.

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