P. 40-46 /

Phosgenation reactions with phosgene from triphosgene

Technische Universitaet Muenchen
Department Chemistry, Lichtenbergstr. 4, Garching, D-85748, Germany


Presented is a method to combine advantageous propertiesof both phosgene and triphosgene (solid phosgene, BTC)in a two-step process for typical phosgenation reactionsto form chloro-carbonates and isocyanates. Also a 5 kgtriphosgene batch process for the synthesis of benzylchloroformate within a loop reactor is documented. Scopeand limitations of these triphosgene applications arediscussed. A concept for a small-scale batch processingphosgene generator ready for construction is presented.