System and process for production of toluene diisocyanate

Details System and process for production of toluene diisocyanate System and process for production of toluene diisocyanate

2008-06-18

2011-10-11

Katakam, Sudhakar (Department: 1621)

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

Organic compounds

Isocyanate esters

C560S347000, C560S352000

Reexamination Certificate

active

08034972

ABSTRACT:
A method for producing toluene diisocyanate is disclosed which comprises forming a dispersion comprising phosgene gas bubbles dispersed in toluene diamine liquid phase, wherein said gas bubbles have a mean diameter less than 1 micron; and subjecting the dispersion to phosgenation reaction conditions, whereby at least a portion of the toluene diamine is phosgenated to form toluene diisocyanate. A system for carrying out the phosgenation of toluene diamine is also disclosed.

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