Process for producing xylylene diisocyanate

Details Process for producing xylylene diisocyanate Process for producing xylylene diisocyanate

1991-11-12

1993-03-23

Dees, Jose G.

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

Organic compounds

Isocyanate esters

521159, 560360, C07C26304

Patent

active

051965720

ABSTRACT:
Xylylene diisocyanate is produced in higher space-time yield with higher selectivity by thermal decomposition of xylylene dicarbamate as an urethane compound, i.e. by subjecting the urethane compound to reactive distillation with a thermal decomposition catalyst of at least one of metals selected from antimony and tin or their compounds in the presence of an inert solvent having a higher boiling point than that of the resulting xylylene diisocyanate under reduced pressure of 1 to 500 mmHg and at 150.degree. to 350.degree. C. and then subjecting the resulting reaction products as distillates to partial condensation outside the reactive distillation system, thereby separately recovering the resulting alcohol and xylylene diisocyanate.

REFERENCES:
patent: 4330479 (1982-05-01), Merger et al.
patent: 4530796 (1985-07-01), Mattner et al.
patent: 4873365 (1989-10-01), Luh et al.
patent: 4879410 (1989-11-01), Singh et al.

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