Process for the production of isocyanates and for working up the

Details Process for the production of isocyanates and for working up the Process for the production of isocyanates and for working up the

1992-12-15

1994-10-11

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 70, 203 73, 203DIG25, 560352, 528502, 528902, B01D 334

Patent

active

053544323

ABSTRACT:
A process for the production of pure distilled isocyanates in which the corresponding amine is reacted with phosgene in a suitable solvent and working up of the isocyanate containing solution obtained by multistage distillation into pure isocyanate, pure solvent and a residue. The residue is then charged to a vessel containing at least one hydrocarbon having a high boiling point. The contents of this vessel are then heated with stirring to distill off any free isocyanate present. The remaining residue is a solid which may be disposed of readily.

REFERENCES:
patent: 2889257 (1959-06-01), Griffin et al.
patent: 3658656 (1972-04-01), Adica et al.
patent: 3729386 (1973-04-01), Irwin et al.
patent: 3884951 (1975-05-01), Oswald
patent: 3892634 (1975-07-01), Hajek et al.
patent: 3897314 (1975-07-01), Diebsch et al.
patent: 3912600 (1975-10-01), Hatfield, Jr. et al.
patent: 4065362 (1977-12-01), Kataoka et al.
patent: 4289589 (1981-09-01), Koehler et al.
patent: 4297456 (1981-10-01), Reischl et al.
Ullmanns Encyklopadie der technischen Chemie, rth Edition, vol. 13, pp. 347-357, Verlag Chemie CmbH, D-6940 Weinheim, 1977.

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