Procedure for the preparation of alkyl isocyanates

Details Procedure for the preparation of alkyl isocyanates Procedure for the preparation of alkyl isocyanates

1993-05-11

1994-05-24

Prescott, Arthur C.

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

Organic compounds

Isocyanate esters

C07C26300

Patent

active

053150341

ABSTRACT:
Multistep process for the preparation of alkyl mono and diisocyanates consisting in reacting the corresponding aliphatic amine or diamine with dimethylcarbonate and, substantially, in partially vaporizing and converting the urethane thus formed in an evaporator to subsequently terminate the cracking in a II.degree. reactor, and finally subjecting the cracking product to fractional distillation at reduced pressure, recycling the unconverted part to the partial vaporization step.

REFERENCES:
patent: 4596678 (1986-06-01), Merger et al.
patent: 4613466 (1986-09-01), Merger et al.
patent: 5126480 (1992-06-01), Sofranko et al.
patent: 5157155 (1992-10-01), Sakamoto et al.
patent: 5189205 (1993-02-01), McGhee et al.
Chemical Abstracts, vol. 114, No. 24, Jun. 17, 1991, "Chemistry of Synthetic High Polymers", Abstract No. 229599.

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