One-step catalytic process for the synthesis of isocyanates

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United States of America Patent

PATENT NO 7423171
APP PUB NO 20070293696A1
SERIAL NO

11765449

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Abstract

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A one-pot process for the synthesis of isocyanates, polyisocyanates or mixtures thereof which includes the steps of: i. preparing a mixture comprising an amine, an alcohol, an oxygen-containing gas, carbon monoxide, a metal complex catalyst selected from the group consisting of macrocyclic complex catalysts and cobalt Shiff base catalysts; and a solvent selected from the group consisting of aliphatic or aromatic halocarbons, perhalogenated alcohols, halogenated ethers, halogenated ketones, perfluorinated hydrocarbons, polymers of chlorotrifluoroethylene having the formula --(CF.sub.2--CFCl).sub.n wherein n is between 2 and 10, and mixtures thereof; ii. subjecting the resulting mixture to a first heating under pressure; iii. cooling and depressurizing the mixture resulting from the previous step; and iv. subjecting the mixture of the previous step to a second heating to separate out the isocyanate product from the mixture.

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Patent Owner(s)

Patent OwnerAddress
REPSOL YPF S APASEO DE LA CASTELLANA 278 MADRID 28046

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aghmiz, Ali Tarragona, ES 3 2
Almena, Munoz Beatriz Madrid, ES 2 4
Castillon, Miranda Sergio Tarragona, ES 1 2
Claver, Cabrero Carmen Tarragona, ES 2 2
Orejon, Alvarez Arancha Tarragona, ES 1 2
Padilla, Polo Ana Madrid, ES 1 2
Salagre, Carnero Pilar Tarragona, ES 1 2
Serrano, Fernandez Francisco Luis Madrid, ES 1 2

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