A method of manufacturing aromatic urethanes

C - Chemistry – Metallurgy – 07 – C

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260/468.8, 260/5

C07C 269/04 (2006.01) C07C 269/00 (2006.01) C07C 271/28 (2006.01) C07C 273/18 (2006.01) C07C 275/28 (2006.01)

Patent

CA 2012624

Abstract of the Disclosure A method of manufacturing aromatic urethanes util- izes a urea production process wherein a primary arom- atic amine, an aromatic nitro-compound and carbon monoxide are made to react together in the presence of a catalyst and solvents, to produce N,N'-disubstituted urea, the solvent used in said urea production process consisting at least partly of an amide or oxygen- containing sulfur compound, and having the functions of stabilizing said catalyst and preventing it from sepa- rating out in a solution, and of increasing the activity of the catalyst, the quantity of said solvent being suf- ficient to permit it to fulfil these functions effec- tively. The method additionally includes an aromatic urethane production process wherein the N,N'- disubstituted urea produced is made to react with an organic compound containing hydroxyl groups, to produce a primary aromatic amine and aromatic urethane, the pri- mary aromatic amine being separated to obtain the aroma- tic urethane.

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