Method of producing N--substituted carbamic acid esters, process for producing the isocyanate using the N--substituted carbamic acid esters, for transfer include aromatic hydroxy compounds and N--substituted carbamic acid ester of N--substituted carbamic acid ester and for storage composition

摘要

A method and a hydroxy compound containing an organic amine, a carbonic acid derivative, a hydroxy compound of one or more, will be produced from the organic amine N--substituted carbamic acid esters, the present invention includes organic amines , can be reacted using a urethane production reactor equipped with a condenser, a carbonic acid derivative, and the hydroxy composition, Introduced into a condenser that is provided in the urethane production reactor, a gas containing a compound having a the hydroxy composition, a carbonyl group derived from the carbonic acid derivative, and ammonia formed as a by-product in the reaction, the hydroxy composition condensing a compound having a thing, a carbonyl group derived from the carbonic acid derivative, and a method of manufacturing a N--substituted carbamic acid ester, For compounds having a carbonyl group derived from the carbonic acid derivative which is the condensed hydroxy compound contained in the hydroxy composition is the condensed, wherein 1 or more in the stoichiometric ratio, From the condenser, (-C (= O) -) carbonyl groups contained in compounds having carbonyl groups contained in ammonia recovered as a gas, derived from the carbonic acid derivative and number of the ratio of the number of ammonia molecules But, to provide a process for the preparation is less than or equal to 1.