Process for the production of aryl cyanates

Details Process for the production of aryl cyanates Process for the production of aryl cyanates

1997-01-08

1999-08-03

Gerstl, Robert

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

Organic compounds

Cyanate esters

C07C26102

Patent

active

059327626

ABSTRACT:
A process for the production of aryl cyanates of the general formula I: ##STR1## A phenol of the general formula II: ##STR2## a tertiary amine and cyanogen chloride, of which at least one of the three components is present as a solution in an organic solvent, are fed essentially simultaneously and continuously at a temperature of -20.degree. C. to 0.degree. C. and in a molar ratio of cyanogen chloride to the reactive hydroxy groups of the phenol of 1.0:1.0 to 1.2:1.0 in a cooled loop reactor, so that the reaction components, before they come in contact with one another, are prediluted by the reaction mixture circulating in the loop reactor. Simultaneously, a stream of the reaction mixture corresponding to the fed volume of the reaction components is drawn off from the circulation.

REFERENCES:
patent: 5420342 (1995-05-01), Craig, Jr.

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