Patent ID: 6603035
Filing Date: 2003-08-05
Classification: C07C

Abstract:
A method for producing a high purity cyanate comprising reacting a phenol compound represented by the following formula (I): wherein each A independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, x represents a single bond, an organic group having 1 to 20 carbon atoms, a carbonyl group, a sulfone group, a divalent sulfur atom or an oxygen atom, i and n represent an integer from 0 to 4, with a cyanogen chloride at a temperature from âˆ’10Â° C. to 30Â° C. in the presence of a tertiary amine which is triethylamine, triethylamine, tripropylamine, tributylamine, dimethylethylamine, tripropylamine, tributylamine, dimethylethylamine, tribenzylamine, dimethylaniline or diethylaniline and a water-imiscible organic solvent in a reaction vessel equipped with an agitator under the condition that: the concentration of the phenol compound, shown in terms of percentage where the overall charged amount of the phenol compound is divided by the sum of the overall charged amount of the phenol compound and the overall charged amount of an organic solvent, is 20 to 50%; and the value of (n) x d2/3 is 8 or more, where the rotational speed is n (rpm) and the diameter of an impeller is d (m).