Blanchard, Flynn, Thiel, Boutell & Tanis
Process for preparing isocyanic acid derivatives
 Isocyanic acid derivatives are prepared by reacting an organic halogen compound with an alkali cyanate in N,N-disubstituted organic acid amides, N,N-disubstituted sulfonic acid amides, sulfoxides, sulfones or macrocyclic polyethers, at 70.degree. to 200.degree. C, in the presence of organic polyhalogen compounds selected from compounds having dihalogenomethyl group, dihalogenomethylene group, or trihalogenomethyl group and tetrahalogenomethane, in an amount in the range of from 1 to 20 weight percent based on the weight of said organic halogen compounds. 
Kao Soap Co., Ltd.
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C07C C07D
inventional inventional
Atsushi Fumio Masahiro Hisao Yoshiaki Yoshiaki Susumu Sadashi
Nishibata Tanimoto Saito Kitano Tanaka Inamoto Handa Ueda