Synthesis method of tertiary butyl isocyanate

The invention relates to a synthesis method of tertiary butyl isocyanate. The method comprises the following steps of mixing an inert solvent and para toluene sulfonamide, introducing phosgene at 100DEG C to 120 DEG C, feeding an inert gas for driving gas after reaction, and thus obtaining a first reaction solution; at 0 DEG C to 20 DEG C, dropwise adding tert-butylamine into the first reaction solution, heating and refluxing for 4h or more, and thus obtaining a second reaction solution; separating and purifying the second reaction solution to obtain tertiary butyl isocyanate. According to the synthesis method of tertiary butyl isocyanate, the stability and the yield of the process can be improved, and the purity of the obtained tertiary butyl isocyanate product is higher. 种叔丁基异氰酸酯的合成方法，包括以下步骤：将惰性溶剂和对甲苯磺酰胺混合，在100℃～120℃引入光气，反应完后通入惰性气体赶气，得到第反应液；在0℃～20℃，向第反应液中滴加叔丁胺，加热回流4小时以上，得到第二反应液；将第二反应液分离提纯，得到叔丁基异氰酸酯。上述叔丁基异氰酸酯的合成方法可提高工艺的稳定性和收率，得到的叔丁基异氰酸酯产品的纯度也较高。