本发明涉及一种成盐‑雾化光气化法制备异氰酸酯的方法，首先将胺与氯化氢进行混合制备胺盐酸盐，然后在光化反应器中盐酸盐流股被雾化喷嘴喷射出的高速惰性气体流雾化，与光气反应制备异氰酸酯，离开反应器的异氰酸酯在捕汲塔中冷却。本发明避免了传统气相法胺直接高温气化造成的损失，而且解决了传统液相法盐酸盐和光气反应效率低的问题。

The invention relates to a method for preparing isocyanate by a salifying-atomizing phosgenation method. The method comprises the following steps: mixing amine and hydrogen chloride to prepare amine hydrochloride, atomizing the hydrochloride stream in a photochemical reactor by a high-speed inert gas stream sprayed by an atomizing nozzle, reacting with phosgene to prepar isocyanate, and cooling the isocyanate leaving the reactor in a swabbing tower. According to the method, the loss caused by direct high-temperature gasification of the amine in a traditional gas phase method is avoided, and the problem of low reaction efficiency of the hydrochloride and the phosgene in a traditional liquid phase method is solved.