It has been produced in our country, all by oxalyl chloride technological process.For using oxalyl chloride, so it has high price and low occupy in the market.

• 本文用光气法路线进行试验，用廉价的光气代替草酰氯制备异氰酸酯，为了降低成本提高收率，我们对杀铃脲的光气法生产路线进行了研究、开发和优化。