At about 8: 00 a.m. 15 a.m., the phosphorus trichloride workshop of Hubei Taisheng Chemical Co., Ltd., located in Yichang Chemical Fine Chemical Park of Xingfa Group in Xiaoting District Chemical Park, emitted smoke. It is judged that the inner tube of phosphorus trichloride reactor is leaking. After the accident, the company started the emergency plan, quickly controlled the scene and evacuated employees within 300 meters; Drain the water in the jacket to eliminate the explosion danger; Close the feed valve and seal the reaction kettle; Use fire water to treat leaked materials, and ensure that all treated sewage enters the company's accident emergency treatment pool. 10 or so, the site is completely controlled. According to the on-site inspection by the company's technicians, 30 kg of yellow phosphorus and 100 kg of phosphorus trichloride leaked. It is understood that there were 1 1 ton materials in the kettle at that time, including phosphorus trichloride mother liquor 10 ton and yellow phosphorus 1 ton.