| 摘要 |
Method for producing hexachlorocyclobutene from hexachlorobutadiene, wherein technical hexachlorobutadiene is rectified at a pressure of 2-10 mm Hg with a reflux ratio of 300-600, and the hexachlorobutadiene remaining in the sump during this procedure, after a heat treatment at 150 DEG -200 DEG C., is recycled into the rectifying column together with fresh, technical hexachlorobutadiene. The product rich in hexachlorocyclobutene, withdrawn overhead, is optionally subjected to a fractional crystallization. |
