PROCESS FOR PRODUCING VINYL CHLORIDE BY SPLITTING 1,2-DICHLOROETHANE BY HEAT EFFECT AND DEVICE FOR IMPLEMENTING THE PROCESS,申请号HU19870004519-传众专利搜索

PROCESS FOR PRODUCING VINYL CHLORIDE BY SPLITTING 1,2-DICHLOROETHANE BY HEAT EFFECT AND DEVICE FOR IMPLEMENTING THE PROCESS

申请公布号：HU202175(B)

申请号：HU19870004519

申请日期：1987.10.08

申请公布日期：1991.02.28

申请人：

HOECHST AG

发明人：FROEHLICH WALTER;SCHAFFELHOFER IWO;KRUMBOECK REINHARD;LINK GERHARD;PRANTL GEORG

分类号：C07C21/06;B01D3/06;B01J10/00;C07C;C07C17/00;C07C17/25;C07C67/00

主分类号：C07C21/06

摘要：The hot, vinyl chloride-containing gases leaving the cracking furnace heat liquid 1,2-dichloroethane in a first container to the boiling point or to its immediate vicinity, and the 1,2-dichloroethane is transferred into a second container in which it is partly evaporated under a lower pressure than in the first container. The evaporated 1,2-dichloroethane is fed into the cracking furnace, and the nonevaporated 1,2-dichloroethane is fed back into the first container. By supplying fresh, optionally prewarmed 1,2-dichloroethane into the second container, the amount of product evaporated therein is replaced, the prewarming advantageously being regulated through the level of the liquid 1,2-dichloroethane in the second container. The prewarming of the 1,2-dichloroethane can take place in the convection zone of the cracking furnace or by means of a temperature-control medium, for example steam, which has been heated in the convection zone of the cracking furnace. Compared to processes according to the prior art, higher cracking conversions and a more favorable energy utilization are achieved.