Abstract: Vinylidene fluoride is one of the most important monomers in fluorine industry，which is mainly prepared by the pyrolysis of 1-chloro-1,1-difluoroethane (HCFC-142b) at high temperature. This research progress in the pyrolysis mechanism of HCFC-142b to vinylidene fluoride was introduced. The technologies and the development trend of catalytic pyrolysis of HCFC-142b were reviewed together with the improvements in the structure of cracking tube. In addition，study on the rectification of vinylidene fluoride was discussed. It is proposed that in-depth study on the mechanism of the pyrolysis of HCFC-142b and the effects of the material and structure of cracking tube should be conducted. Learning from the research progress in the pyrolysis of hydrocarbons，the difficulty of high energy consumption，catalyst loss，coking and other problems faced in the pyrolysis of HCFC-142b will be solved.

Key words: 1-chloro-1,1-difluoroethane, vinylidene fluoride, mechanism, pyrolysis technology, rectification

摘要： 偏氟乙烯是氟化工行业重要的单体，主要由1-氯-1,1-二氟乙烷（HCFC-142b）裂解制备，本文介绍了HCFC-142b裂解制备偏氟乙烯反应机理的研究进展，对HCFC-142b催化裂解工艺进行了评述和展望，综述了HCFC-142b裂解管结构改进的研究进展，对偏氟乙烯精馏分离工艺进行了评述。提出应深入研究HCFC-142b裂解机理，进一步研究裂解管材质和结构对HCFC-142b裂解过程的影响，并借鉴烃类裂解制乙烯的研究进展解决HCFC-142b裂解过程中面临的高能耗、催化剂流失、结焦等难题。

关键词: 1-氯-1, 1-二氟乙烷, 偏氟乙烯, 反应机理, 裂解技术, 精馏