BaF(p-BDC)0.5 as the Catalyst Precursor for the Catalytic Dehydrochlorination of 1-Chloro-1,1-Difluoroethane to Vinylidene Fluoride

Catalysts

Wei Yu¹  Houlin Yu¹  Wenfeng Han¹  Chuanzhao Wang¹  Yongnan Liu¹  Wucan Liu²  Feixiang Zhou²  Jianjun Zhang²  Shucheng Wang²  Jiuju Wang²  Wanjin Yu² 

[1] Institute of Industrial Catalysis, Zhejiang University of Technology, Chaowang Road 18, Hangzhou 310014, Zhejiang, China;State Key Laboratory of Fluorinated Greenhouse Gases Replacement and Control Treatment, Zhejiang Research Institute of Chemical Industry, Tianmushan Road 387, Hangzhou 310032, Zhejiang, China;

关键词: barium fluoride;    catalytic pyrolysis;    dehydrochlorination;    1-chloro-1,1-difluoroethane;    vinylidene fluoride;   

DOI  :  10.3390/catal11111268

来源: DOAJ

【 摘 要 】

A BaF(p-BDC)_0.5 catalyst was prepared by solid state reaction at room temperature with Ba(OH)₂ as precursor, NH₄F as F source, and H₂(p-BDC) as organic ligand. The calcined samples were used as catalysts for dehydrochlorination of 1-chloro-1,1-difluoroethane to generate vinylidene fluoride (VDF) at 350 °C. Commercial production of VDF is carried out at 600–700 °C. Clearly, pyrolysis of the BaF(p-BDC)_0.5 catalyst provided a promising way to prepare VDF at low temperatures. Prior to calcination, the activity of the BaF(p-BDC)_0.5 catalyst was low. Following calcination at high temperatures, BaF(p-BDC)_0.5 decomposed to BaF₂ and BaCO₃, and then the catalyst was chlorinated and fluorinated to BaClF, which showed high activity and stable VDF selectivity for dehydrochlorination of 1-Chloro-1,1-Difluoroethane to VDF.

【 授权许可】

Unknown