Catalytic Gas-phase Fluorination of Hexachlorobutadiene to 1,2-Dichlorotetrafluorocyclobutene over Cr/Zn-based Catalysts
作者:Jinwei He、Mengxue Zhang、Biao Zhou、Xiaomeng Zhou
DOI:10.1002/jccs.201700274
日期:2018.6
activity (1.318 mmol/h/g) at 390 °C and the Cr/Co/Zn catalyst showed the best DTB selectivity (42.5%) at 350 °C. Compared to that of gaseous HF, the catalytic performance of the Cr/Co/Zn catalyst after treatment by HF + O2 and CF2O increased considerably, whereas for HF + Cl2 and CF2Cl2 it showed little effect. In order to identify the different species (Cr─O, Cr─F, CrO xF y) present on catalysts’ surface
本文在一系列Cr / M / Zn催化剂(M = Ni,Co,Cu,In,Al)上进行了六氯丁二烯(HCBD)的气相氟化反应以合成1,2-二氯四氟环丁烯(DTB)。 。预氟化的由不同的氟化剂(HF,95%HF + 5%的Cl影响2,95%HF + 5%氧气2,CF 2 O,CF 2氯2)对Cr / Co / Zn样品的催化性能也进行了研究。在Cr / Zn催化剂中添加促进剂可以显着改善其催化性能。Cr / Ni / Zn催化剂在390°C时表现出最佳的催化活性(1.318 mmol / h / g),Cr / Co / Zn催化剂在350°C时表现出最佳的DTB选择性(42.5%)。与气态HF相比,用HF + O 2和CF 2 O处理后的Cr / Co / Zn催化剂的催化性能明显提高,而对于HF + Cl 2和CF 2 Cl 2则显示出很小的影响。为了识别不同的物种(Cr-O,Cr- F