摘要
在氟化镁基催化剂作用下,以催化氟化1,1,1,3-四氯-4,4,4-三氟丁烷(HCFC-343jfd)合成反式-1,1,1,4,4,4-六氟-2-丁烯(E-HFO-1336mzz)为研究对象,开展了反应温度、物料比、接触时间及催化剂的寿命实验。结果表明,最佳反应条件为反应温度300℃,HF与HCFC-343jfd的摩尔比为15∶1,停留时间6 s,在该条件下,HCFC-343jfd的转化率为100%,E-HFO-1336mzz的选择性为95.1%,且连续反应300 h后,HCFC-343jfd的转化率>99.0%,E-HFO-1336mzz的选择性>94.5%。采用新型无铬催化剂,获得了最佳E-HFO-1336mzz反应工艺,具有较高的氟化工业应用前景。
Synthesis of trans-1,1,1,4,4,4-hexafluoro-2-butene(E-HFO-1336 mzz)from 1,1,1,3-tetrachloro-4,4,4-trifluoro-butane(HCFC-343 jfd)and anhydrous hydrogen fluoride was studied by catalytic fluorination over MgF2-based catalyst.The effect factors,including reaction temperature,ratio of HF and HCFC-343 jfd,contact time and lifetime of catalyst,were researched.The results indicated the optimal reaction condition:temperature 300℃,flow ratio of HF and HCFC-343 jfd=15∶1 and the contact time of 6 s.Under the optimal reaction condition,the conversion of HCFC-343 jfd was 100%and the selectivity of E-HFO-1336 mzz was up to 95.1%.After 300 h of continuous reaction,the conversion of HCFC-343 jfd and the selectivity of E-HFO-1336 mzz were above 99.0%and 94.5%respectively.The reaction process of E-HFO-1336 mzz is optimized by using non-chromium catalyst,which has shown a great potential fluorochemical industry application.
作者
韩升
曾纪珺
赵波
贾兆华
秦越
毛伟
张伟
吕剑
HAN Sheng;ZENG Ji-jun;ZHAO Bo;JIA Zhao-hua;QIN Yue;MAO Wei;ZHANG Wei;Lü Jian(State Key Laboratory of Fluorine&Nitrogen Chemical,Xi’an 710065,China;Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)
出处
《应用化工》
CAS
CSCD
北大核心
2020年第9期2257-2260,共4页
Applied Chemical Industry
基金
陕西省重点产业创新链项目(2019ZDLGY06-01)
西安市高校人才服务企业项目(GXYD12.1)。
关键词
顺式-1
1
1
4
4
4-六氟-2-丁烯
反式-1
1
1
4
4
4-六氟-2-丁烯
1
1
1
3-四氯-4
4
4-三氟丁烷
氟化镁基催化剂
cis-1,1,1,4,4,4-hexafluoro-2-butene
trans-1,1,1,4,4,4-hexafluoro-2-butene
1,1,1,3-tetrachloro-4,4,4-trifluoro-butane
MgF2-based catalyst
