摘要
将酸碱盐改性的TS-1分子筛用于甲乙酮(MEK)氨氧化反应中,考察了改性物质、反应温度、原料摩尔比、催化剂用量和后续反应时间对反应的影响及催化剂的重复使用与再生性能。结果表明:Zn(NO3)2改性的TS-1为适宜催化剂,较优的工艺条件是反应温度为70℃,n(NH3)∶n(MEK)∶n(H2O2)=3.5∶1∶2,每mol MEK需用催化剂为12 g,反应时间为2.5 h,MEK转化率可达到97.9%,甲乙酮肟(MEKO)选择性为99.6%。催化剂可重复使用3次,经400℃焙烧再生后催化性能基本恢复。
TS-1 molecular sieve was modified with acid,alkali,salt,and used in the ammoxidation reaction of methyl ethyl ketone（MEK）.The effects of modified material,reaction temperature,molar ratio of raw materials,mass of catalyst,and reaction time on the reaction,reusability and regeneration of the catalyst were investigated.The result shows that Zn（NO3）2-modified TS-1 is the optimum catalyst.The optimum reaction conditions are as follows： reaction temperature 70 ℃,n（NH3） ∶ n（MEK） ∶ n（H2O2） =3.5 ∶ 1 ∶ 2,12 g TS-1 for 1 mol MEK,reaction time 2.5 h.Under the optimal reaction conditions,the conversion of methyl ethyl ketone（MEK） is up to 97.9%,and the selectivity of methyl ethyl ketoxime（MEKO） is up to 99.6%.The catalyst can be reused three times,and the catalytic properties of TS-1 can be recovered after calcination at 400 ℃.
出处
《化学工程》
CAS
CSCD
北大核心
2011年第1期53-57,共5页
Chemical Engineering(China)
关键词
TS-1
改性
甲乙酮肟
催化性能
TS-1
modification
methyl ethyl ketoxime
catalytic properties
