The polymerization of acrylonitrile was first studied using (C9H7)2Y(μ-Et)2AlEt2 as a single-component catalyst. The catalytic activity could be greatly increased when PhONa was added to the catalyst in amount o...The polymerization of acrylonitrile was first studied using (C9H7)2Y(μ-Et)2AlEt2 as a single-component catalyst. The catalytic activity could be greatly increased when PhONa was added to the catalyst in amount of n(PhONa)/n(Cat)=3. A mechanism related to the polymerization initiation of AN is proposed.展开更多
基金Project(2023JJ40623)supported by the Hunan Provincial Natural Science Foundation,ChinaProject(2023B1212060048)supported by Science and Technology Planning Project of Guangdong Province,China+2 种基金Project(22QDZ50)supported by Research Foundation for Ph D of Xiangtan University,ChinaProject(23B0153)supported by Excellent Youth Funding of Hunan Provincial Education Department,ChinaProject supported by the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province,China。
基金Project(2022YFB3803300)supported by the National Key Research and Development Program of ChinaProject(52173192)supported by the National Natural Science Foundation of ChinaProject(2023JJ40040)supported by the Natural Science Foundation of Hunan Province,China。
文摘采用共沉淀法制备镁铝双金属氢氧化物(LDHs)功能材料,并在500℃焙烧得到改性的层状氢氧化镁铝(LDO),利用XRD和FTIR对改性前后的产物结构进行表征。以LDO为吸附剂、水中苯甲酸为研究对象,具体考察了吸附剂的投加量、p H、吸附平衡时间及恒温水浴振荡温度等实验条件对苯甲酸脱除效果的影响。结果表明,在25 m L质量浓度为0.6 g/L的苯甲酸溶液中,吸附剂投加量0.8 g,p H=8.0,吸附60 min,(25±0.5)℃的条件下脱除效果较佳,脱除率可达到77.9%。此外,吸附反应较符合Langmuir吸附等温模型,该吸附是一个自发放热反应,吸附热为-17.01 k J/mol。
文摘The polymerization of acrylonitrile was first studied using (C9H7)2Y(μ-Et)2AlEt2 as a single-component catalyst. The catalytic activity could be greatly increased when PhONa was added to the catalyst in amount of n(PhONa)/n(Cat)=3. A mechanism related to the polymerization initiation of AN is proposed.