摘要
采用二(2-乙基己基)磷酸、2-乙基己基磷酸-2-乙基己基酯、磷酸三丁酯及正辛醇4种萃取剂,通过萃取法合成了4种钒氧配合物。钒氧配合物的结构用元素分析仪及红外光谱(IR)仪表征,聚合产物结构用凝胶渗透色谱仪(GPC)、差热(DSC)及核磁共振波谱(13C NMR)仪测定。结果表明,合成的钒氧配合物在Et3Al2Cl3的活化下,常压下催化乙烯聚合反应的活性为23～57 kg/(mol.h),产品为线性高密度聚乙烯,黏均相对分子质量为4 800～9 500,相对分子质量分布为4.5左右,熔点在136～138℃之间。
Four extraction agents,i.e.di-（2-ethylhexyl）-phosphoric acid（P 204）,2-ethylhexyl phosphoric acid mono-（2-ethylhexyl） ester（P 507）,tributyl phosphate（TBP） and 1-octanol（NOOH）,were used to synthesize oxo-vanadium complexes by extraction method,and the synthesized complexes were used as catalysts for ethylene polymerization.These four complexes were characterized by elemental analysis,FT-IR and the structures of the polymerization products were characterized by GPC,DSC and 13 C NMR.Test results showed that under atmospheric pressure,activated by Et 3 Al 2 Cl 3,the catalytic activities for ethylene homopolymerization of these catalysts were in the range of 23—57 kg/（mol.h）,and the obtained polymers were linear high density polyethylene,with M ν =（4.8—9.5） × 10 3,PDI =4.5,T m = 136—138 ℃.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2012年第8期44-47,共4页
Petroleum Processing and Petrochemicals
基金
广西教育厅科研项目(200911LX435)
钦州市科学研究与技术开发计划项目(20093203)
钦州学院科研项目(2010XJKY-48C)
关键词
钒氧配合物
萃取
乙烯
聚合
oxo-vanadium complex
extraction
ethylene
polymerization
