Novel Ni（II）-based acetyliminopyridine complexes 1b, 2b, 3b （1-3b）, which are synthesized from ligands 1a, 2a, 3a （1-3a） and [NiCl2（DME）], are suitable precursors for the catalysts that are necessary for ethyl...Novel Ni（II）-based acetyliminopyridine complexes 1b, 2b, 3b （1-3b）, which are synthesized from ligands 1a, 2a, 3a （1-3a） and [NiCl2（DME）], are suitable precursors for the catalysts that are necessary for ethylene oligomerization and polymerization reactions, activated by methylaluminoxane （MAO）. The MAO-treated 1-3b presents an active catalytic center, which may oligomerize and polymerize ethylene to produce linear α-olefins and polyethylene, respectively. The molecular weight distributions of oligomers that are obtained are in good agreement with the Schulz-Flory rules for oligomers〉C4. The activity of 3b-MAO complex is 6.3×10^7 g/（molNi.h） at 50 ℃. The activities and molecular weight distributions of oligomers show significant reliance on the structures of catalyst precursors.展开更多
以芳烃抽余油为加氢原料,高效镍基均相络合催化剂为活性中心,在100 m L固定床加氢装置上进行加氢脱芳反应,考察了工艺条件对镍基均相络合催化剂催化抽余油加氢性能的影响,研究了剂油分离及分离后催化剂的性能。实验结果表明,在反应压力1...以芳烃抽余油为加氢原料,高效镍基均相络合催化剂为活性中心,在100 m L固定床加氢装置上进行加氢脱芳反应,考察了工艺条件对镍基均相络合催化剂催化抽余油加氢性能的影响,研究了剂油分离及分离后催化剂的性能。实验结果表明,在反应压力1.7 MPa、温度130~150℃、氢油体积比150~160、剂油质量比0.03~0.04反应条件下催化剂具有最佳的加氢脱芳性能,加氢产品通过产品分离塔将产品与催化剂分离,加氢后抽余油中苯的含量从30 g/kg降低至7.8 mg/kg,烯烃碘值(100 g油)降低至小于4.0 mg,分离后催化剂的活性未见下降。展开更多
基金This work is supported by PetroChina Company Limited (No.030414-01)
文摘Novel Ni（II）-based acetyliminopyridine complexes 1b, 2b, 3b （1-3b）, which are synthesized from ligands 1a, 2a, 3a （1-3a） and [NiCl2（DME）], are suitable precursors for the catalysts that are necessary for ethylene oligomerization and polymerization reactions, activated by methylaluminoxane （MAO）. The MAO-treated 1-3b presents an active catalytic center, which may oligomerize and polymerize ethylene to produce linear α-olefins and polyethylene, respectively. The molecular weight distributions of oligomers that are obtained are in good agreement with the Schulz-Flory rules for oligomers〉C4. The activity of 3b-MAO complex is 6.3×10^7 g/（molNi.h） at 50 ℃. The activities and molecular weight distributions of oligomers show significant reliance on the structures of catalyst precursors.
