The Synthesis Of Novel Supported Catalysts For Olefin Polymerization

In this paper, Zeolite Beta was prepared as a carrier by hydrothermal crystallizationmethod. A series of new Mono(imino)pyrroles were synthesized. Several coordinationcomplexes which have the potential olefin polymerization catalytic properties were alsoprepared as the raw material of the mono(imi-no)pyrroles and late transition metal Ni(II). Theloading of related coordination complexes on the Zeolite Beta was explored.Using TEOS as silica source, NaAlO2as aluminum source, TEAOH as structuraltemplate agent, Zeolite Beta with good degree of crystallinity were obtained under theconditions that the ratio of raw material at n(TEA+)/n(SiO2)=0.3, n(Na2O)/n(SiO2)=0.035,n(H2O)/n(SiO2)=7-15, n(SiO2)/n(Al2O3)=25-70. The aging and crystallizing time were3hand3d. The crystallizing temperature was140℃. The ways of exchanging of Zeolite Betawith ammonium salt and decomposing ammonium were studied. We found that make fewerdamage to zeolite Beta structure by grading temperature calcination than by directly hightemperature calcinations.Using2-acetylpyrrole and a couple of aromatic amines as the raw material, elevenmono(imino)pyrroles (1a-1k) were prepared by the microwave irradiation. All the compoundswere determined by element analysis,1H NMR, IR and MS. The crystal structures of severalligands were also characterized by X-ray diffraction. The results showed that it belonged toSchiff-base condensation reaction. The mechanism of the reaction was also explored deeply.The reaction between the ligands and late transition metal Co(II), Ni(II) were explored.The coordination of Ni(II) complexes showed the novel ligands could occur complex reactionwithout deprotonating treatment, which had never been reported. The result of X-raydiffraction to three single crystals which were prepared before suggest that the component ofNi(II) complexes are all in accordance with ML2. The loading treatment of complexes andzeolite Beta was studied. The XRD demonstrates the peak intensity in the small angle ofzeolite Beta weakens a lot after the treatment, which means the loading treatment is feasible.