Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts

Bastero A; Francio G; Leitner W; Mecking S

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Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts

机译：与可溶性镍（II）催化剂在二氧化碳中作为反应介质的催化乙烯聚合

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A series of neutral Ni-II-salicylaldiminato complexes substituted with perfluorooctyl- and trifluoromethyl groups, [Ni{kappa(2)-N, O-6-C(H)=NAr-2,4R'2C6H2O}(Me)(pyridine)] (6a: Ar= 2,6-{4-(F17C8)C6H4}(2)C6H3, R' =I; 6b: Ar = 2,6-{4-(F3C)C6H4}(2)C6H3, R'= I; 6c: Ar = 2,6-{3,5-(F3C)(2)C6H3}(2)C6H3, R'=3,5-(F3C)(2)C6H3; 6d: Ar=2,6-{4-(F17C8)C6H4}(2)C6H3, R'= 3,5-(F3C)(2)C6H3; 6e: Ar=2,6-{3,5-(F3C)(2)C6H3}(2)-C6H3, R'=I) were studied as catalyst precursors for ethylene polymerisation in supercritical CO2. Catalyst precursors 6a and 6c, which are soluble in scCO(2), afford the highest polymer yields, corresponding to 2x 10(3) turnovers. Semicrystalline polyethylene (M-n typically 10(4) g mol(-1)) is obtained with variable degrees of branching (11 to 24 branches per 1000 carbon atoms, predominantly Me branches) and crystallinities (54 to 21%), depending on the substitution pattern of the catalyst.

机译：一系列被全氟辛基和三氟甲基取代的中性Ni-II-水杨醛二氨基络合物，[Ni {kappa（2）-N，O-6-C（H）= NAr-2,4R'2C6H2O}（Me）（吡啶）]（6a：Ar = 2,6- {4-（F17C8）C6H4}（2）C6H3，R'= I; 6b：Ar = 2,6- {4-（F3C）C6H4}（2）C6H3， R′＝ 1; 6c：Ar ＝ 2，6- {3，5-（F3C）（2）C6H3}（2）C6H3，R′＝ 3，5-（F3C）（2）C6H3; 6d：Ar ＝ 2,6- {4-（F17C8）C6H4}（2）C6H3，R'= 3,5-（F3C）（2）C6H3; 6e：Ar = 2,6- {3,5-（F3C）（2 ）C 6 H 3}（2）-C6H3，R'＝ I）被研究为在超临界CO 2中乙烯聚合的催化剂前体。可溶于scCO（2）的催化剂前体6a和6c提供最高的聚合物收率，相当于2x 10（3）的周转率。获得半结晶聚乙烯（Mn通常为10（4）g mol（-1），具有可变的支化度（每1000个碳原子11至24个支化，主要是Me支化）和结晶度（54至21％），具体取决于取代催化剂的图案。

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《Chemistry: A European journal》 |2006年第23期|共7页
作者
Bastero A; Francio G; Leitner W; Mecking S;
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正文语种 eng
中图分类化学;
关键词
carbon dioxide; fluorinated ligands; homogeneous catalysis; nickel; polyethylene; polymerization; EMULSION POLYMERIZATION; OLEFIN METATHESIS; ALPHA-OLEFINS; COMPLEXES; COPOLYMERIZATION; LIGANDS; PROPYLENE; PARTICLES; ACRYLATE; WATER;

机译：二氧化碳;氟化配体;均相催化;镍;聚乙烯;聚合;乳液聚合;烯烃复分解;α-烯烃;络合物;共聚合;液体;丙烯;颗粒;丙烯酸;废水;

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4. A comparative study on catalytic performances of chromium incorporated and supported mesoporous MSU-x catalysts for the oxidehydrogenation of ethane to ethylene with carbon dioxide [C] . Licheng Liu, Huiquan Li, Yi Zhang International Conference on Carbon Dioxide Utilization . 2006

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6. Catalytic conversion of carbon dioxide into dimethyl carbonate using reduced copper-cerium oxide catalysts as low as 353 K and 1.3 MPa and the reaction mechanism [O] . Seiki Wada, Kazuki Oka, Kentaro Watanabe, 2013

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7. Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts [O] . Bastero, Amaia, Franciò, Giancarlo, Leitner, Walter, 2006

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8. Fundamental studies of the mechanism of catalytic reactions with catalysts effective in the gasification of carbon solids and the oxidative coupling of methane. Quarterly report, January 1, 1995--March 31, 1995 [R] . Iglesia, E. , Perry, D. L. , Heinemann, H. 1995

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Catalytic ethylene polymerisation in carbon dioxide as a reaction medium with soluble nickel(II) catalysts

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