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Volumn 26, Issue 16, 2007, Pages 4010-4014

Chromium catalysts based on tridentate pyrazolyl ligands for ethylene oligomerization

Author keywords

[No Author keywords available]

Indexed keywords

CATALYST SELECTIVITY; CHROMIUM COMPOUNDS; LIGANDS; OLIGOMERIZATION; REACTION KINETICS; X RAY DIFFRACTION;

EID: 34547760276     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om070215i     Document Type: Article
Times cited : (60)

References (35)
  • 26
    • 34547792751 scopus 로고    scopus 로고
    • Blann, K, Bollmann, A, Dixon, J. T, Neveling, A, Morgan, D. H, Maumela, H, Killian, E, Hess, F. M, Otto, S, Pepler, L, Mahomed, H. A, Overett, M. J, Sasol Technology WO 04056479, 2004
    • Blann, K.; Bollmann, A.; Dixon, J. T.; Neveling, A.; Morgan, D. H.; Maumela, H.; Killian, E.; Hess, F. M.; Otto, S.; Pepler, L.; Mahomed, H. A.; Overett, M. J. (Sasol Technology) WO 04056479, 2004.
  • 32
    • 34547733327 scopus 로고    scopus 로고
    • n] all fall in the range 0.5-0.9 [0.64 ± 0.12]. This observed inconsistency of the Schulz-Flory parameters hampers an accurate analysis of the reaction parameters (time, pressure, nature of the complex, ...).
    • n] all fall in the range 0.5-0.9 [0.64 ± 0.12]. This observed inconsistency of the Schulz-Flory parameters hampers an accurate analysis of the reaction parameters (time, pressure, nature of the complex, ...).
  • 33
    • 13644253846 scopus 로고    scopus 로고
    • A six-membered-ring chromium catalyst (1c) was reported to produce 27 wt% of hexenes with a selectivity for 1-hexene of 99%. Bluhm, M. E.; Walter, O.; Döring, M. J. Organomet. Chem. 2005, 690, 713.
    • A six-membered-ring chromium catalyst (1c) was reported to produce 27 wt% of hexenes with a selectivity for 1-hexene of 99%. Bluhm, M. E.; Walter, O.; Döring, M. J. Organomet. Chem. 2005, 690, 713.
  • 34
    • 34547762088 scopus 로고    scopus 로고
    • Considering the poor solubility of complex 3 in toluene, a preactivation procedure was attempted to possibly generate higher amounts of active species. Thus, complex 3 was first dissolved and preactivated in a MAO/toluene solution under ethylene atmosphere (1 bar) for 10 min, and then oligomerization was carried out under 20 bar. However, we observed that this procedure led to lower TOF values 13 700 h-1; compare entries 2 and 5, suggesting that catalyst deactivation takes place
    • -1; compare entries 2 and 5), suggesting that catalyst deactivation takes place.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.