Comparative study of new chromium-based catalysts for the selective tri- and tetramerization of ethylene

Stefan Härzschel; Fritz E. Kühn; Anina Wöhl; Wolfgang Müller; Mohammed H. Al-Hazmi; Abdullah M. Alqahtani; Bernd H. Müller; Normen Peulecke; Uwe Rosenthal

doi:10.1039/c4cy01441c

Comparative study of new chromium-based catalysts for the selective tri- and tetramerization of ethylene

Stefan Härzschel, Fritz E. Kühn, Anina Wöhl, Wolfgang Müller, Mohammed H. Al-Hazmi, Abdullah M. Alqahtani, Bernd H. Müller, Normen Peulecke, Uwe Rosenthal

Professur für Molekulare Katalyse

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

40 Zitate (Scopus)

Abstract

Two new ligands, Ph₂PN(iPr)P(Ph)N(c-Hex)(CH₃) (2) (Ph = phenyl, iPr = isopropyl, c-Hex = cyclohexyl) and Ph₂PN(c-Hex)P(Ph)NEt(CH₃) (Et = ethyl) (3) were synthesized. 2 was characterized by X-ray analysis. To compare their applicability with the previously known Ph₂PN(iPr)P(Ph)N(iPr)H (1) these ligands were investigated together with chromium(iii)acetylacetonate, different co-catalysts and solvents for the catalytic oligomerization of ethylene. The in situ prepared catalysts proved to be highly active, yielding highly pure 1-octene as the main product and 1-hexene as the main byproduct. It was possible to reach productivities of several hundred kg product per gram chromium and hour, up to almost 65 wt% 1-octene with about 99% purity and overall 1-hexene plus 1-octene yields of more than 85 wt%.

Originalsprache	Englisch
Seiten (von - bis)	1678-1682
Seitenumfang	5
Fachzeitschrift	Catalysis Science and Technology
Jahrgang	5
Ausgabenummer	3
DOIs	https://doi.org/10.1039/c4cy01441c
Publikationsstatus	Veröffentlicht - 1 März 2015

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title = "Comparative study of new chromium-based catalysts for the selective tri- and tetramerization of ethylene",

abstract = "Two new ligands, Ph2PN(iPr)P(Ph)N(c-Hex)(CH3) (2) (Ph = phenyl, iPr = isopropyl, c-Hex = cyclohexyl) and Ph2PN(c-Hex)P(Ph)NEt(CH3) (Et = ethyl) (3) were synthesized. 2 was characterized by X-ray analysis. To compare their applicability with the previously known Ph2PN(iPr)P(Ph)N(iPr)H (1) these ligands were investigated together with chromium(iii)acetylacetonate, different co-catalysts and solvents for the catalytic oligomerization of ethylene. The in situ prepared catalysts proved to be highly active, yielding highly pure 1-octene as the main product and 1-hexene as the main byproduct. It was possible to reach productivities of several hundred kg product per gram chromium and hour, up to almost 65 wt% 1-octene with about 99% purity and overall 1-hexene plus 1-octene yields of more than 85 wt%.",

author = "Stefan H{\"a}rzschel and K{\"u}hn, {Fritz E.} and Anina W{\"o}hl and Wolfgang M{\"u}ller and Al-Hazmi, {Mohammed H.} and Alqahtani, {Abdullah M.} and M{\"u}ller, {Bernd H.} and Normen Peulecke and Uwe Rosenthal",

note = "Publisher Copyright: {\textcopyright} 2015 The Royal Society of Chemistry.",

year = "2015",

month = mar,

day = "1",

doi = "10.1039/c4cy01441c",

language = "English",

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AU - Härzschel, Stefan

AU - Kühn, Fritz E.

AU - Wöhl, Anina

AU - Müller, Wolfgang

AU - Al-Hazmi, Mohammed H.

AU - Alqahtani, Abdullah M.

AU - Müller, Bernd H.

AU - Peulecke, Normen

AU - Rosenthal, Uwe

PY - 2015/3/1

Y1 - 2015/3/1

N2 - Two new ligands, Ph2PN(iPr)P(Ph)N(c-Hex)(CH3) (2) (Ph = phenyl, iPr = isopropyl, c-Hex = cyclohexyl) and Ph2PN(c-Hex)P(Ph)NEt(CH3) (Et = ethyl) (3) were synthesized. 2 was characterized by X-ray analysis. To compare their applicability with the previously known Ph2PN(iPr)P(Ph)N(iPr)H (1) these ligands were investigated together with chromium(iii)acetylacetonate, different co-catalysts and solvents for the catalytic oligomerization of ethylene. The in situ prepared catalysts proved to be highly active, yielding highly pure 1-octene as the main product and 1-hexene as the main byproduct. It was possible to reach productivities of several hundred kg product per gram chromium and hour, up to almost 65 wt% 1-octene with about 99% purity and overall 1-hexene plus 1-octene yields of more than 85 wt%.

AB - Two new ligands, Ph2PN(iPr)P(Ph)N(c-Hex)(CH3) (2) (Ph = phenyl, iPr = isopropyl, c-Hex = cyclohexyl) and Ph2PN(c-Hex)P(Ph)NEt(CH3) (Et = ethyl) (3) were synthesized. 2 was characterized by X-ray analysis. To compare their applicability with the previously known Ph2PN(iPr)P(Ph)N(iPr)H (1) these ligands were investigated together with chromium(iii)acetylacetonate, different co-catalysts and solvents for the catalytic oligomerization of ethylene. The in situ prepared catalysts proved to be highly active, yielding highly pure 1-octene as the main product and 1-hexene as the main byproduct. It was possible to reach productivities of several hundred kg product per gram chromium and hour, up to almost 65 wt% 1-octene with about 99% purity and overall 1-hexene plus 1-octene yields of more than 85 wt%.

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Comparative study of new chromium-based catalysts for the selective tri- and tetramerization of ethylene

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