Metalated ligand, catalyst composition, and use thereof in the oligomerization of ethylene
AssigneeSaudi Basic Industries Corporation
InventorsAbdullah Mohammad Al-Qahtani, Mohammed H. Al-Hazmi, Uwe Rosenthal, Bernd H. Müller, Normen Peulecke, Marco Harff, Anina Wöhl, Andreas Meiswinkel, Heinz Bölt, Wolfgang Müller
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Abstract
A process for oligomerization of ethylene, comprising subjecting a catalyst composition to a gas phase of ethylene and conducting an oligomerization, wherein the catalyst composition comprises (a) a chromium compound, (b) a metalated ligand, and (c) an activator or cocatalyst; and catalyst composition as well as a metalated ligand.
Claims15
A process for oligomerization of ethylene, comprising contacting a catalyst composition with a gas phase of ethylene under conditions effective to oligomerize the ethylene, wherein the catalyst composition comprises
- (a) a chromium compound,
- (b) a metalated PNPNH compound, wherein the PNPNH compound is of the formula
- R1R2P—N(R3)—P(R4)—N(R5)—H
- wherein R1, R2, R3, R4 and R5 are independently selected from halogen, amino, trimethylsilyl, C1-C10-alkyl, substituted C1-C10-alkyl, C6-C20-aryl and substituted C6-C20-aryl, or any cyclic derivative wherein at least one of the P or N atoms of the PNPN—H structure is a member of a ring system, the ring system being formed from one or more constituent compounds of the PNPNH-structure by substitution, and
- (c) an activator or cocatalyst.
A catalyst composition for oligomerization of ethylene comprising
- (a) a chromium compound,
- (b) a metalated PNPNH compound, wherein the PNPNH compound is of the formula
- R1R2P—N(R3)—P(R4)—N(R5)—H
- wherein R1, R2, R3, R4 and R5 are independently selected from halogen, amino, trimethylsilyl, C1-C10-alkyl, substituted C1-C10-alkyl, C6-C20-aryl and substituted C6-C20-aryl, or any cyclic derivative wherein at least one of the P or N atoms is a member of a ring system, the ring system being formed from two constituents of the PNPNH compound by substitution, and
- (c) an activator or cocatalyst.
A method for metalating a compound of the general formula
- R1R2P—N(R3)—P(R4)—N(R5)—H
- wherein R1, R2, R3, R4 and R5 are independently selected from halogen, amino, trimethylsilyl, C1-C10-alkyl, substituted C1-C10-alkyl, C6-C20-aryl and substituted C6-C20-aryl, or any cyclic derivative wherein at least one of the P or N atoms of the PNPN—H structure is a member of a ring system, the ring system being formed from one or more constituent compounds of the PNPNH-structure by substitution, the method comprising the steps of:
- (i) dissolving the PNPNH compound in a solvent to obtain a solution;
- (ii) metalating the PNPNH compound in the solution, and
- (iii) precipitating the metalated compound, separating from the solvent and optionally washing with the solvent.
Dependencies are inferred from the claim text.