Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure (A) R1R2P—N(R3)—P(R4)—NR5R6 or (B) R1R2P—N(R3)—P(XR7)R8 or R1R2P—N(R3)—P(XR7)2, with X?O or S, wherein R1, R2, R3, R4, R5, R6, R7 and R8 are independently C1-C10-alkyl, C6-C20-aryl, C3-C10-cycloalkyl, aralkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of (A) and (B), wherein at least one of the P or N atoms of the PNPN-unit or PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of structures (A) or (B) by substitution; and (c) an activator or co-catalyst; and a process for tri- and/or tetramerization.

Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure R1R2P—N(R3)—P(XR7)2, wherein X is O or S, R1, R2, and R3 are each independently C1-C10-alkyl, C6-C20-cycloalkyl, arylalkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of the ligand, wherein at least one of the P or N atoms of the PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of the ligand by substitution, and R7 is C1-C10-alkyl, C3-C10-cycloalkyl, arylalkyl, or trialkylsilyl; and (c) an activator or co-catalyst.

Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure R1R2P—N(R3)—P(R4)—NR5R6 or??(A) R1R2P—N(R3)—P(XR7)R8 or R1R2P—N(R3)—P(XR7)2, with X?O or S,??(B) wherein R1, R2, R3, R4, R5, R6, R7 and R8 are independently C1-C10-alkyl, C6-C20-aryl, C3-C10-cycloalkyl, aralkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of (A) and (B), wherein at least one of the P or N atoms of the PNPN-unit or PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of structures (A) or (B) by substitution; and (c) an activator or co-catalyst; and a process for tri- and/or tetramerization.

Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure R1R2P—N(R3)—P(R4)—NR5R6 or??(A) R1R2P—N(R3)—P(XR7)R8 or R1R2P—N(R3)—P(XR7)2, with X=O or S,??(B) wherein R1, R2, R3, R4, R5, R6, R7 and R8 are independently C1-C10-alkyl, C6-C20-aryl, C3-C10-cycloalkyl, aralkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of (A) and (B), wherein at least one of the P or N atoms of the PNPN-unit or PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of structures (A) or (B) by substitution; and (c) an activator or co-catalyst; and a process for tri- and/or tetramerization.

Abstract: The present invention relates to a method for preparing linear alpha-olefins (LAO) by oligomerization of ethylene in the presence of solvent and homogenous catalyst, comprising the steps of: (i) feeding ethylene, solvent and catalyst into an oligomerization reactor, (ii) oligomerizing the ethylene in the reactor, (iii) removing a reactor outlet stream comprising solvent, linear alpha-olefins, ethylene, and catalyst from the reactor via a reactor outlet piping system, (iv) transferring the reactor outlet stream to a catalyst deactivation and removal step, and (v) deactivating and removing the catalyst from the reactor outlet stream, characterized in that at least one organic amine is added into the oligomerization reactor and/or into the reactor outlet piping system.

Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure (A) R1R2P—N(R3)—P(R4)—NR5R6 or (B) R1R2P—N(R3)—P(XR7)R8 or R1R2P—N(R3)—P(XR7)2, with X=O or S, wherein R1, R2, R3, R4, R5, R6, R7 and R8 are independently C1-C10-alkyl, C6-C20-aryl, C3-C10-cycloalkyl, aralkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of (A) and (B), wherein at least one of the P or N atoms of the PNPN-unit or PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of structures (A) or (B) by substitution; and (c) an activator or co-catalyst; and a process for tri- and/or tetramerization.

Abstract: A catalyst composition and a process for di-, tri- and/or tetramerization of ethylene, wherein the catalyst composition comprises a chromium compound, a ligand of the general structure R1R2P—N(R3)—P(R4)—N(R5)—PR6R7, or any cyclic derivatives thereof, wherein at least one of the P or N atoms of the PNPNP-unit is member of a ring system, the ring system being formed from one or more constituent compounds of the ligand by substitution, and a co-catalyst or activator.

Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure (A) R1R2P—N(R3)—P(R4)—NR5R6 or (B) R1R2P—N(R3)—P(XR7)R8 or R1R2P—N(R3)—P(XR7)2, with X=O or S, wherein R1, R2, R3, R4, R5, R6, R7 and R8 are independently C1-C10-alkyl, C6-C20-aryl, C3-C10-cycloalkyl, aralkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of (A) and (B), wherein at least one of the P or N atoms of the PNPN-unit or PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of structures (A) or (B) by substitution; and (c) an activator or co-catalyst; and a process for tri- and/or tetramerization.

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.

Abstract: The present invention relates to a method for purifying a crude PNPNH compound by metalation and re-protonation.

Abstract: A method for purifying a crude PNPNH compound of the general structure R1R2P—N(R3)—P(R4)—N(R5)—H wherein R1, R2, R3, R4 and R5 are independently 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: A. a) dissolving the crude PNPNH-compound in a C1-C10 alcohol or mixture thereof under heating; b) cooling the solution obtained in step a), c) precipitating the PNPNH compound, separating and optionally drying, or B. (i) washing the crude PNPNH compound with C1-C10 alcohol or a mixture thereof, (ii) separating the PNPNH compound and optionally drying thereof.

Abstract: The present invention relates to a catalyst composition for oligomerization of ethylene, comprising a chromium compound; a ligand of the general structure 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, aryl and substituted aryl; a modifier containing organic or inorganic halide; and an activator or co-catalyst; and a process for oligomerization utilizing that catalyst.

Abstract: The present invention relates to a method for preparing linear alpha-olefins (LAO) by oligomerization of ethylene in the presence of a solvent and homogeneous catalyst, comprising the steps of: (i) feeding ethylene, solvent and catalyst into an oligomerization reactor, (ii) oligomerizing the ethylene in the reactor, (iii) removing a reactor outlet stream comprising solvent, linear alpha-olefins, optionally unreacted ethylene and catalyst from the reactor via a reactor outlet piping system, (iv) dosing at least one additive selected from the group consisting of alcohols, poly-ethylene glycols, polyethylene glycol monoethers, polyethylene glycol diethers, polyamines, amines, amino alcohols and surfactants, (v) transferring the reactor outlet stream containing the additive to a catalyst deactivation and removal section, and (vi) deactivating the catalyst with caustic and removing the deactivated catalyst from the reactor outlet stream, wherein the residence time of the additive in the reactor outlet stream pri

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.

Abstract: A method for purifying a crude PNPNH compound of the general structure R1R2P—N(R3)—P(R4)—N(R5)—H wherein R1, R2, R3, R4 and R5 are independently 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: A. a) dissolving the crude PNPNH-compound in a C1-C10 alcohol or mixture thereof under heating; b) cooling the solution obtained in step a), c) precipitating the PNPNH compound, separating and optionally drying, or B. (i) washing the crude PNPNH compound with C1-C10 alcohol or a mixture thereof, (ii) separating the PNPNH compound and optionally drying thereof.

Abstract: The present invention relates to a method for purifying a crude PNPNH compound by metalation and re-protonation.

Abstract: The present invention relates to a catalyst composition comprising: (a) a binuclear chromium(II) complex; (b) a ligand of the general structure (A) R1R2P—N(R3)—P(R4)—N(R5)—H or (B) R1R2P—N(R3)—P(R4)—N(R5)—PR6R7, wherein R1, R2, R3, R4, R5, R6 and R7 are independently selected from halogen, amino, trimethylsilyl, C1-C10-alkyl, aryl and substituted aryl, wherein the PNPN- or PNPNP-unit is optionally part of a ring system; and (c) an activator or co-catalyst, as well as to a process for oligomerization of ethylene.

Abstract: A catalyst composition and a process for di-, tri- and/or tetramerization of ethylene, wherein the catalyst composition comprises a chromium compound, a ligand of the general structure R1R2P—N(R3)—P(R4)—N(R5)—PR6R7, or any cyclic derivatives thereof, wherein at least one of the P or N atoms of the PNPNP-unit is member of a ring system, the ring system being formed from one or more constituent compounds of the ligand by substitution, and a co-catalyst or activator.

Abstract: The present invention relates to a catalyst composition and a process for di-, tri- and/or tetramerization of ethylene, wherein the catalyst composition comprises a chromium compound, a ligand of the general structure (A) R1R2P—N(R3)—P(R4)—N(R5)—H or (B) R1R2P—N(R3)—P(R4)—N(R5)—PR6R7, or any cyclic derivatives of (A) and (B), wherein at least one of the P or N atoms of the PNPN-unit or PNPNP-unit is member of a ring system, the ring system being formed from one or more constituent compounds of structures (A) or (B) by substitution and a co-catalyst or activator.

Abstract: The present invention relates to a catalyst for oligomerization of ethylene, comprising a functionalized solid support; a ligand immobilized on the solid support by chemical bonding, wherein the immobilized ligand has the structure (R1)(R2)P—N(R3)—P(R4)—Y-support or (R1)(R2)P—N(R3)—P(R4)—N(R5)—P(R6)—Y-support, wherein R1, R2, R3, R4, R5 and R6 are independently selected from aliphatic group, aryl group, amino group and trimethylsilyl group and Y is the functional group of the support or a derivative thereof; and a chromium compound reacted with the ligand; and to a method for its preparation and a process for oligomerization of ethylene utilizing the catalyst.