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.

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 stre con 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 prior to m

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 method for reaction control of an exothermic reaction, comprising the steps: i) carrying out an exothermic reaction in a reactor to produce product, ii) measuring temperature and/or pressure in the reactor, and iii) introducing inert product already produced previously in the exothermic reaction from a storage container into the reactor, if temperature and/or pressure exceed(s) critical value(s). as well as an apparatus for carrying out an exothermic reaction.

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: 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.