摘要:
Provided are a chromium catalyst precursor, an ethylene oligomerization catalyst including the same, and a method of preparing an ethylene oligomer using the same. More particularly, a chromium catalyst precursor which may oligomerize ethylene with high activity and high selectivity in spite of not using methylaluminoxane (MAO) or modified-methylaluminoxane (MMAO), an oligomerization catalyst including the same, and a method of preparing an ethylene oligomer using the same are provided.
摘要:
Disclosed herein is a method of preparing 1-octene at high activity and high selectivity while stably maintaining reaction activity by tetramerizing ethylene using a chromium-based catalyst system comprising a transition metal or a transition metal precursor, a cocatalyst, and a P—C—C—P backbone structure ligand represented by (R1)(R2)P—(R5)CHCH(R6)—P(R3)(R4).
摘要:
The present application relates to N2-phosphinyl guanidine metal salt complexes. The present application also relates to catalyst systems comprising N2-phosphinyl guanidine metal salt complexes and processes for making catalyst systems comprising N2-phosphinyl guanidine metal salt complexes. The present application also relates to utilizing N2-phosphinyl guanidine metal salt complexes in processes of oligomerizing or polymerizing olefins.
摘要:
A catalytic composition comprising at least one nickel compound mixed or complexed with at least one tertiary phosphine or a phosphite carrying a functional group, at least partly dissolved in a non-aqueous medium with an ionic nature resulting from bringing at least one aluminum halide into contact with at least one quaternary ammonium halide and/or at least one quaternary phosphonium halide, is useful for dimerizing, co-dimerizing and oligomerizing olefins. Functional groups include, but are not limited to, an amine, a cyclic amine, a nitrogen-containing heterocycle, an ester, an acid, an alcohol, a quaternary ammonium, a quaternary phosphonium, a sulfonium, a sulfonate or a phosphonate group.
摘要:
A catalytic composition comprising at least one nickel compound mixed or complexed with at least one tertiary phosphine or a phosphite carrying a functional group, at least partly dissolved in a non-aqueous medium with an ionic nature resulting from bringing at least one aluminum halide into contact with at least one quaternary ammonium halide and/or at least one quaternary phosphonium halide is useful for dimerizing, co-dimerizing and oligomerizing olefins. Functional group include, but are not limited to, an amine, a cyclic amine, a nitrogen-containing heterocycle, an ester, an acid, an alcohol, a quaternary ammonium, a quaternary phosphonium, a sulfonium, a sulfonate or a phosphonate group.
摘要:
A composition defined: either as comprising at least one Broensted acid, designated HB, dissolved in a liquid medium with an ionic nature of general formula QnullAnull, in which Qnull represents an organic cation and Anull represents an anion that is different from B, or as resulting from dissolving at least one Broensted acid, designated HB, in a non-aqueous liquid medium with an ionic nature of general formula QnullAnull, in which Qnull represents an organic cation and Anull represents an anion that is identical to the anion B, can be used as a catalyst and solvent in acid catalysis processes, in particular in the alkylation of aromatic hydrocarbons, the oligomerization of olefins, the dimerization of isobutene, the alkylation of olefins by isoparaffins, the isomerization of n-paraffins into isoparaffins, the isomerization of n-olefins into iso-olefins, the isomerization of the double bond of an olefin and the purification of an olefin mixture that contains branched alpha olefins as impurities.
摘要:
Linear alpha-olefin formation via oligomerization of ethylene using transition metal catalysis leads to a Schultz-Flory distribution of oligomers. At modest temperatures formation of heavy oligomers which are waxy solids only partly soluble in the LAO product mix causes reactor plugging and curtailing the time of continuous runs. Recycling a portion of a lighter oligomeric fraction obviates this problem and permits runs uninterrupted by solids formation.
摘要:
A process for the preparation of dimerization products from aliphatic mono-olefins having 2 to about 12 carbon atoms in which the aliphatic mono-olefin is contacted with a catalytic system formed by combining a palladium and/or ruthenium compound and an acid with a pKa of less than 2, except hydrohalogenic acids in an aprotic organic solvent.
摘要:
This invention is a process for the selective conversion of propylene and the n-butylenes to their dimers, in the presence of a heterogeneous palladium cyanide catalyst. The product dimers are predominantly of straight-chain structure.
摘要:
1. A PROCESS FOR THE CNTROLLED POLYMERIZATION OF LINEAR ALPHA OLEFINES CONTAINING FROM 6 TO 12 CARBON ATOMS INTO POLYMER OILS CONTAINING HIGH PERCENTAGES OF TRIMERIC ANC TETRAMERIC PRODUCTS POSSESSING LOW POUR POINTS, LOW VISCOSITIES, HIGH VISCOSITY INDEXES, AND HIGH FLASH POINTS, SAID PRODUCTS BEING SUITABLE FOR THE FORMULATION OF LIGHT LUBRICATING OILS AND HYDRAULIC FLUIDS, SAID PROCESS COMPRISING THE FOLLOWING STEPS: (A) REACTING A LINEAR ALPHA OLEFIN OF 6 TO 12 CARBON ATOMS AT A TEMPERATURE BETWEEN 180* AND 250*F., WITH A CATALYST COMPRISING A MIXTURE OF ANHYDROUS ALUMINUM CHLORIDE WITH A MONONITROALKANE HAVING ONE TO THREE CARBON ATOMS IN A RATIO OF 1 YO 6 MOLS OF MONONITROALKANE TO EACH MOL OF ALUMINUM CHLORIDE, AND (B) REMOVING CATALYST FROM THE POLYMER OIL PRODUCT AND FRACTIONATING THE OIL TO RECOVER THEREFROM AN OIL FRACTION COMPOSED OF THE DESIRED POLYMERS OF THE ALPHA OLEFINE STARTING MATERIAL.