Patent ID: 11911749
Assignee: SK INNOVATION CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 8:
9. An ethylene oligomerization catalyst comprising: a chromium catalyst precursor represented by the following Chemical Formula 1 and a heteroatom ligand represented by the following Chemical Formula 3:

[CrM1(L)x(R)6-x]n(W)m  [Chemical Formula 1]

wherein
M1 is a Group 13 element;
L is a ligand in a β-keto enolate form;
R is a halogen, C1-C10 alkoxy, or C6-C20 aryloxy;
W is a neutral coordination ligand;
n is an integer of 1 or 2;
x is an integer of 1 to 6; and
m is an integer of 2 to 4

(R12)(R11)P—Y—Z  [Chemical Formula 3]

wherein
R11 and R12 are independently of each other hydrocarbyl, heterohydrocarbyl, substituted hydrocarbyl, or substituted heterohydrocarbyl;
Y is a linking group between P and Z;
Z is *—P(R13)(R14) or, ring A and ring B are independently of each other an aromatic ring;
L1 and L2 are independently of each other a single bond, a heteroatom, a substituted heteroatom, —C(═O)—, or —CR′R″—;
R′ and R″ are independently of each other hydrogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl, or substituted heterohydrocarbyl;
R13 to R16 are independently of one another hydrocarbyl, heterohydrocarbyl, substituted hydrocarbyl, or substituted heterohydrocarbyl; and
c and d are independently of each other an integer of 0 to 4.