▎ 摘　　要

NOVELTY - A catalyst comprises a carbon material (A), at least one component (B), and (C) transition metal compound (I). The component (B) is chosen from (B-1) an organoaluminum oxy compound and (B-II) a compound that reacts with the transition metal compound (C) to form an ion pair. The component (A) has a molar ratio of oxygen with respect to carbon of 0.018-0.400 in X-ray photoelectron spectroscopy and a specific surface area of 100-5000 m/g by BET multipoint method. USE - Catalyst used for polymerizing for preparing olefin polymer (claimed). Uses include but are not limited to ethylene homopolymer, propylene homopolymer, 4-methyl-1-pentene homopolymer, ethylene/propylene copolymer, ethylene/1-butene copolymer, ethylene/1-hexene copolymer, ethylene/1-octene copolymer, 4-methyl-1-pentene copolymer, propylene/4-methyl-1-pentene copolymer, and 4-methyl-1-pentene/1-decene copolymer. ADVANTAGE - The catalyst has high polymerization activity, and improved the dispersibility of the carbon material in polyolefin. DETAILED DESCRIPTION - A catalyst comprises a carbon material (A), at least one component (B), and (C) transition metal compound of formula: LmMXn (I). The component (B) is chosen from (B-1) an organoaluminumoxy compound and (B-II) a compound that reacts with the transition metal compound (C) to form an ion pair. The component (A) has a molar ratio of oxygen with respect to carbon of 0.018-0.400 in X-ray photoelectron spectroscopy and a specific surface area of 100-5000 m/g by BET multipoint method. M = group 3-11 atoms, or lanthanide atom; L = eta -bonded cyclic anionic ligand, sigma -bonded anionic ligands, or pi -bonded neutral ligands; m = 0 or more; n = 1-6;and X = H, halo, hydrocarbyl, halo-containing group, silicon-containing group, oxygen-containing group, sulfur-containing group, nitrogen-containing group, phosphorus-containing group, or diene derivative group. (i) When n is 2 or more, X can be combine with each other to form a ring. An INDEPENDENT CLAIM is included for production of olefin polymer, which involves (s1) polymerizing an olefin in the presence of the catalyst.