Catalyst for olefin polymerization and process for olefin polymerization

A catalyst for olefin polymerization comprising:

• a solid titanium catalyst component (I) comprising titanium, magnesium, halogen, and a cyclic ester compound (a), which is a cyclohexane-1,2-dicarboxylic acid diester represented by the following formula (1a):
• wherein n is an integer of 6;
• bonds between the carbon atoms in the cyclic backbone are all single bonds;
• a plurality of R1's are each independently a monovalent hydrocarbon group having 1 to 20 carbon atoms;
• a plurality of R's are each independently an atom or group selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group having 1 to 20 carbon atoms, a halogen atom, a nitrogen-containing group, an oxygen-containing group, a phosphorus-containing group, a halogen-containing group and a silicon-containing group, and they may be bonded to each other to form a ring;
• and
• a double bond may be contained in the backbone of the ring foamed by the bonding of R's, and in the case where two Ca's bonded with COOR1 are contained in the backbone of the ring, the backbone of the ring have 5 to 10 carbon atoms,
• said cyclohexane-1,2-dicarboxylic acid diester having a substituent on the 3-position or having substituents on the 3-position and the 6-position, and
• an organometallic compound catalyst component (II) containing a metal element selected from Groups I, II, and XIII of the periodic table, wherein
• the amount of the metal (M-2) (mol) in the organometallic compound catalyst component (II) and the amount of titanium (M-Ti) (mol) in the solid titanium catalyst component (I) satisfies the following relationship:
• 350>(M-2)/(M-Ti)>10.