Abstract: A solid cocatalyst for olefin polymerization in which an ion-containing compound comprising a cation expressed by [R4M]+, wherein the group R are each individually selected from the group consisting of hydrogen atom and a substituted or non-substituted hydrocarbon group having from 1 to 30 carbon atoms with the exception of an aryl group; two or more groups R may form a ring by bonding with one another; at least one of the groups R is a hydrocarbon group having from 1 to 30 carbon atoms with the exception of an aryl group; and M represents nitrogen or sulfur, and a non-coordinating anion expressed by [A] said ion-containing compound is chemically bonded to a fine particulate carrier is used.

Abstract: A catalyst is used which comprises a cocatalyst component wherein a non-coordinating ion-containing compound is chemically bonded to a fine particulate carrier, together with a metallocene compound and a specific hydrocarbon. There are provided an olefin polymerization catalyst which produces olefin polymers containing few solvent-soluble components without a wider molecular weight distribution, and which exhibits no significant reduction in activity even after storage, as well as olefin polymerization catalyst components and a method for their storage, and a process for production of propylene polymers using them.

Abstract: A solid cocatalyst for olefin polymerization in which an ion-containing compound comprising a cation expressed by [R4M]+, wherein the group R are each individually selected from the group consisting of hydrogen atom and a substituted or non-substituted hydrocarbon group having from 1 to 30 carbon atoms with the exception of an aryl group; two or more groups R may form a ring by bonding with one another; at least one of the groups R is a hydrocarbon group having from 1 to 30 carbon atoms with the exception of an aryl group; and M represents nitrogen or sulfur, and a non-coordinating anion expressed by [A] said ion-containing compound is chemically bonded to a fine particulate carrier is used.

Abstract: A catalyst is used which comprises a cocatalyst component wherein a non-coordinating ion-containing compound is chemically bonded to a fine particulate carrier, together with a metallocene compound and a specific hydrocarbon. There are provided an olefin polymerization catalyst which produces olefin polymers containing few solvent-soluble components without a wider molecular weight distribution, and which exhibits no significant reduction in activity even after storage, as well as olefin polymerization catalyst components and a method for their storage, and a process for production of propylene polymers using them.

Abstract: Ionic compounds represented by general formula (I), method of their production, olefin polymerization catalyst components, and olefin polymerization catalysts containing the components are provided.?M(R.sup.1).sub.k (R.sup.2).sub.1 (R.sup.3).sub.m (R.sup.4 -L).sub.n !.sup.- ?D!.sup.+ (I)(wherein, M is an element belonging to the Group 13; R.sup.1, R.sup.2 and R.sup.3 are pentafluorophenyl, etc., R.sup.4 is a substituted phenylene group, etc., k, l and m being each 0 or an integer of 1 to 3, and n being an integer of 1 to 4 such that k+l+m+n=4; L is trichlorosilyl, methyldichlorosilyl, dimethylchlorosilyl group, etc.; and D is a monovalent cation).