Magnesium compound, solid catalyst component, olefin polymerization catalyst, and method for producing polyolefin

Abstract

A magnesium compound represented by the formula (I) which is obtained by reacting metal magnesium, ethanol, methanol and a halogen and/or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium Mg(OEt) 2-n (OMe) n   (I) where Et is an ethyl group, Me is a methyl group and n is a numerical value of from 0.001 to 1.

1 . A magnesium compound represented by the formula (I) which is obtained by reacting metal magnesium, ethanol, methanol and a halogen and/or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium 
         Mg(OEt) 2-n (OMe) n   (I) 
       where Et is an ethyl group, Me is a methyl group and n is a numerical value of from 0.001 to 1.  
     
     
         2 . The magnesium compound according to  claim 1 , which has an average particle diameter D 50  from 4 to 20 μm and a particle size distribution index (P) represented by the formula (1) of P<4.0 
           P =( D   90   /D   10 ,  (1) 
       where D 90  is a particle diameter corresponding to 90% of cumulative weight fraction, and D 10  is a particle diameter corresponding to 10% of cumulative weight fraction.  
     
     
         3 . The magnesium compound according to  claim 1 , wherein the halogen is iodine.  
     
     
         4 . The magnesium compound according to  claim 1 , wherein the halogen-containing on pound is magnesium dichloride.  
     
     
         5 . The magnesium compound according to  claim 1 , wherein n of the formula (I) is a numerical value of from 0.01 to 0.2.  
     
     
         6 . A solid catalyst component obtained by reacting the following components (a) and (b): 
 (a) the magnesium compound according to  claim 1     (b) a titanium compound represented by the formula (II)     Ti(OR) q X 4-q   (II)    where X is a halogen atom, R is a hydrocarbon group having from 1 to 10 carbon atoms, q is an integer of from 0 to 4, and a plurality of R's are the same as or different from each other when q is 2 or more.    
     
     
         7 . The solid catalyst component according to  claim 6  obtained by reacting a halogen compound (c) and/or an electron donating compound (d) in addition to the components (a) and (b).  
     
     
         8 . The solid catalyst component according to  claim 6  obtained by reacting a halogen compound(c) and/or an alcohol (e) in addition to the components (a) and (b).  
     
     
         9 . The solid catalyst component according to  claim 7 , wherein the halogen compound (c) is silicon tetrachloride.  
     
     
         10 . The solid catalyst component or ethylene polymerization according to  claim 8 , wherein the alcohol (e) is isopropanol.  
     
     
         11 . A catalyst for olefin polymerization comprising the following components (A) and (B): 
 (A) the solid catalyst component according to  claim 1     (B) an organometallic compound.    
     
     
         12 . The catalyst for olefin polymerization according to  claim 11  further comprising an electron donating compound (C).  
     
     
         13 . A method of producing a polyolefin using the catalyst for olden polymerization according to  claim 11.