Hydrogenation catalyst and process for producing olefin polymer

Abstract

The purpose of the present invention is to provide a hydrogenation catalyst, which can produce an olefin polymer having a higher molecular weight, and a process for producing an olefin polymer so that an olefin polymer having a higher molecular weight can be produced, by controlling hydrogen concentration in a polymerization reaction system efficiently in polymerizing an olefin in the presence of hydrogen. There is provided a hydrogenation catalyst formed by contacting the undermentioned component (A), the undermentioned component (B), and the undermentioned component (C). There is further provided a process for producing an olefin polymer characterized by polymerizing an olefin in the presence of hydrogen, the undermentioned component (A), the undermentioned component (B), and the undermentioned component (D). Component (A): a titanocene compound Component (B): a silicon compound represented by the undermentioned general formula [1] Si(OR 1 ) 4   [1] (In the formula, R 1 stands for a hydrocarbon group having 1 to 20 carbon atoms, and four R 1 may be same or different respectively.) Component (C): an alkyl metal compound Component (D): a catalyst for olefin polymerization

1 . A hydrogenation catalyst formed by contacting the undermentioned component (A), the undermentioned component (B), and the undermentioned component (C):
 component (A): a titanocene compound,   component (B): a silicon compound represented by the undermentioned general formula [1]:
   Si(OR 1 ) 4   [1] 
   , wherein R 1  stands for a hydrocarbon group having 1 to 20 carbon atoms, and four R 1  may be same or different respectively, and   component (C): an alkyl metal compound.   
     
     
         2 . A process for producing an olefin polymer characterized by polymerizing an olefin in the presence of hydrogen, the undermentioned component (A), the undermentioned component (B), and the undermentioned component (D):
 component (A): a titanocene compound,   component (B): a silicon compound represented by the undermentioned general formula [1]:
   Si(OR 1 ) 4   [1] 
   , wherein R 1  stands for a hydrocarbon group having 1 to 20 carbon atoms, and four R 1  may be same or different respectively, and   component (D): a catalyst for olefin polymerization.   
     
     
         3 . A process for producing an olefin polymer characterized by polymerizing an olefin in the presence of hydrogen, the undermentioned component (A), the undermentioned component (B), the undermentioned component (C), and the undermentioned component (D):
 component (A): a titanocene compound,   component (B): a silicon compound represented by the undermentioned general formula [1]:
   Si(OR 1 ) 4   [1] 
   , wherein R 1  stands for a hydrocarbon group having 1 to 20 carbon atoms, and four R 1  may be same or different respectively,   component (C): an alkyl metal compound, and   component (D): a catalyst for olefin polymerization.   
     
     
         4 . The process for producing an olefin polymer as set forth in  claim 2 , wherein the component (D) is formed by contacting the undermentioned component (a) and the undermentioned component (b):
 component (a): a solid component containing titanium, magnesium and a halogen, and   component (b): an alkyl aluminum compound.   
     
     
         5 . The process for producing an olefin polymer as set forth in  claim 2 , wherein the component (D) is formed by contacting the undermentioned component (a), the undermentioned component (b), and the undermentioned component (c):
 component (a): a solid component containing titanium, magnesium and a halogen,   component (b): an alkyl aluminum compound, and   component (c): an electron-donating compound.   
     
     
         6 . The process for producing an olefin polymer as set forth in  claim 5 , wherein the component (c) is a silicon compound represented by the undermentioned general formula [2]:
   R 2   r Si(OR 3 ) 4-r   [2]   , wherein R 2  stands for hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, or a hetero atom-containing group, R 3  stands for a hydrocarbon group having 1 to 20 carbon atoms, and r stands for an integer of 0 to 3, and when plural R 2  are present, plural R 2  may be respectively same or different, and when plural R 3  are present, plural R 3  may be respectively same or different.   
     
     
         7 . A process for producing an olefin polymer, which comprises polymerizing an olefin in the presence of hydrogen and the undermentioned component (D), characterized by having a step of adding the undermentioned component (A) into a polymerization reaction system and a step of adding the undermentioned component (B):
 component (A): a titanocene compound,   component (B): a silicon compound represented by the undermentioned general formula [1]:
   Si(OR 1 ) 4   [1] 
   , wherein R 1  stands for a hydrocarbon group having 1 to 20 carbon atoms, and four R 1  may be same or different respectively, and   component (D): a catalyst for olefin polymerization.   
     
     
         8 . A process for producing an olefin polymer, which comprises having two or more olefin polymerization steps different in olefin polymerization conditions and polymerizing an olefin in the presence of hydrogen and the undermentioned component (D), characterized by having a step of adding the undermentioned component (A) and a step of adding the undermentioned component (B) into a polymerization reaction system in the second and subsequent olefin polymerization steps:
 component (A): a titanocene compound,   component (B): a silicon compound represented by the undermentioned general formula [1]:
   Si(OR 1 ) 4   [1] 
   , wherein R 1  stands for a hydrocarbon group having 1 to 20 carbon atoms, and four R 1  may be same or different respectively, and
 component (D): a catalyst for olefin polymerization.