| 摘要 |
The present invention is capable of recovering the yield rate when the yield rate gradually becomes lower during production of a conjugated diene polymer. The conjugated diene polymer is produced by using a transition metal catalyst, and an organoaluminum compound as a co-catalyst. The yield rate gradually becomes lower when successive production of the conjugated diene polymer is continued. In response, the supplied amount the co-catalyst is adjusted on the basis of the generation level of inactivate substances generated in the reaction system. Specifically, increasing the amount of the co-catalyst is started when the generation level becomes equal to or lower than a predetermined value. Furthermore, increasing the amount of the co-catalyst is stopped when determined that sufficient recovery has occurred. More specifically, supply of the predetermined amount that had been supplied before the amount was increased is started. |
