The following reaction conditions were found to be suitable: cobalt naphthenate 1.5 (by weight of toluene), mole ratio of Br to Co (Br/Co) 1.5; reaction temperature150 ~C, reaction time 4h, pressure 7MPa.

• 提出了最佳工艺条件，即环烷酸钴1.；5%25（Co 0