Hydrogenation of tar residue derived from the synthesis of rubber vulcanization accelerator 2-mercaptobenzothiazole

作者：Zhao, Jianhong; Cheng, Xianglin^*; Wang, Liucheng; Wang, Jianshe; Song, Chengying

来源：Asia-Pacific Journal of Chemical Engineering, 2017, 12(3): 400-405.

DOI：10.1002/apj.2082

• hydrogenation
• 2-mercaptobenzothiazole
• toxic tar residue
• pyrite

A large amount of hazardous tar residue is produced during the synthesis of rubber vulcanization accelerator 2-mercaptobenzothiazole (MBT). In this study, pyrite (FeS2) was used as catalyst for the hydrogenation of the tar residue under different conditions. Optimal hydrogenation conditions were as follows: 270 degrees C under an H-2 pressure of 4.5 MPa for 8 h under a catalyst loading of 2%. MBT presented in tar residue is converted to benzothiazole (BT) by a high yielding hydrogenation in 86.9% yield based on the initial amount of BT with a small quantity aniline also produced as side product. This work provides a framework for possible ways to treat the toxic tar residue formed in the industrial synthesis of BT through the hydrogenation procedure established in this study.

• 出版日期2017-5
• 单位郑州大学