1,2,3,9-四氢咔唑-4-酮生产废液处理及氯化锌回收利用

doi:10.11944/j.issn.1000-0518.2020.01.190160

摘要/Abstract

摘要：

1,2,3,9-四氢咔唑-4-酮生产废液量大且危害严重,本文探究了NaClO、H₂O₂氧化处理废液的效果及存在的问题,同时提出了高温碳化处理的新工艺路线。实验结果表明,采用NaClO、H₂O₂氧化处理废液未能达到理想要求,且回收的固体色泽差、无催化活性。而废液经143 ℃蒸馏、残留液500 ℃高温碳化处理40 min后回收的氯化锌,具有良好催化活性,可使单苯腙转化率达到52.6%,实现了其在1,2,3,9-四氢咔唑-4-酮生产过程中的循环利用。研究结果为1,2,3,9-四氢咔唑-4-酮生产废液处理及资源综合利用提供了一条新途径。

关键词: 1,2,3,9-四氢咔唑-4-酮, 氧化处理, 高温碳化, 氯化锌

Abstract:

A large amount of wastewater in the production process of 1,2,3,9-tetrahydrocarbazol-4-one is generated and leads to severe harm. In this work, the effects and existing problems in oxidation treatment were investigated. Meanwhile, the new process route of high-temperature carbonization treatment was developed. The results show that the oxidation treatments with NaClO and H₂O₂ fail to achieve the desired effect, and the recycled solid is poor in color and has no catalytic activity. However, zinc chloride recovered through distilling at 143 ℃ and high-temperature carbonization at 500 ℃ for 40 min, exhibits excellent catalytic activity, which makes the conversion of monophenylhydrazone reach 52.6%. Ultimately, the reclamation of zinc chloride in the production of 1,2,3,9-tetrahydrocarbazol-4-one is realized. At the same time, the experimental results provide a new way for the treatment of 1,2,3,9-tetrahydrocarbazol-4-one production wastewater and comprehensive utilization of resources.

Key words: 1,2,3,9-tetrahydro-4H-carbazol, oxidation treatment, high-temperature carbonization, zinc chloride

刘西德, 周迪, 张兆顺. 1,2,3,9-四氢咔唑-4-酮生产废液处理及氯化锌回收利用[J]. 应用化学, 2020, 37(1): 117-122.

LIU Xide, ZHOU Di, ZHANG Zhaoshun. Wastewater Treatment and Recycle of Zinc Chloride in 1,2,3,9-Tetrahydro-4H-carbazol-4-one Production Process[J]. Chinese Journal of Applied Chemistry, 2020, 37(1): 117-122.

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