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Application of activated carbon supported cobalt(II) tetraaminophthalocyanine towards preparation of dimethyl disulfide

Chongqing Unis Chemical Company Ltd., Uranus A-13, North Star Road, Yubei District, Chongqing 401121, China

School of Chemistry and Chemical Engineering, Chongqing University of Technology, No. 69, Hongguang Avenue, Banan District, Chongqing 400054, China

The author contributed equally to this work.

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Mingxing Dai

School of Chemistry and Chemical Engineering, Chongqing University of Technology, No. 69, Hongguang Avenue, Banan District, Chongqing 400054, China

The author contributed equally to this work.

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Xuejun Quan

Chongqing Unis Chemical Company Ltd., Uranus A-13, North Star Road, Yubei District, Chongqing 401121, China

School of Chemistry and Chemical Engineering, Chongqing University of Technology, No. 69, Hongguang Avenue, Banan District, Chongqing 400054, China

E-mail Address: hengjunq@cqut.edu.cn

Correspondence to: Xuejun Quan, tel.: +86 (0)23 62563180.

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Shuo Li

School of Chemistry and Chemical Engineering, Chongqing University of Technology, No. 69, Hongguang Avenue, Banan District, Chongqing 400054, China

E-mail Address: lishuo@cqut.edu.cn

Correspondence to: Shuo Li, tel.: +86 0(0)23 62563183.

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Daomin Zheng

Chongqing Unis Chemical Company Ltd., Uranus A-13, North Star Road, Yubei District, Chongqing 401121, China

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Yaling Liu

Chongqing Unis Chemical Company Ltd., Uranus A-13, North Star Road, Yubei District, Chongqing 401121, China

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, and

Rujie Yao

Chongqing Unis Chemical Company Ltd., Uranus A-13, North Star Road, Yubei District, Chongqing 401121, China

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https://doi.org/10.1142/S108842461950010XCited by:1 (Source: Crossref)

Abstract

Dimethyl disulfide (DMDS) is an important fine chemical that can be prepared by the refined Merox process of oxidation of sodium methyl mercaptide (SMM) in the presence of a catalyst. In this paper, a novel activated carbon (AC) supported cobalt(II) tetraaminophthalocyanine (AC-CoTAPc) catalyst was prepared by the chemical grafting method. EA, UV-vis, FT-IR, BET and XPS were used to characterize the structure of the new catalyst. The effects of reaction time, catalyst dosage, reaction temperature and oxygen pressure on SMM conversion per pass (CPP $_{S M M})$ $_{S M M})$ , yield (Yield $_{D M D S})$ $_{D M D S})$ and purity of DMDS product (Purity $_{D M D S})$ $_{D M D S})$ were investigated to evaluate the catalytic performance of new AC-CoTAPc catalyst. The results show that free CoTAPc is easily dissolved in this DMDS product, which needs extra post treatment and cannot be reused. The supported catalyst AC-CoTAPc can easily solve these problems and can be properly reused four times to get Yield $_{D M D S}$ $_{D M D S}$ and CPP $_{S M M}$ $_{S M M}$ higher than 70% and 90%. Under optimum conditions, the Yield $_{D M D S}$ $_{D M D S}$ andCPP $_{S M M}$ $_{S M M}$ of the AC-CoTAPc catalyst could be as high as 87.4% and 98.1%, with a purity $_{}$ of DMDS product of above 99.9%. AC-CoTAPc exhibits better catalytic and reuse performance than the commercial AC-supported sulphonated cobalt(II) phthalocyanine (AC-CoPcS) catalyst and shows broad industrial application prospects.

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