Converting industrial waste contact masses into effective multicomponent copper-based catalysts for the Rochow process

TY - JOUR

T1 - Converting industrial waste contact masses into effective multicomponent copper-based catalysts for the Rochow process

AU - Liu, Hezhi

AU - Ji, Yongjun

AU - Zhu, Yongxia

AU - Wang, Guangna

AU - Wang, Xueguang

AU - Zhong, Ziyi

AU - Su, Fabing

N1 - Publisher Copyright: © 2017 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences

PY - 2018/4

Y1 - 2018/4

N2 - In this work, we report a simple and inexpensive approach to synthesize effective multicomponent Cu–Cu2O–CuO catalysts for the Rochow process from industrial waste contact masses (WCMs). WCMs from the organosilane industry were treated with acid followed by reduction with metallic iron powder. The obtained copper powder was then subjected to controlled oxidation in air at different temperatures, followed by ball milling. The orthogonal array approach was applied to optimize this process, and the stirring speed and pH were found to significantly affect the leaching ratio and copper yield, respectively. When used for the Rochow process, the optimized ternary Cu–Cu2O–CuO catalyst greatly enhanced the dimethyldichlorosilane selectivity and Si conversion compared with Cu–Cu2O–CuO catalysts prepared without ball milling, bare Cu catalysts, and Cu–Cu2O–CuO catalysts with different compositions. This could be attributed to their small particle size and the strong synergistic effect among the multiple components in the catalyst with the optimized composition.

AB - In this work, we report a simple and inexpensive approach to synthesize effective multicomponent Cu–Cu2O–CuO catalysts for the Rochow process from industrial waste contact masses (WCMs). WCMs from the organosilane industry were treated with acid followed by reduction with metallic iron powder. The obtained copper powder was then subjected to controlled oxidation in air at different temperatures, followed by ball milling. The orthogonal array approach was applied to optimize this process, and the stirring speed and pH were found to significantly affect the leaching ratio and copper yield, respectively. When used for the Rochow process, the optimized ternary Cu–Cu2O–CuO catalyst greatly enhanced the dimethyldichlorosilane selectivity and Si conversion compared with Cu–Cu2O–CuO catalysts prepared without ball milling, bare Cu catalysts, and Cu–Cu2O–CuO catalysts with different compositions. This could be attributed to their small particle size and the strong synergistic effect among the multiple components in the catalyst with the optimized composition.

KW - Acid leaching

KW - Controlled synthesis

KW - Copper-based catalyst

KW - Rochow reaction

KW - Solid Waste

UR - http://www.scopus.com/inward/record.url?scp=85028462701&partnerID=8YFLogxK

U2 - 10.1016/j.partic.2017.05.008

DO - 10.1016/j.partic.2017.05.008

M3 - 文章

AN - SCOPUS:85028462701

SN - 1674-2001

VL - 37

SP - 1

EP - 8

JO - Particuology

JF - Particuology

ER -