The ligand coordination approach for improving the stability of low-mercury catalyst in the hydrochlorination of acetylene

Xiaolong Xu; Haihua He; Jia Zhao; Bailin Wang; Shanchuan Gu; Xiaonian Li

doi:10.1016/j.cjche.2016.12.003

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The ligand coordination approach for improving the stability of low-mercury catalyst in the hydrochlorination of acetylene

Catalysis, kinetics and reaction engineering | Updated：2026-01-06

- The ligand coordination approach for improving the stability of low-mercury catalyst in the hydrochlorination of acetylene
- Chinese Journal of Chemical Engineering Vol. 25, Issue 9, Pages: 1217-1221(2017)
- Affiliations：
  
  Institute of Industrial Catalysis of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology,Hangzhou,China,310032
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.12.003
  CLC：
- Published：2017
- Accepted：
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Xiaolong Xu, Haihua He, Jia Zhao, Bailin Wang, Shanchuan Gu, Xiaonian Li. The ligand coordination approach for improving the stability of low-mercury catalyst in the hydrochlorination of acetylene[J]. , 2017, 25(9): 1217-1221.
DOI：

Xiaolong Xu, Haihua He, Jia Zhao, Bailin Wang, Shanchuan Gu, Xiaonian Li. The ligand coordination approach for improving the stability of low-mercury catalyst in the hydrochlorination of acetylene[J]. , 2017, 25(9): 1217-1221. DOI： 10.1016/j.cjche.2016.12.003.

摘要

Abstract

Mercuric chloride supported on activated carbon (HgCl

/AC) is used as an industrial catalyst for the hydrochlorination of acetylene. Loss of HgCl

by sublimating from the surface of activated carbon causes the irreversible deactivation of mercury catalyst and environmental pollution. In this work

a ligand coordination approach based on the Principle of Hard and Soft Acids and Bases (HSAB) was employed to design more stable lowmercury catalyst. The low-mercury catalysts (4% HgCl

loading) were prepared by using HgCl

and potassium halides (KX

X=Cl

I) as precursors. The HgCl

-4KI/AC catalyst showed best catalytic stability than HgCl

/AC and HgCl

-4KCl/AC in the hydrochloriantion of acetylene. HgCl

could form more stable complex with KI

HgI

as the main active component of the HgCl

-4KI/AC catalyst. The characterizations of XRD and EDX analysis illustrated that the active component of HgCl

-4KI/AC was highly dispersed on the surface of activated carbon. The sublimation rates of HgCl

from the catalysts

verified that the active component with larger stability constant had better thermal stability. Using Hg(Ⅱ) complexes with high stability constant as the active component may be the research direction of developing highly stable low-mercury catalyst for the hydrochlorination of acetylene.

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