Supported liquid-phase rhodium catalyst for acetylene hydrochlorination

Panova, S. A.; Shestakov, G. K.; Темкин, О. Н.

doi:10.1039/c39940000977

Cited by 22 publications

(16 citation statements)

References 2 publications

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“…[6][7][8][9][10][11][12][13][14] Nevertheless metal chloride catalysts are often encountered with rapid deactivation problems because that some metallic cations are readily reduced to zero-valent metal by acetylene along with the reaction. 7,8 The weak interaction between catalysts and substrates also results in loss of active components.…”

Section: Introductionmentioning

confidence: 99%

Confining Noble Metal (Pd, Au, Pt) Nanoparticles in Surfactant Ionic Liquids: Active Non-Mercury Catalysts for Hydrochlorination of Acetylene

Yang

et al. 2015

ACS Catal.

106

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Metal catalysts often encounter the dilemma of rapid deactivation due to the reduction or particle aggregation/growth during the reaction. Here we reported an active and stable metal nanoparticles (NPs)/surfactant IL system for the catalytic hydrochlorination of acetylene. The NPs of Pd, Au, and Pt with a narrow size distribution and well-defined lattice fringes experienced in-situ generation in the reaction medium of anionic surfactant carboxylate ILs (ASC-ILs). Benefiting from the high reactivity of NPs and the self-assembly property of ASC-ILs, an effective redox cycle between Pd 0 and Pd II was established to reduce the deactivation of metal catalysts. The Pd NPs/surfactant IL systems showed excellent catalytic activity toward acetylene hydrochlorination. An acetylene conversion of 93% and a selectivity of 99.5% were achieved with no discernible deterioration over a reaction time of 55 hours. Furthermore, ASC-ILs were endowed with a unique property of the strong hydrogen-bond basicity, which was effective in absorbing and activating acetylene and HCl. This study manifests that metal NPs/surfactant IL systems are promising as substitutes for toxic mercury catalysts in the hydrochlorination of acetylene, and also is instructive for the stabilization of metal NPs.

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Section: Introductionmentioning

confidence: 99%

Confining Noble Metal (Pd, Au, Pt) Nanoparticles in Surfactant Ionic Liquids: Active Non-Mercury Catalysts for Hydrochlorination of Acetylene

Yang

et al. 2015

ACS Catal.

106

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“…Moreover, Panova et al 15 compared the activity of an N -methylpyrrolidone (MP) solution of RhCl 3 supported on activated carbon with HgCl 2 /C and AuCl 3 /C catalysts. The supported RhCl 3 liquid-phase catalyst showed the highest catalytic activity and the rhodium catalysts were the most stable in organic solvents.…”

Section: Homgeneous Mercury-free Catalystsmentioning

confidence: 99%

Research Progress on Mercury-Free Catalysts for Acetylene Hydrochlorination

Meng¹,

Ding²,

Wang³

et al. 2014

energy environ focus

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Vinyl chloride monomer (VCM) is mainly used for synthesis of polyvinyl chloride (PVC). Two methods are employed for industrial synthesis of vinyl chloride monomer, the hydrochlorination of acetylene and the dehydrochlorination of ethylene dichloride (1,2-dichloroethane). In China, about 70% of VCM products are produced from acetylene hydrochlorination. It is a great challenge to use new-type mercury-free catalysts instead of highly toxic activated carbon supported HgCl 2 catalyst. In this contribution, the progress in research on mercuryfree catalysts for acetylene hydrochlorination is summarized, and the development prospects of mercury-free catalysts are looked forward.

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“…The activity of the RhCl 3 -MP/C catalyst was 17500 h -1 whereas HgCl 2 /C was 3500 h -1 and HAuCl 4 /C was 5400 h -1 . The reaction temperature was 180°C and the selectivity was not mentioned [22].…”

Section: Other Metal Catalystsmentioning

confidence: 99%

“…In addition to AuCl 3 and PdCl 2 , a variety of other transition metal chlorides are known to have catalytic activity for acetylene hydrochlorination, such as Cu 2+ [21], Ag + [10], Pt 2+ [5,18], Rh 3+ [10,11,22], Ir 3+ [11] and Ru 3+ [10,11]. Nkosi et al compared the activity and deactivation rates of some metal chlorides in acetylene hydrochlorination (Table 1), and confirmed that the catalytic activity correlates well with the standard electrode potential of the metal.…”

Section: Other Metal Catalystsmentioning

confidence: 99%

Progress on cleaner production of vinyl chloride monomers over non-mercury catalysts

Zhang

Liu

et al. 2011

Front. Chem. Sci. Eng.

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Polyvinyl chloride (PVC) has become the third most used plastic after polyethylene and polypropylene and the worldwide demand continues to increase. Polyvinyl chloride is produced by polymerization of the vinyl chloride monomer (VCM), which is manufactured industrially via the dehydrochlorination of dichloroethane or the hydrochlorination of acetylene. Currently PVC production through the acetylene hydrochlorination method accounts for about 70% of the total PVC production capacity in China. However, the industrial production of VCM utilizes a mercuric chloride catalyst to promote the reaction of acetylene and hydrogen chloride. During the hydrochlorination, the highly toxic mercuric chloride tends to sublime, resulting in the deactivation of the catalyst and also in severe environmental pollution problems. Hence, for China, it is necessary to explore environmental friendly non-mercury catalysts for acetylene hydrochlorination as well as high efficiency novel reactors, with the aim of sustainable PVC production via the acetylene-based method. This paper presents a review of non-mercury heterogeneous and homogeneous catalysts as well as reactor designs, and recommends future work for developing cleaner processes to produce VCM over nonmercury catalysts with high activity and long stability.

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Supported liquid-phase rhodium catalyst for acetylene hydrochlorination

Abstract: A novel, highly active, supported liquid-phase, rhodium catalyst for acetylene hydrochlorination for mercury free production of vinyl chloride is described.

Cited by 22 publications

References 2 publications

Confining Noble Metal (Pd, Au, Pt) Nanoparticles in Surfactant Ionic Liquids: Active Non-Mercury Catalysts for Hydrochlorination of Acetylene

Confining Noble Metal (Pd, Au, Pt) Nanoparticles in Surfactant Ionic Liquids: Active Non-Mercury Catalysts for Hydrochlorination of Acetylene

Research Progress on Mercury-Free Catalysts for Acetylene Hydrochlorination

Progress on cleaner production of vinyl chloride monomers over non-mercury catalysts

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