Preparation of Rh-TPPTS complex intercalated layered double hydroxide and influences of host and guest compositions on its catalytic performances in hydroformylation reaction

Zhang, Xian; Liu, Jin; Wei, Min

doi:10.1007/s11434-008-0071-5

Cited by 9 publications

(8 citation statements)

References 35 publications

(37 reference statements)

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“…For historical perspective, mention should be made of the scientifi c studies where different types of inorganic carriers such as silicon oxide [4][5][6][7], zeolites [8][9][10], and activated carbon [11,12] were used as materials for immobilization of metal complexes. The range of insoluble carriers used in the processes was considerably expanded thereafter, and at present the main metal fi xing methods include: incorporation of metal nanoparticles into the structures of various materials [13,18]; fi xing the rhodium complexes in the structure of the material by intercalation [19]; encapsulation of phosphine or a phosphine complex into mesopores or nanopores of the carrier [20,21]; the sol-gel method, "grafting" of a phosphine-containing hydrocarbon radical onto the carrier surface, and other methods of covalent bonding of phosphine fragments on an inorganic, hybrid or organic substrate, wherein rhodium is subsequently introduced [22][23][24][25][26][27][28]; fi xing of phosphine or a phosphine complex on the surface by means of ionic interactions [29]; fi xing of catalysts soluble in polar liquids (water and ionic liquid) in the thin hydrophilic layer of the carrier, which most frequently is silica gel SAPC/SIPC (Supported Aqueous/Ionic Liquid Phase Catalysts) [30,31]; creation of structures containing single rhodium atoms, as per the "single atom" concept [32], such as the cases in which nano-objects (nanosheets and nanofi bers) made of cobalt oxide [33] or zirconium oxide [34] were obtained and their catalytic properties were studied. Heterogeneous modifi ed rhodium clusters [35] and an iron-based catalyst [36] are also reported to have been used.…”

Section: Doi: 101134/s0965544121010011mentioning

confidence: 99%

Polymeric Heterogeneous Catalysts in the Hydroformylation of Unsaturated Compounds

et al. 2020

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This review deals with heterogeneous hydroformylation catalysts, specifically metal complexes fixed in an organic polymer structure. It describes the main catalyst synthesis methods, provides data on hydroformylation of unsaturated compounds (including asymmetric hydroformylation), and shows how those compounds can be used. The special focus is on the systematization of data on heterogeneous catalysts developed on the basis of porous organic polymers. Due to their porous structure, resistance to organic media and the high concentration of heteroatoms they contain, these materials can be considered promising for developing highly active, selective and stable heterogeneous catalysts for hydroformylation of unsaturated compounds, particularly higher linear olefins.

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Section: Doi: 101134/s0965544121010011mentioning

confidence: 99%

Polymeric Heterogeneous Catalysts in the Hydroformylation of Unsaturated Compounds

et al. 2020

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“…[ 17 – 20 ]. Host-guest composites, which are prepared by incorporation of guest compounds into host materials [ 21 – 24 ]. Hybrid composites, which comprise a matrix material (polymer, carbon, etc. )…”

Section: Introductionmentioning

confidence: 99%

“…Host-guest composites, which are prepared by incorporation of guest compounds into host materials [ 21 – 24 ].…”

Section: Introductionmentioning

confidence: 99%

An Overview of Recent Development in Composite Catalysts from Porous Materials for Various Reactions and Processes

Xie

Liu

Wang

et al. 2010

IJMS

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Catalysts are important to the chemical industry and environmental remediation due to their effective conversion of one chemical into another. Among them, composite catalysts have attracted continuous attention during the past decades. Nowadays, composite catalysts are being used more and more to meet the practical catalytic performance requirements in the chemical industry of high activity, high selectivity and good stability. In this paper, we reviewed our recent work on development of composite catalysts, mainly focusing on the composite catalysts obtained from porous materials such as zeolites, mesoporous materials, carbon nanotubes (CNT), etc. Six types of porous composite catalysts are discussed, including amorphous oxide modified zeolite composite catalysts, zeolite composites prepared by co-crystallization or overgrowth, hierarchical porous catalysts, host-guest porous composites, inorganic and organic mesoporous composite catalysts, and polymer/CNT composite catalysts.

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“…Hyperfine magnesium hydroxide has been very effective at improving the flame retardance and mechanical properties of polymeric materials, but its dispersion in polymer matrices is very difficult [2]. In recent years, the intercalated or exfoliated polymer/ LDH nanocomposites have attracted great interest in the field of materials science, because of their excellent thermal stability, flame retardance, and physico-chemical properties [3][4][5][6]. In the present work, we use MH and organic modified LDH layers as a flame retardant system and study their synergistic effects on the morphology and structure, flame retardant properties and mechanical properties of EVA/MH/ LDH nanocomposites.…”

mentioning

confidence: 99%

Performance of halogen-free flame retardant EVA/MH/LDH composites with nano-LDHs and MH

Ding

2011

Chin. Sci. Bull.

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The flammability properties of three series of Ethylene-Vinyl Acetate/Magnesium Hydroxide/Layered Double Hydroxide (EVA/MH/LDH) composites as well as the flame retardance effect between LDH and the conventional flame retardant additive MH are investigated. In addition to acting as an insulating barrier, LDH assists the dispersion of MH particles in the EVA matrix, and promotes the formation of the char residues because of its abundant interlayer hydroxyl groups. Composites containing LDH show good flame retardancy in Cone and LOI testings. This means that the combustion properties of the composites have decreased, which may lessen the fire hazard when this materials are used. Ethylene-vinyl acetate copolymers (EVA) with different vinyl acetate (VA) contents are extensively used in many fields, especially in the cable industry as excellent insulating materials with good physical and chemical properties [1]. However, EVA resins are particularly flammable and emit a large amount of smoke when burnt. Magnesium hydroxide is a conventional non-toxic, smoke-suppressing halogen-free flame retardant additive with a high decomposition temperature that is used in flame retardant polymeric materials. However, its flame retardant efficiency is low, so very large amounts must be used, leading to a sharp drop in the mechanical properties of the flame retardant materials. To minimize this effect, the dispersion of MH and its compatibility with the polymer matrix must be improved. The use of very small (hyperfine) particles and surface treatment of MH are two important methods to achieve this. The usual surface modifiers for MH are organic reagents or polymers, which could be detrimental to combustion properties such as the limiting oxygen index (LOI). Hyperfine magnesium hydroxide has been very effective at improving the flame retardance and mechanical properties of polymeric materials, but its dispersion in polymer matrices is very difficult [2]. In recent years, the intercalated or exfoliated polymer/ LDH nanocomposites have attracted great interest in the field of materials science, because of their excellent thermal stability, flame retardance, and physico-chemical properties [3][4][5][6]. In the present work, we use MH and organic modified LDH layers as a flame retardant system and study their synergistic effects on the morphology and structure, flame retardant properties and mechanical properties of EVA/MH/ LDH nanocomposites. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), LOI, dynamic mechanical thermal analysis (DMTA), and cone calorimetry (Cone) tests are performed. The aim is to study the effects of adding LDH and MH to EVA resin (in particular its flame retardant and mechanical properties), and also to explore three difference synergistic systems containing MgAl-LDH, ZnAl-LDH, or MgFe-LDH. The main purpose of this study is to develop a new type of low smoke, halogen-free flame retardant Ding Y Y, et al. Chinese Sci Bull December (2011) and sodium dodecyl sulfate...

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Preparation of Rh-TPPTS complex intercalated layered double hydroxide and influences of host and guest compositions on its catalytic performances in hydroformylation reaction

Cited by 9 publications

References 35 publications

Polymeric Heterogeneous Catalysts in the Hydroformylation of Unsaturated Compounds

Polymeric Heterogeneous Catalysts in the Hydroformylation of Unsaturated Compounds

An Overview of Recent Development in Composite Catalysts from Porous Materials for Various Reactions and Processes

Performance of halogen-free flame retardant EVA/MH/LDH composites with nano-LDHs and MH

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