Rhodium elution from polymer-bonded hydroformylation catalysts

Lang, William W.; Jurewicz, Anthony T.; Haag, Werner O.; Whitehurst, D.D.; Rollmann, Louis D.

doi:10.1016/s0022-328x(00)93615-5

Cited by 50 publications

(6 citation statements)

References 13 publications

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“…Some of the earliest reports of organic polymer supported coordination complex catalysts appeared in 1971-1972, with Grubbs [7], Collman [8] and Capka [9] all publishing communications that year. The field then grew rapidly in the 1970s, with numerous reports throughout the decade describing an array of different supported homogeneous catalysts for chemistries including hydrosilylation [10], asymmetric hydrogenation [11], oligomerization [12], carbonylation [13], and hydroformylation [14,15], with periodic reviews categorizing the field [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

On the Stability and Recyclability of Supported Metal–Ligand Complex Catalysts: Myths, Misconceptions and Critical Research Needs

2010

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Research on heterogenized metal complex catalysts has been carried out for 40 years. Despite thousands of published catalysts, there are only two significant commercial processes that utilize supported metal complex catalysts. Most academic papers are simply ''demonstration of concept'' studies reporting myriad ways to support various metal complex catalysts. Too few papers focus on rigorous studies of reaction kinetics, catalyst recycle, catalyst stability and deactivation pathways. Here, preliminary stability and deactivation studies of supported enantioselective Co-salen epoxide ring-opening catalysts and enantioselective Ru-salen olefin cyclopropanation catalysts are summarized. Insights with regard to catalyst deactivation suggest methodologies for catalyst stabilization, allowing for more effective catalyst recycle and enhanced catalyst turnover. Further examples where supported metal complex catalysts are applied in commercial processes will require the field to shift focus from ''demonstration of concept'' studies to more detailed investigations of catalyst stability and recyclability.

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Section: Introductionmentioning

confidence: 99%

On the Stability and Recyclability of Supported Metal–Ligand Complex Catalysts: Myths, Misconceptions and Critical Research Needs

2010

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“…Techniques that have been used to separate products from catalyst include distilling the products from the reaction medium; coordinating the metal to a functionalised organic polymer or inorganic support; or using a semipermeable membrane . Generally, these systems lack the combined activity/selectivity of their homogeneous counterparts at low temperatures. , …”

Section: Introductionmentioning

confidence: 99%

Optimisation of Palladium-Based Supported Liquid-Phase Catalysts in the Heck Reaction

Mirza

Anson

Hellgardt

et al. 1998

Org. Process Res. Dev.

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Heck reactions using sulphonated triphenylphosphine palladium complexes have been carried out using a supported liquid-phase catalysis system in a batch reactor. The catalyst complex is held in solution in a polar, hydrophilic film supported upon porous glass beads whilst reactants and products are restricted to a nonmiscible solvent phase. Several factors in the preparation of the supported catalyst were investigated with the aim of ensuring good assembly, distribution, and immobilisation of the catalyst complex across the surface of the beads. The thickness of the hydrophilic film upon the porous glass beads was varied. The hydrophilic nature of the ligand complex was studied using mono- and trisulphonated sodium and lithium salts of triphenylphosphine. The effects of level of catalyst loading and ligand/catalyst ratio upon leaching and activity were also examined. These factors have been examined to develop a better understanding of the catalysis occurring in supported liquid-phase systems.

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“…Heterogenization of the rhodium catalyst on a support containing amino groups has also been exploited as a strategy to reuse the catalyst. 31,[41][42][43][44][45][46] In our case, given that the catalytic active system has been reported above as to be composed of polar rhodium cluster species, an original approach based on a chromatographic technique to recycle the catalyst has been set up. The protocol is quite easy to realise and was done under atmospheric conditions.…”

Section: Recycling Experimentsmentioning

confidence: 99%

Synthesis of diols from jojoba oil via rhodium-catalyzed reductive hydroformylation: a smart way to access biobased polyurethanes

et al. 2022

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Rhodium elution from polymer-bonded hydroformylation catalysts

Cited by 50 publications

References 13 publications

On the Stability and Recyclability of Supported Metal–Ligand Complex Catalysts: Myths, Misconceptions and Critical Research Needs

On the Stability and Recyclability of Supported Metal–Ligand Complex Catalysts: Myths, Misconceptions and Critical Research Needs

Optimisation of Palladium-Based Supported Liquid-Phase Catalysts in the Heck Reaction

Synthesis of diols from jojoba oil via rhodium-catalyzed reductive hydroformylation: a smart way to access biobased polyurethanes

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