Supported liquid phase hydroformylation catalysts containing rhodium and triphenylphosphine. Effects of additional solvents and kinetics

Hjortkjaer, Jes; Scurrell, Michael S.; Simonsen, Peter; Svendsen, Henrik

doi:10.1016/0304-5102(81)80005-3

Cited by 34 publications

(14 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, each ligand's dynamic mobility may allow it to pass a pore that is slightly smaller than the diameters shown in Table 1. [13] For the smallest ligand, TPP, a minimum diameter of 1.08 nm was found, which is significantly larger than the 0.72 nm calculated by Hjortkjaer et al [11] In contrast, Okumura et al [13] described the size of TPP as 1.0 nm, which is significantly closer to the calculated values. Furthermore, we estimated a minimum diameter of 0.91 nm for the tri(4-methoxy)phenylphosphine (TMPP) molecule, whereas a diameter of 1.30 nm, was calculated by DFT.…”

Section: Dft Calculations On the Probe Molecule Sizementioning

confidence: 49%

“…In a previous report, these sized were estimated. [9] Herein, the estimations from the work of Hjortkjaer et al [11] were replaced by DFT-calculations on the diameter of the molecules. The Conformer-Rotamer Ensemble Sampling Tool (CREST) was applied for conformer search, followed by DFT optimization at the B3LYP-D3 level, and the smallest diameters found for the molecules are presented in Table 1.…”

Section: Dft Calculations On the Probe Molecule Sizementioning

confidence: 99%

See 1 more Smart Citation

Quantitative Distinction between Noble Metals Located in Mesopores from Those on the External Surface

Rieg

Dittmann

et al. 2021

Chemistry A European J

View full text Add to dashboard Cite

We compare three methods for quantitatively distinguishing the location of noble metal (NM) particles in mesopores from those found on the external support surface. MCM-41 and SBA-15 with NM located in mesopores or on the external surface were prepared and characterized by TEM. 31 P MAS NMR spectroscopy was used to quantify arylphosphines in complexes with NM. Phosphine/NM ratios drop from 2.0 to 0.2 when increasing the probe diameter from 1.08 to 1.54 nm. The reaction between NM and triphenylphosphine (TPP) within 3.0 nm MCM-41 pores takes due to confinement effects multiple weeks. In contrast, external NM react with TPP instantly. A promising method is filling the pores by using the pore volume impregnation technique with tetraethylorthosilicate (TEOS). TPP loading revealed that 66 % of NMs are located on the external surface of MCM-41. The pore filling method can be used in association with any probe molecule, also for the quantification of acid sites.

show abstract

Section: Dft Calculations On the Probe Molecule Sizementioning

confidence: 49%

Section: Dft Calculations On the Probe Molecule Sizementioning

confidence: 99%

Quantitative Distinction between Noble Metals Located in Mesopores from Those on the External Surface

Rieg

Dittmann

et al. 2021

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…It is well known that in case of phosphine‐modified rhodium systems the maximum rate with P CO is highly dependent upon the Rh: PPh 3 ratio. At a higher ratio, the maximum is observed at higher P CO . The Rh:P ratio used in this work is 1:6, and hence such an observation is likely.…”

Section: Resultsmentioning

confidence: 76%

Kinetics of hydroformylation of 1‐decene using carbon‐supported ossified HRh(CO)(TPPTS)₃ catalyst

Pagar

Deshpande

2018

Int J of Chemical Kinetics

View full text Add to dashboard Cite

The kinetics of hydroformylation of 1‐decene has been investigated using a carbon‐supported ossified HRh(CO)(TPPTS)3/Ba catalyst in a temperature range of 343–363 K. The effect of concentration of 1‐decene, catalyst loading, partial pressure of H2 and CO, and stirring speed on the reaction rate has been investigated. A first‐order dependence was observed for catalyst concentration and hydrogen partial pressure. The rate showed a typical case of substrate inhibition for high 1‐decene concentration. The rate varied with a linear dependence on PCO up to a CO partial pressure of 5–6 MPa in contrast to the general trends; for most of the rhodium‐phosphine catalyzed hydroformylation reactions, severe inhibition of rate is observed with an increase in CO pressure. A rate equation has been proposed, which was found to be in good agreement with the observed rate data within the limit of experimental errors. The kinetic parameters and activation energy values have been reported.

show abstract

“…Polyethylene glycol, diphenyl ether, and other solvents of low vapor pressure can be substituted for benzylbutyl phthalate [41]. Polyethylene glycol, diphenyl ether, and other solvents of low vapor pressure can be substituted for benzylbutyl phthalate [41].…”

Section: Supported Liquid-phase Catalystsmentioning

confidence: 99%

Hydroformylation on Solid Catalysts

Лихолобов

Moroz

2008

Handbook of Heterogeneous Catalysis

View full text Add to dashboard Cite

The sections in this article are Fundamental Principles of Hydroformylation General Features and Scope Homogeneous Oxo Catalysts and Process Parameters A Cobalt Catalysts B Rhodium Catalysts C Catalysts other than Cobalt and Rhodium Compounds Reaction Mechanism Types of Solid Oxo Catalyst Hydroformylation with Immobilized Metal Complex Catalysts Supported Metal Complex Catalysts Supported Metal Complex Catalysts A Catalysts Anchored onto Ion‐Exchange Resins B Catalysts Prepared by Covalent Grafting C Catalysts Prepared by Coordinative Anchoring D Encapsulated Metal Complex Catalysts Hydroformylation over Supported Metal Catalysts

show abstract

Supported liquid phase hydroformylation catalysts containing rhodium and triphenylphosphine. Effects of additional solvents and kinetics

Cited by 34 publications

References 14 publications

Quantitative Distinction between Noble Metals Located in Mesopores from Those on the External Surface

Quantitative Distinction between Noble Metals Located in Mesopores from Those on the External Surface

Kinetics of hydroformylation of 1‐decene using carbon‐supported ossified HRh(CO)(TPPTS)₃ catalyst

Hydroformylation on Solid Catalysts

Contact Info

Product

Resources

About

Supported liquid phase hydroformylation catalysts containing rhodium and triphenylphosphine. Effects of additional solvents and kinetics

Cited by 34 publications

References 14 publications

Quantitative Distinction between Noble Metals Located in Mesopores from Those on the External Surface

Quantitative Distinction between Noble Metals Located in Mesopores from Those on the External Surface

Kinetics of hydroformylation of 1‐decene using carbon‐supported ossified HRh(CO)(TPPTS)3 catalyst

Hydroformylation on Solid Catalysts

Contact Info

Product

Resources

About

Kinetics of hydroformylation of 1‐decene using carbon‐supported ossified HRh(CO)(TPPTS)₃ catalyst