- MANUFACTURING METHOD FOR THE ALDEHYDE BY HYDROFORMYLATION REACTION
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A phosphine ligand represented by chemical formula 1. Transition metal catalyst A hydroformylation catalyst composition comprising a solvent and a solvent. Provided is a process for preparing aldehydes by hydroformylation using olefinic compounds and formaldehyde to produce aldehydes.
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Paragraph 0079-0081; 0083-0084; 0101
(2021/07/13)
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- RhCl(TPPTS)3 encapsulated into the hexagonal mesoporous silica as an efficient heterogeneous catalyst for hydroformylation of vinyl esters
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RhCl(TPPTS)3 (TPPTS = m-trisulphonato triphenyl phosphine) was in situ encapsulated into the mesopores of hexagonal mesoporous silica (HMS) by in situ method. The catalyst was characterized by P-XRD, 31P-CPMAS NMR, FT-IR, N2 adsorption, TGA, TEM and ICP techniques. These characterization confirmed the encapsulation and heterogenization of RhCl(TPPTS)3. The synthesized heterogeneous catalyst evaluated for hydroformylation of vinyl esters gave 100% conversion and high selectivity to iso-aldehyde. Vinyl acetate was subjected as a representative vinyl ester for detailed investigations. The performance of the catalyst in terms of conversion and selectivity depended on the studied parameters: amount of the catalyst, substrate, partial pressure of CO and H2, and temperature. Recyclability aspects of the heterogenized catalyst are investigated.
- Sudheesh,Chaturvedi, Amit K.,Shukla, Ram S.
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experimental part
p. 99 - 105
(2012/02/16)
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- Investigations on the kinetics of hydroformylation of 1-hexene using HRh(CO)(PPh3)3 encapsulated hexagonal mesoporous silica as a heterogeneous catalyst
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Kinetics of HRh(CO)(PPh3)3 encapsulated in hexagonal mesoporous silica has been investigated for the heterogeneous catalyzed hydroformylation of 1-hexene. The rates of hydroformylation of C5-C12 alkenes, determined under identical conditions, indicated a decreasing trend on increasing the chain length of the alkenes. The representative alkene, 1-hexene has been subjected for detail kinetic investigations. The 1-hexene hydroformylation kinetics has been studied as the function of the amount of catalyst, concentration of 1-hexene, partial pressure of CO and H2, and temperature. All these parameters were found to influence the rate of hydroformylation. The rate was observed to be first order with respect to partial pressure of hydrogen. The rate was observed to increase with the increase in the amount of the catalyst and approached saturation on increasing the catalyst amount. Rates increased on increasing the CO pressure and 1-hexene concentration up to certain values, and on further increasing these parameters, substrate inhibited kinetics was observed for both CO and 1-hexene at higher pressures and concentrations, respectively. A kinetic rate model based on the mechanism of hydroformylation of 1-hexene was found to fit with the experimental rate with ±15% deviation.
- Sudheesh,Sharma, Sumeet K.,Shukla, Ram S.,Jasra, Raksh V.
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experimental part
p. 23 - 29
(2010/05/01)
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