The selective oxidation of benzyl alcohols in a membrane reactor

Modeling and kinetics of allylation of phenol in a triphase‐catalytic membrane reactor

“…Stanley and Quinn11 reported a membrane reactor using tetra‐ n ‐butyl ammonium bromide (TBAB) as the homogeneous catalyst, which operated in the continuous mode. Grigoropoulou et al12 reported the selective oxidation of benzyl alcohols using a porous polytetrafluoroethylene (PTFE) membrane to separate the aqueous and organic phases using tetrabutylammonium hydrogen sulfate (TBAHS) as the homogeneous catalyst. As mentioned in the above experimental results, these membrane configurations do not actually aid in the separation of the catalyst from the reaction matrix.…”

Kinetics of allylation of phenol using quaternary ammonium membranes in a membrane reactor

“…In the phase-transfer catalytic reaction (Dehmlow and Dehmlow, 1993;Starks et al, 1994;Wu, 2005), Stanley and Quinn (1987) reported a membrane reactor which operated in the continuous mode using tetra-n-butyl ammonium bromide (TBAB) as the homogeneous catalyst, while Grigoropoulou et al (2001) reported the selective oxidation of benzyl alcohols using a porous PTFE membrane to separate the aqueous and organic phases using tetrabutylammonium hydrogen sulfate (TBAHS) as the homogeneous catalyst. These membrane configurations, however, do not aid in the separation of the catalyst from the reaction matrix because of the fact that the catalyst was not immobilized in the membrane.…”

Catalysis for green chemistry

“…We have proven the activ- ity of such materials in reactions including the important carbon-carbon bond forming Heck and Suzuki reactions [14]. It is also possible to build quite complex organic structures on the surfaces of mesoporous materials, including those active in typically phase-transfer-catalyzed processes where a membrane version could be used in an interfacial reaction system that keeps the organic and inorganic component of an organic process separate, hence alleviating separation difficulties and reducing waste [15].…”