Alkoxylation for Surfactant Productions: Toward the Continuous Reactors

Tesser, Riccardo; Russo, Vincenzo; Santacesaria, E.; Hreczuch, W.; Serio, Martino Di

doi:10.3389/fceng.2020.00007

Cited by 4 publications

(2 citation statements)

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“…In STLR, the sprayed liquid is dispersed in the form of small liquid drops flying into the alkylene oxide gaseous atmosphere. Drops emerging from an efficient spray nozzle resulted as internally well-mixed drops, leading to a very high masstransfer rate, and if the average flight time of the drops is long enough, these drops are completely saturated at the end of their flight (Tesser et al, 2020). The reaction occurs in the liquid column (Santacesaria et al, 1990;Santacesaria et al, 1999) and can be neglected the drops contribution to the reaction, since the flight time is extremely short if compared to the residence time in the liquid column.…”

Section: Description Of the Reactors And The Related Mathematical Modelmentioning

confidence: 99%

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The Evolution of the Fed Batch Ethoxylation Reactors to Produce the Non-Ionic Surfactants

et al. 2021

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The most recent reactor technology to produce non-ionic surfactants via ethoxylation reaction is illustrated in the present work. The most advanced reactors are deeply illustrated for what concerns the working principle and the main performance. In detail, Venturi Loop Reactor (VLR), Spray Tower Loop Reactor (STLR) and Enhanced Loop Reactor (ELR) are depicted, and the related performance compared. ELR shows the highest flexibility, to reach the desired ethoxylation degree, and at the same time good performances comparable with the VLR. Moreover, ELR allows to reach high ethoxylation degree, as in this condition, a good mixing, in the case of high liquid expansion, is difficult to be achieved with the other reactors. Thus, it is possible to work at higher ethoxylation degree respecting safety issues. Finally, a comprehensive model was proposed to describe quantitatively the mentioned reactors. The model is characterized by a general validity and can be easily adapted to each specific reactor configuration.

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Section: Description Of the Reactors And The Related Mathematical Modelmentioning

confidence: 99%

“…Notwithstanding the new quite recent proposals for continuous reactor (Tesser et al, 2020), the ethoxylated products synthesis is still largely based on fed-batch reactors technology in various configurations.…”

Section: Introductionmentioning

confidence: 99%