A Comparison between Continuous and Batch Processes to Capture Aldehydes and Ketones by Using a Scavenger Resin

Abstract

A low-cost isoniazid-based scavenger resin was previously prepared and successfully used to capture aldehydes and ketones in solution by using a batch approach. The present work compares batch and continuous processes in relation to the preparation of the scavenger resin and the effectiveness of cyclohexanone scavenging. The batch preparation of the resin proved to be the better choice because the resin produced in the continuous flow suffered deformation on its surface that prevented access to the active sites in the internal porous polymer matrix. Conversely, the continuous-flow approach presented higher capturing yields than the batch. The optimized scavenging process was successfully used to remove formaldehyde present in a solution and the carbonyl compounds present in an ethanolic extract of Cymbopogon citratus.

Catalytic hydrogenation of nitrocyclohexane as an alternative pathway for the synthesis of value-added products

“…The transition from batch to flow operation conditions is not the ultimate goal for all industrial syntheses, especially in the case of well-established manufacturing processes. The possibility and profitability of such transformations have been the subject of much research in the past two decades [11][12][13][14][15] . Some researchers approached this issue in a very comprehensive and universal manner.…”

“…Similar work was performed by Teoh et al 17 by proposing practical assessment technology for converting fine chemicals production from batch to continuous. Nevertheless, the most important conclusion from these studies [11][12][13][14][15][16][17] is the need for an in-depth analysis of already performed research and the use of developed solutions.…”

Sensory Relevance of Strecker Aldehydes in Wines. Preliminary Studies of Its Removal with Different Type of Resins

“…Taking into account the relevance of aldehydes and their reactivity, their removal might look interesting in wine as it is necessary in many areas such as pharmacy [12], industry [13], food [14] or biotechnology [15]. Such removal can be carried out in following different approaches such as distillation, gas stripping, pervaporation, solvent extraction, solid phase extraction [16], derivatisation [17] or precipitation and filtration from an organic solvent [15]. Nevertheless, for wine and with the intention of scaling the process of elimination of aldehydes to the winemaking process, it seems that the most appropriate methodology would be to use solid phase extraction with resins.…”

Switching from Batch to Continuous Reactors Is a Trajectory Optimization Problem

“…In addition, experimental feasibility studies of the switch are very common. Some of these studies consider individual reactions of interest and typically involve synthesizing the desired chemical(s) in both batch reactors and CFRs and then comparing the reactor performance (see, for example, refs − ). A literature review of reactions carried out in CFRs is provided by Anderson .…”