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DC Field | Value | Language |
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dc.contributor.author | Arowo, Moses | - |
dc.date.accessioned | 2023-07-03T18:33:36Z | - |
dc.date.available | 2023-07-03T18:33:36Z | - |
dc.date.issued | 2023-06 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/abs/pii/S1004954122004244 | - |
dc.identifier.uri | http://ir.mu.ac.ke:8080/jspui/handle/123456789/7717 | - |
dc.description.abstract | The work herein employed a rotating packed bed (RPB) to intensify the sulfonation process of 1,4-diaminoanthraquinone leuco (DL) in an attempt to improve the yield of the product 1,4-diaminoanthraquinone-2-sulfonic acid (DSA). First, the effects of operating conditions in a stirred tank reactor (STR), including stirring speed, chlorosulfonic acid/DL molar ratio (η), solvent/DL mass ratio (ζ), reaction temperature and dropping speed of chlorosulfonic acid, on the yield of DSA were investigated. The yield of DSA can reach 87.34% under the optimal operating conditions: stirring speed of 500 r·min−1, η of 4.5, ζ of 7, reaction temperature of 150 °C, dropping speed of 0.61 ml·min−1. In addition, the kinetics of the sulfonation process via the shrinking core model revealed that the reaction is controlled by diffusion via a product layer under the reaction temperature of 140 °C. Furthermore, the RPB was employed to intensify the mass transfer between liquid and solid phases during the sulfonation reaction process. The results showed that the DSA yield of 92.69% obtained by RPB was 5.35% higher than that by STR, indicating that RPB can significantly intensify the mass transfer in the liquid–solid phase sulfonation reaction process. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Springer | en_US |
dc.subject | Chlorosulfonic acid | en_US |
dc.title | Sulfonating of 1,4-diaminoanthraquinone leuco by chlorosulfonic acid: Kinetic and process intensification | en_US |
dc.type | Article | en_US |
Appears in Collections: | School of Engineering |
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