Design and intensification of industrial DADPM process

Benneker, Anne M.; Ham, Louis G.J. van der; Waele, Bart de; Zeeuw, Arend Jan; Berg, Henk van den

doi:10.1016/j.cep.2016.08.009

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…HCl gas is a byproduct of MDI production, which can be absorbed in water and recycled back to the production of MDA in the form of a solution . The use of HCl solution as a catalyst requires an added neutralization step in the neutralization reaction generating a large amount of brine effluent, which can only be released into the environment under strict conditions and after treatment steps, not to mention the economic impact of the large amount of NaOH solution used . In the case of heterogeneous catalysis, these negative effects do not need to be taken into account and these advantageous properties have put them into the focus of many researches in recent decades.…”

Section: Introductionmentioning

confidence: 99%

“…4 The use of HCl solution as a catalyst requires an added neutralization step in the neutralization reaction generating a large amount of brine effluent, which can only be released into the environment under strict conditions and after treatment steps, not to mention the economic impact of the large amount of NaOH solution used. 5 In the case of heterogeneous catalysis, these negative effects do not need to be taken into account and these advantageous properties have put them into the focus of many researches in recent decades. One of the advantages of heterogeneous catalysis and the driving force for the development of these materials is the reduction of quantities of brine effluents, which also contain aromatic hydrocarbons (hundreds of ppm of aniline, MDA, and other pollutants), depending on their solubility.…”

Section: Introductionmentioning

confidence: 99%

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Exploration and Model-Based Analysis of Reaction Mechanisms Related to the Formation of Methylenedianiline

Horváth

Kummer

Kozár

et al. 2023

Ind. Eng. Chem. Res.

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The synthesis of different isocyanates is a highly energy-intensive and complex process; hence, there is a lot of scope and potential for developing technologies and formulations for sustainable development. However, optimizing the production process requires a model validated with measurement data and describes the real system with sufficient accuracy to achieve significant time and cost savings while improving product quality. Models can support the manufacturing process quickly and accurately, increase the selectivity of products to meet market needs, reduce byproducts and energy consumption, and improve the fluidity of setting key performance indicators (KPIs) to the expected value. Methylenedianiline (MDA) is an intermediate product of the synthesis of methylene diphenyl diisocyanate (MDI), which is formed by a condensation reaction between aniline and formaldehyde in an acidic environment. The conditions of the condensation reaction essentially determine the quantitative and qualitative properties of the final MDI product mixture. The development of a model describing the formation of MDA is therefore considered a critical step. The results show that by increasing the complexity of the model and defining new components and reactions, a better model can be achieved describing the reaction system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%