Optimal design of extractive distillation for acetic acid dehydration with N-methyl acetamide

You, Xinqiang; Gu, Jinglian; Peng, Changjun; Rodríguez-Donis, Ivonne; Liu, Honglai

doi:10.1016/j.cep.2017.07.025

Cited by 16 publications

(12 citation statements)

References 23 publications

(19 reference statements)

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“…Concentrated AA can then be stored for further application, while the water is recycled back into the system. The distillation scheme used in the analysis was based on the work of You et al 32 and is depicted in Fig. 2 .…”

Section: Process Descriptionmentioning

confidence: 99%

Microbial electrosynthesis: is it sustainable for bioproduction of acetic acid?

et al. 2021

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Section: Process Descriptionmentioning

confidence: 99%

Microbial electrosynthesis: is it sustainable for bioproduction of acetic acid?

et al. 2021

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“…Recently Luyben (2018a) added an economizer to reduce the reboiler duty in the extractive column. It modifies the feed vapour content, but Luyben noticed that it also induced perturbations especially when higher pressures were used to reduce the entrainer-feed ratio for the extractive distillation process for recovering methanol from acetone with chlorobenzene studied by Luyben (2008b) and You et al (2017a). The alternative control structure (Fig.…”

Section: 4mentioning

confidence: 99%

“…Regarding the common choice of operating the columns at atmospheric pressure, some recent publications have shown that the operating pressure should be optimized as well (You et al, 2015a(You et al, ,b, 2016a(You et al, , 2017aLuyben, 2016b;Luyben, 2018a). Care must be taken when lowering the pressure because it might reduce the extractive distillation column temperature in the condenser below what is suitable for using cheap cooling water (You et al, 2015a).…”

Section: Solving Strategiesmentioning

confidence: 99%

“…By changing the pressure, azeotropes and isovolatility lines may move, new azeotropes may appear, and existing ones may disappear. Both increasing or decreasing the pressure have been found beneficial for the separation (You et al, 2015a;Skiborowski et al, 2015;Luyben 2016b;You et al, 2017a;Zhang et al, 2018a;Luyben, 2018a). The choice of entrainer will influence the extent of heat integration of the columns, as it governs the temperatures in the columns.…”

Section: Heat Integrated Extractive Distillationmentioning

confidence: 99%

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Review of extractive distillation. Process design, operation, optimization and control

Gerbaud

Rodríguez-Donis

Hégely

et al. 2019

Chemical Engineering Research and Design

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181

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Operation and control Extractive distillation processes enable the separation of non-ideal mixtures, including minimum or maximum boiling azeotropes and low relative volatility mixtures. Unlike azeotropic distillation, the entrainer fed at another location than the main mixture induces an extractive section within the column. A general feasibility criterion shows that intermediate and light entrainers and heterogeneous entrainers are suitable along common heavy entrainers. Entrainer selection rules rely upon selectivity ratios and residue curve map (rcm) topology including univolatility curves. For each type of entrainer, we define extractive separation classes that summarize feasibility regions, achievable products and entrainer-feed flow rate ratio limits. Case studies are listed as Supplementary materials. Depending on the separation class, a direct or an indirect split column configuration will allow to obtain a distillate product or a bottom product, which is usually a saddle point of rcm. Batch and continuous process operations differ mainly by the feasible ranges for the entrainer-feed flow rate ratio and reflux ratio. The batch process is feasible under total reflux and can orient the still path by changing the reflux policy. Optimisation of the extractive process must systematically consider the extractive column along with the entrainer regeneration column that requires energy and may limit the product purity in the extractive column through recycle. For the sake of reducing the energy cost and the total cost, pressure change can be beneficial as it affects volatility, or new process structures can be devised, namely heat integrated extractive distillation, extractive divided wall column or processes with preconcentrator.

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“…Kadar kalsium oksalat di dalam umbi kimpul dapat diturunkan salah satunya dengan penggunaan asam. Pada penelitian ini asam yang digunakan adalah asam asetat yang merupakan golongan asam lemah artinya hanya terdisosiasi sebagian menjadi ion H + dan CH3COO - (Partridge, 1931;PubChem, 2017;You et al, 2017). Menurut penelitian Mayasari (2010), menggunakan larutan asam sitrat 0.3 M untuk mereduksi kandungan oksalat yang ada di dalam umbi talas mencapai 78.79%.…”

Section: Pendahuluanunclassified

Decrease of Oxalate on Construction Process of New Cocoyam (Xanthosoma Sagittifolium) in Various Consentration of Acetic Acid

Agustin

Estiasih²,

Krisna³

2017

JTP

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ABSTRAKReduksi oksalat pada tanaman umbi-umbian sangat diperlukan terutama senyawa oksalat pada umbi kimpul yang seringkali menyebabkan rasa gatal pada rongga mulut dan tenggorokan saat dikonsumsi. Reduksi oksalat metode kimiawi yang sering digunakan adalah menggunakan asam kuat (HCl). Asam oksalat bersifat larut dalam air, sementara kalsium oksalat tidak larut dalam air tetapi larut dalam asam kuat. Penggunaan HCl menimbulkan rasa dan bau asam yang sangat kuat, sehingga diperlukan metode lain yaitu dengan menggunakan golongan asam lemah yang aman untuk dikonsumsi lebih lanjut, yaitu asam asetat. Tujuan penelitian ini adalah untuk mengetahui proporsi terbaik dalam menurunkan kadar kalsium oksalat pada umbi kimpul segar. Penelitian ini menggunakan rancangan percobaan Rancangan Acak Kelompok (RAK) faktorial yang terdiri dari 2 faktor, faktor I adalah konsentrasi asam asetat dalam 3 level (10%, 15%, dan 20%), serta faktor II adalah lama perendaman dalam 3 level (10 menit, 20 menit, dan 30 menit). Hasil penelitian menunjukkan bahwa perlakuan asam asetat dan lama perendaman dapat menurunkan kadar total oksalat pada umbi kimpul segar. Kadar total oksalat setelah perlakuan perendaman larutan asam asetat dapat menurunkan kadar total oksalat hingga 66% yaitu sebesar 443 mg/100 g. Hal ini didukung dengan hasil analisa karakteristik umbi kimpul yang diperoleh yaitu kadar air 59.51%, kadar abu 1.36%, kadar lemak 0.19%, kadar protein 2.28%, kadar karbohidrat 35.66%, kadar oksalat 1.313 mg/100 g, dan komposisi unsur kalsium oksalat pada umbi kimpul dengan perlakuan perendaman larutan asam asetat pada C sebesar 48.30%, O sebesar 49.59%, Ca sebesar 01.45%. Hasil analisa SEM didapatkan kalsium oksalat berbentuk jarum (raphide) dengan ukuran 3.944-11.47 μm ABSTRACT Oxalate reduction in tuber crops is necessary, especially oxalic compounds which cause itching in the oral cavity and throat. To reduce the oxalate, the commonly used method is chemical using strong acid (HCl). Oxalic acid is soluble in water, while calcium oxalate is insoluble in water, but dissolves in strong acids. The application of HCl cause a strong taste and smell of acids, so it takes other method in by using acetic acid. The purpose of this study was to determine the best proportion in decreasing calcium oxalate levels in cocoyam tubers. This study used a factorial Randomized Block Design (RBD) design consisting of 2 factors, factor I, was acetic acid concentration in 3 levels (10%, 15%, and 20%) and factor II, was soaking duration in 3 levels (10 minutes, 20 minutes, and 30 minutes). The results showed that the treatment of acetic acid and soaking time decrease the oxalate content in cocoyam tubers. Calcium oxalate level after treatment of soaking acetic acid solution decrease the calcium oxalate level up to 66% that is equal to 443 mg/100 g. Supported result of characteristic analysis of cocoyam tuber obtained such as water content 59.51%, ash content 1.36%, fat content 0.19%, protein content 2.28%, carbohydrate 35.66%, and calcium oxalate 1.313 mg/100 g, an...

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Optimal design of extractive distillation for acetic acid dehydration with N-methyl acetamide

Cited by 16 publications

References 23 publications

Microbial electrosynthesis: is it sustainable for bioproduction of acetic acid?

Microbial electrosynthesis: is it sustainable for bioproduction of acetic acid?

Review of extractive distillation. Process design, operation, optimization and control

Decrease of Oxalate on Construction Process of New Cocoyam (Xanthosoma Sagittifolium) in Various Consentration of Acetic Acid

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