Removal of acetic acid from aqueous solutions containing succinic acid and acetic acid by tri-n-octylamine

Hong, Yeon Ki; Hong, Won Hi

doi:10.1016/j.seppur.2004.03.015

Cited by 91 publications

(74 citation statements)

References 12 publications

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“…The hydrogenation data show that acids cannot be hydrogenated under the conditions studied; therefore, the acids should either be separated or neutralised prior to the reaction to prevent catalyst dissolution. The acid separation can be performed using ion exchange resins without the water separation stage [8,16,68,69]. In this study, however, a simpler and more scalable approach was chosen -neutralisation with chalk (CaCO3), which increased the pH of the reaction mixture from 3.0 to a final value of 6.0.…”

Section: Effect Of Ph On the Reaction Ratesmentioning

confidence: 99%

Hydrogenation of bio-oil into higher alcohols over Ru/Fe3O4-SiO2 catalysts

Cherkasov

Jadvani

Mann

et al. 2017

Fuel Processing Technology

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Permanent WRAP URL:http://wrap.warwick.ac.uk/91922 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. AbstractLiquid-phase hydrogenation of a solution of furfural, phenol and acetic acid has been studied in the 50-235 o C range over magnetic Ru/Fe3O4-SiO2 catalyst targeting the renewable production of second generation biofuels with minimum hydrogen consumption.Phenol was fully hydrogenated to cyclohexanol in the entire temperature range. Below 150 o C, furfural was mainly hydrogenated to tetrahydrofurfuryl alcohol while hydrogenolysis to cyclopentanol was the main reaction pathway above 200 o C. The hydrogenation rate was doubled in an acidic solution (pH=3) as compared to that at a pH 6. The spent catalyst was regenerated and reused in subsequent catalytic runs.

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Section: Effect Of Ph On the Reaction Ratesmentioning

confidence: 99%

Hydrogenation of bio-oil into higher alcohols over Ru/Fe3O4-SiO2 catalysts

Cherkasov

Jadvani

Mann

et al. 2017

Fuel Processing Technology

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“…For industrial applications, the acid introduced can be separated using conventional techniques as fractionation. Alternatively, in-flow separation can be performed using ion-exchange resins at the cost of below $2 per kg of MBY feed [77][78][79][80]. The MBY conversion decreased by about 0.1 % per hour and this deactivation did not depend on the acidity of the feedstock.…”

mentioning

confidence: 99%

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Cherkasov

Ibhadon

Rebrov

2016

Applied Catalysis A: General

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“…Marinova et al (2004) melakukan penelitian tentang pengambilan asam tartrat dari limbah industri anggur dengan menggunakan solven TOA, tributylphosphate (TBP) dan decanol, dodecane sebagai solven campuran pada berbagai perbandingan. Penelitian lain juga telah dilakukan seperti penentuan koefisien partisi dari ekstraksi asam sitrat, asam asetat, dan asam oksalat dengan menggunakan extracting power TOA dan berbagai solven yaitu toluene, methylisobutylketone, dan chloroform 1998a;1998b;Schunk et al, 2004); pemungutan kembali (recovery) asam tartrat dengan TOA dalam diluen biner (Yankov et al, 1999); kajian pengaruh asam-asam anorganik dan garam-garam natrium (Ingale and Mahajani, 1996); kajian pH (Tomovska et al, 1999;Choudhury et al, 1998;Hong, 2005). Pengaruh solven TOA, di(2-ethylhexyl) phosphoric acid dan xylene pada ekstraksi asam laktat serta pengaruh komposisi fase organik dan temperatur telah diteliti oleh Juang and Huang (1997) sedangkan campuran ekstraktan TOA, Aliquat 336 dan 1-decanol dikaji oleh Kyuchoukov et al (2001).…”

Section: Pendahuluanunclassified

“…Ikatan hidrogen antar senyawa amin, asam maupun antara amin dan asam tergolong ikatan hidrogen yang kuat (Burrel, 1955). Hal ini juga ditunjukkan terbentuknya ikatan baru yang lebih kuat yang berupa ikatan hidrogen maupun ikatan ion antara asam dan solven (acid-solvent) yang ditandai dengan melarutnya solute (asam-asam) ke dalam solven (Hong and Hong, 2005).…”

Section: Solvenunclassified

Ekstraksi Asam Sitrat Dan Asam Oksalat : Pengaruh Trioctylamine Sebagai Extracting Power Dalam Berbagai Solven Campuran Terhadap Koefisien Distribusi

Kasmiyatun¹,

Jos²

2008

Reaktor

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Generally, liquid waste of citric acid industry containing a highly citric acid, oxalic acid, due to precipitation process of calcium citrate less completely. Liquid-liquid extraction process is this one alternative that used to recover citric acid and oxalic acid, either in the product separation process from the fermentor or the treatment of its liquid waste. In order to understand, that the extraction process can be applied both technically and economically, it needs a more study the extraction parameters. The investigation has carried out about study of the extraction of citric acid and oxalic acid used trioctyl-amine as extracting power on various mix solvent and its ratio, related to the distribution coefficient. Extraction used a separating funnel that it was shaked with using an automatic shaker, which adjusted on specific velocity during 2.5 hours. The rafinate and extract were separated by separating funnel, then they were analyzed both concentration of citric acid and oxalic acid using a high performance liquid chromatography (HPLC). The results of the research show that the mixed solvent (consist of 15% trioctyl amine, 70% dodecane, and 15% hexanol), for the extraction of citric acid produce both the highest distribution coefficient and percentage of separation were 1.15 and 74.22%, respectively; and this were achieved for the ratio between the solvent and diluent of 2.5:1. For the extraction of oxalic acid similar result were obtained, and the value were 3.78 and 88.31%, respectively, for the ratio between solvent and diluent of 2:1.Limbah cair pabrik asam sitrat pada umumnya mengandung asam sitrat, asam oksalat, cukup tinggi akibat proses pengendapan calsium sitrat yang kurang sempurna. Proses ekstraksi cair-cair adalah salah satu alternatif yang dapat digunakan untuk pengambilan kembali asam sitrat dan asam oksalat, baik pada proses pemisahan produk yang keluar dari fermentor maupun pada proses pengolahan limbah cairnya. Untuk mengetahui apakah proses ekstraksi dapat diterapkan secara teknis, maka perlu dilakukan pengkajian lebih mendalam parameter-parameter ekstraksi. Pada penelitian ini telah dilakukan pengkajian tentang ekstraksi asam sitrat dan asam oksalat dengan menggunakan trioctylamine sebagai extracting power pada bermacam solven campuran dan pada berbagai perbandingan, hubungannya dengan koefisien distribusinya. Ekstraksi pada berbagai kondisi rancangan percobaan dilakukan pada corong pemisah, yang penggojokannya dilakukan dengan bantuan automatic shaker yang di set pada kecepatan tertentu selama 2,5 jam. Rafinat dan ekstrak dipisahkan selanjutnya dianalisis kadar asam sitrat maupun asam oksalat dengan menggunakan HPLC. Hasil penelitian menunjukkan bahwa solven campuran (yang terdiri dari 15% trioctylamine, 70% dodecane dan 15% hexanol) menghasilkan koefisien distribusi dan persentase pemisahan solute berturut-turut untuk asam sitrat 1,15 dan 74,22% pada perbandingan solven dan diluen 2,5:1; sedang untuk ekstraksi asam oksalat sebesar 3,78 dan 88,31% pada perbandingan solven dan diluen 2:1.

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Removal of acetic acid from aqueous solutions containing succinic acid and acetic acid by tri-n-octylamine

Cited by 91 publications

References 12 publications

Hydrogenation of bio-oil into higher alcohols over Ru/Fe3O4-SiO2 catalysts

Hydrogenation of bio-oil into higher alcohols over Ru/Fe3O4-SiO2 catalysts

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

Ekstraksi Asam Sitrat Dan Asam Oksalat : Pengaruh Trioctylamine Sebagai Extracting Power Dalam Berbagai Solven Campuran Terhadap Koefisien Distribusi

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