Producing triacetylglycerol with glycerol by two steps: Esterification and acetylation

Liao, Xiaoyuan; Zhu, Yulei; Wang, Shengguang; Li, Yongwang

doi:10.1016/j.fuproc.2009.03.015

Cited by 170 publications

(111 citation statements)

References 13 publications

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“…However, with a further increase in the loading amount, the conversion has no significant difference. The rational reason is due to the rise of mixing problem (oil/MeOH/catalyst) and the resistance of mass transfer [19]. Under present reaction conditions, the optimal catalyst amount is 5wt%.…”

Section: B Transesterification Reaction Condition Optimizationmentioning

confidence: 98%

Application of Peanut Husk Ash as a Low-Cost Solid Catalyst for Biodiesel Production

Dai¹,

Chen²,

Wang³

et al. 2014

IJCEA

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Section: B Transesterification Reaction Condition Optimizationmentioning

confidence: 98%

Application of Peanut Husk Ash as a Low-Cost Solid Catalyst for Biodiesel Production

Dai¹,

Chen²,

Wang³

et al. 2014

IJCEA

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“…Çalışmada gliserinin asetik asitle esterleşme reaksiyonunda dönüşümün %100'e ulaşmasını takiben, triasetin seçiciliğini artırmak için aynı sıcaklıkta (105 o C) asetilasyon reaksiyonu gerçekleştirilmiştir. Triasetin seçiciliği ortama eklenen asetik asit türevi olan asetik anhidritle ani bir artışla %100 e ulaşmıştır [2].…”

Section: şEkil 1 Gliserinin Asetik Asitle Esterleşme Reaksiyonu (Estunclassified

“…Triasetin, triasetilat türevleri olarak bilinir ve kozmetikten yakıt katkısına kadar geniş bir uygulama alanına sahiptir. Monoasetin ve diasetin ise kriyojenide ve biyolojik olarak parçalanabilen polyester üretiminde hammadde olarak kullanılırlar [2]. Monoasetin ayrıca gıda ve ilaç sanayinde de kullanılmaktadır [3,4].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Bi̇yodi̇zel Yan Ürünü Gli̇seri̇ni̇n Esterleşme Ve Aseti̇lasyonu İle Değerli̇ Ki̇myasallarin Üreti̇mi̇

Ekinci¹,

Gündüz²,

Oktar³

2015

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETÇevreci bir yakıt olan biyodizel çeşitli avantajlarından ötürü dizel yakıta alternatif bir yakıttır. Bitkisel yağın metanol veya etanol ile transesterleşmesiyle biyodizel üretilmekte ve yan ürün olarak önemli miktarda gliserin oluşmaktadır. Gliserinin asetik asitle esterleşmesi biyodizel üretiminden kaynaklanan artan gliserinin değerlendirilmesi açısından alternatif bir çözüm teşkil eder. Yapılan çalışmada gliserinin asetik asitle esterleşme reaksiyonu Smopex-101 varlığında sıvı faz kesikli otoklav reaktörde incelenmiştir. Yapılan reaksiyon çalışmalarında oda sıcaklığında oldukça kısa sürede (25 dakika) %100 gliserin dönüşümüne ulaşılmıştır. Reaksiyon sıcaklığı ve başlangıç reaktan molar oranlarının gliserin dönüşümü ve ürün seçiciliği açısından etkisi incelenmiştir. En yüksek diasetin (%77) ve triasetin (%23) seçiciliğine 363K'de ve gliserin/asetik asit;1/12 molar oranında ulaşılmıştır. Triasetin seçiciliğini artırmaya yönelik asetil klorür ile Smopex-101 varlığında asetilasyon reaksiyonu gerçekleştirimiştir. Oda sıcaklığında gerçekleştirilen çalışmalarda 1200 dakika sonunda %60 triasetin seçiciliğine ulaşılmıştır.Anahtar Kelimeler: Smopex-101, gliserin, esterleşme, asetilasyon PRODUCTION OF VALUABLE CHEMICALS VIA ESTERIFICATION AND ACETYLATION OF GLYCEROL, BY-PRODUCT OF BIODIESEL ABSTRACTBiodiesel is an alternative fuel to gasoline due to its environmental and economical benefits. Glycerol is the main by-product of the biodiesel production by transesterification of vegetable oil with methanol or ethanol. The esterification of glycerol with acetic acid can be a good choice for utilization of by-product glycerol. In this work esterification of glycerol with acetic acid was performed in liquid phase autoclave batch reactor in the presence of Smopex-101. Complete glycerol conversion was achieved in the reaction studies even at room temperatures. Effects of reaction temperatures and initial reactant molar ratios on the glycerol conversions and product selectivity were also investigated. The maximum diacetin (77 %) and triacetin (23 %) selectivities were achieved at 363 K and glycerol/acetic acid; 1/12 molar ratio. Acetylation reactions were performed with acetyl chloride in the presence of Smopex-101 in order to increase triacetin selectivity. 66 % triacetin selectivity was achieved in acetylation reaction studies in a period of 1200 minutes at room temperature.

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“…Even an increase of the catalyst concentration from 5 to 10 mol/mol% (data not shown) did not change significantly the final yields. On the other hand, it should be noted that in the conventional esterification of glycerol with acetic acid, the selectivity towards TAG is even lower, being comprised between 30% and 40% [2,8]. Complete DAG conversion into TAG is prevented because these types of esterification may be considered a typical equilibrium limited reactions [20].…”

Section: Homogenous Acid Catalysismentioning

confidence: 99%

“…The direct esterification with organic acids (such as acetic acid) in the presence of acid catalysts (including sulphonic resin and zeolites) is one of the most used methodologies [7,8]. All these approaches are based on the availability of pure glycerol, which has to be independently isolated and purified from the FAME synthesis, a step that, actually, is a common side route of FAME industrial production.…”

Section: Introductionmentioning

confidence: 99%

Co-production of butyrate methyl ester and triacetylglycerol from tributyrin and methyl acetate

Battistel

Calaprice

Gualdi

et al. 2011

Applied Catalysis A: General

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a b s t r a c tThe simultaneous synthesis of butyric acid methyl ester, the shortest component of the FAME (fatty acid methyl esters) family, and glycerol triacetate (TAG) from glycerol tributyrate (tributyrin) and methyl acetate was studied as a function of several reaction parameters, such as type of catalyst, temperature and products distribution. The reaction is an interesterification, a multistep consecutive ester interchange catalyzed by either acid or base catalyst. Under optimized conditions, a complete tributyrin conversion and an almost quantitative butyric acid methyl ester accumulation were achieved. The other reaction product, TAG, formed by the complete acetylation of the glycerol moiety, reached almost 70% yield, whereas the mono-and di-acetylated intermediates accumulated in the order of 5-8% and 24-27%, respectively. Similar final conversions and products yields were obtained with either acid or base homogeneous catalysts, suggesting that the final products mixture did not depend on the type of catalysis but might be limited by equilibrium conditions. In spite of similar final yields, base catalysis needed shorter reaction times (minutes instead of hours) and lower temperature (60 • C instead of 130 • C) with respect to the best acid catalyst. On the other hand, unlike heterogeneous basic catalysts, which showed low activity, a heterogeneous acid catalyst almost as active as the homogenous counterpart was found.

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Producing triacetylglycerol with glycerol by two steps: Esterification and acetylation

Cited by 170 publications

References 13 publications

Application of Peanut Husk Ash as a Low-Cost Solid Catalyst for Biodiesel Production

Application of Peanut Husk Ash as a Low-Cost Solid Catalyst for Biodiesel Production

Bi̇yodi̇zel Yan Ürünü Gli̇seri̇ni̇n Esterleşme Ve Aseti̇lasyonu İle Değerli̇ Ki̇myasallarin Üreti̇mi̇

Co-production of butyrate methyl ester and triacetylglycerol from tributyrin and methyl acetate

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