Hydrolysis of vegetable oils and fats to fatty acids over solid acid catalysts

Satyarthi, Jitendra K.; Srinivas, D.; Ratnasamy, P.

doi:10.1016/j.apcata.2010.03.047

Cited by 93 publications

(83 citation statements)

References 22 publications

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“…These results showed that the limitation step for the hydrolysis of the oil was attributed to the first step (the formation of DAG by the hydrolysis of TAG). Figure 1 also shows that the content of fatty acids in the product sharply increased with the increase in hydrolysis time from 0 to 12 h, and at 24 h, and the hydrolysis reaction reached equilibrium at 24 h. Similar results can also be found in the chemical (Fe-Zn double-metal cyanide)-catalyzed hydrolysis of oil (Satyarthi et al, 2011). a Numbers were run at random.…”

Section: Reaction Progress Of the Hydrolysis Of Phoenixsupporting

confidence: 66%

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Enzymatic production of sterculic acid from the novel Phoenix tree seed oil: Optimization and kinetic study

Hou

Sun

2017

Grasas y Aceites

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SUMMARY:Phoenix tree (Firmiana simplex) seed oil is a novel oil which is rich in sterculic acid. Sterculic acid, a cyclopropene fatty acid, can be used as the inhibitor of the stearoyl-CoA desaturase system and mammary carcinomas growth. In this work, Lipozyme TLIM-catalyzed hydrolysis of the novel Phoenix tree seed oil was used to prepare sterculic acid. High temperature GC-FID and the degree of hydrolysis (DH) were used to monitor the reaction progress. Effects of reaction variables on the hydrolysis were evaluated and optimized using response surface methodology. Results showed that sterculic acid can be successfully prepared from the novel seed oil, and the effect of reaction variables on the hydrolysis decreased in the order of reaction time > enzyme load > temperature. RESUMEN: Producción enzimática de ácido estercúlico a partir del nuevo aceite de semillas del árbol fenix: optimización y estudio cinético. El aceite de semilla del árbol fenix (Firmiana simplex) es un nuevo tipo de aceite rico en ácido estercúlico. Este es un ácido graso ciclopropeno, que se puede utilizar como inhibidor del sistema de estearoyl-CoA desaturasa y del crecimiento de los carcinomas mamarios. En este trabajo, se utilizó la hidrólisis catalizada por Lipozyme TLIM del nuevo aceite de semilla de árbol fenix para preparar ácido estercúlico. Se utilizaron GC-FID a alta temperatura y el grado de hidrólisis (DH) para monitorizar el progreso de la reacción. Los efectos de las variables de reacción de hidrólisis se evaluaron y optimizaron utilizando la metodología de superficie de respuesta. Los resultados mostraron que el ácido estercúlico puede prepararse con éxito a partir del nuevo aceite de semilla, y el efecto de las variables de reacción en la hidrólisis disminuyó en el orden de tiempo de reacción> carga enzimática> temperatura. Se pueden obtener altos rendimientos de ácidos grasos (DH, 98,2 ± 0,8%) en condiciones optimizadas (45 ºC, relación masa de agua a aceite 10: 1, carga enzimática 10% y 18 h). La ecuación de Arrhenius para la hidrólisis fue LnV 0 = 9,12 − 4721/T. La energía de activación fue 39,25KJ/mol. Los valores cinéticos de Vmax, K/m fueron 0,232 mol/(L • min) y 0,084 mol/L, respectivamente. Citation/Cómo citar este artículo: Hou X, Sun S. 2017. Enzymatic production of sterculic acid from the novel Phoenix tree seed oil: Optimization and kinetic study. Grasas Aceites 68 (2), e197. http://dx

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Section: Reaction Progress Of the Hydrolysis Of Phoenixsupporting

confidence: 66%

“…Traditionally, fatty acids can be prepared from natural oils and fats using chemical catalysts (acid or base) (Murty et al, 2002;Satyarthi et al, 2011). However, according to the previous report (Aued-Pimentel et al, 2004), the structure of cyclopropene in sterculic acid can be destroyed by acid.…”

Section: Introductionmentioning

confidence: 99%

Enzymatic production of sterculic acid from the novel Phoenix tree seed oil: Optimization and kinetic study

Hou

Sun

2017

Grasas y Aceites

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“…Nanoscopic ZnO was prepared using Zn(NO 3 ) 2 Á6H 2 O and polyethylene glycol (PEG-4000, Loba Chem.) [34].…”

Section: Catalyst Preparationmentioning

confidence: 95%

Biodiesel Production from Vegetable Oils and Animal Fat over Solid Acid Double-Metal Cyanide Catalysts

Srinivas

Satyarthi

2010

Catal Surv Asia

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Biodiesel comprises of fatty acid alkyl esters prepared from vegetable oils or animal fat by esterification/ transesterification with short-chain alcohols (methanol or ethanol, for example). It is a biodegradable renewable fuel. Its production is growing exponentially due to greater concerns about environmental protection and depletion of fossil fuel resources. Further, its production from nonedible oils and animal fat is more desirable than from edible oils due to lower cost of non-edible feedstocks and elimination of food verses fuel issues. Solid acid catalysts are ideal for conversion of such low-grade oils to biodiesel. Biodiesel from non-edible oils can be produced by two methods: (1) simultaneous esterification of fatty acids and transesterification of fatty acid glycerides and (2) hydrolysis of glycerides followed by esterification. This account reports the catalytic performance of solid, Fe-Zn doublemetal cyanide (DMC) complexes and other acid catalysts in these transformations for biodiesel production. The factors influencing the catalytic performance of the solid acid catalysts in biodiesel production are discussed.

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“…Nas primeiras horas das reações de hidrólise enzimática do óleo de oliva, foi observado o período de indução, o que pode ser atribuído a miscibilidade limitada da água no óleo (Satyarthi, 2011). A reação teve um início lento, e conforme moléculas de DAG e MAG foram formadas, a miscibilidade de água no óleo foi favorecida, promovendo maior contato entre as fases resultando no aumento da velocidade de reação.…”

Section: Efeito Da Concentração De áGuaunclassified

Cinética Enzimática Da Hidrólise Do Óleo De Oliva Em Sistemas Batelada E Batelada Alimentada

Cabral¹,

Corazza²,

Voll³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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RESUMO -O diacilglicerol não é absorvido como gordura, podendo reduzir o teor de gordura no sangue. Desta forma, cresce o interesse na modificação dos óleos e gorduras. Na reação de hidrólise enzimática, a concentração de água é um parâmetro significativo. Assim como uma alta razão de alimentação de água/triacilglicerol é necessária para o deslocamento da reação no sentido dos produtos, o excesso de água causa o efeito de inibição reversível da enzima. O objetivo deste trabalho é avaliar a abordagem batelada alimentada em reação de hidrólise enzimática. Após 24 h de reação em batelada, o maior rendimento em ácidos graxos livres foi obtido com alimentação de 20 %m/m de água. Para menores tempos de reação, maiores rendimentos foram obtidos com apenas 3 %m/m de água. A abordagem batelada alimentada evita que a atividade enzimática seja inibida pelo excesso de água. Um modelo matemático foi ajustado aos dados experimentais, e sua capacidade de estimar perfis de reação foi validada.

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Hydrolysis of vegetable oils and fats to fatty acids over solid acid catalysts

Cited by 93 publications

References 22 publications

Enzymatic production of sterculic acid from the novel Phoenix tree seed oil: Optimization and kinetic study

Enzymatic production of sterculic acid from the novel Phoenix tree seed oil: Optimization and kinetic study

Biodiesel Production from Vegetable Oils and Animal Fat over Solid Acid Double-Metal Cyanide Catalysts

Cinética Enzimática Da Hidrólise Do Óleo De Oliva Em Sistemas Batelada E Batelada Alimentada

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