Features of the enzymatic hydrolysis of castor oil

Gamayurova, V. S.; Зиновьева, М. Е.; Tran, Hanh Tm.

doi:10.1134/s2070050413030045

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…According to our studies, the syn thesis of most of the esters catalyzed by lipases of dif ferent origin in organic media requires the excess car rier of the -OH group. This excess apparently protects the enzyme from the adverse effect of organic solvents [6][7][8].…”

Section: Optimizing the Ratio Of Reactantsmentioning

confidence: 99%

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Enzymatic synthesis of polyethylene glycol-400 esters

et al. 2015

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Esters of fatty acids (FAs) and polyethylene glycol 400 (PEG) are valuable chemically derived surfactants. In this work, it is shown that the chemical synthesis of PEG esters can be replaced by enzymatic synthesis under milder conditions and using simpler and more environmentally friendly technology. The main obstacles to enzymatic catalysis in a system of PEG and higher FAs are the high viscosity of the former and the low water solubility of the latter. These problems are solved by selecting organic media and other con ditions of the process mediated by pancreatic lipase. The optimum conditions for the synthesis of PEG esters of FAs are determined: reaction medium, benzene/hexane in a ratio of 2 : 3; optimum temperature, 25°C; water content in the system, no more than 0.2%; FA : PEG molar ratio, 1 : 1.8; reaction time, 48 h. Under these conditions, the yields in synthesizing PEG esters of capric, lauric, and palmitic acids are 80, 78, and 44%, respectively.

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Section: Optimizing the Ratio Of Reactantsmentioning

confidence: 99%

“…The choice of this enzyme was based on it being one of the most extensively studied lipolytic enzymes. It was shown that pancreatic lipase in organic media maintains its enzymatic activity and ensures the high efficiency synthesis of esters and hydrolysis of vegeta ble oils [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Enzymatic synthesis of polyethylene glycol-400 esters

et al. 2015

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“…The broad and versatile use of castor oil comes from its main component, ricinoleic acid (C 18 H 34 O 3 , cis‐12‐hydroxy‐9‐octadecenoic acid), which represents approximately 90% of the triglycerides in castor oil . Therefore, one of the most important trends in the use of castor oil is to obtain ricinoleic acid . The functional groups in ricinoleic acid, namely, hydroxyl group, double bond and carboxyl group, provide reaction sites for the preparation of a variety of useful industrial derivatives .…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Candida rugosa Lipase on Glutaraldehyde‐Activated Fe₃O₄@Chitosan as a Magnetically Separable Catalyst for Hydrolysis of Castor Oil

Zhao

Chen

et al. 2017

Euro J Lipid Sci & Tech

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In this study, the catalyzed hydrolysis of castor oil by Candida rugosa lipase (CRL) immobilized on glutaraldehyde‐activated magnetic Fe3O4@chitosan is investigated. Magnetic Fe3O4 is prepared by hydrothermal method and coated with chitosan (CS). Next, CRL is immobilized on Fe3O4@chitosan using glutaraldehyde as a cross‐linking reagent. The prepared Fe3O4@CS@CRL is confirmed by scanning electron microscopy (SEM), X‐ray powder diffraction (XRD), vibrating sample magnetometry (VSM), Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA). The response surface methodology (RSM) based on the Box–Behnken design is used to evaluate and optimize the hydrolysis reaction variables. The optimum reaction conditions for the hydrolysis of castor oil by the Fe3O4@CS@CRL heterogeneous catalyst are found to be a water/oil ratio of 1.60:1, pH of 7.05, reaction temperature of 34 °C, and lipase concentration of 3.27%; under these conditions, the hydrolysis conversion of castor oil reached 46.81%. Moreover, the immobilized lipase showed high stability with no appreciable loss in its activity after three consecutive cycles. Practical Applications: RSM is found to be a useful technique for optimizing hydrolysis of castor oil. The high conversion of the hydrolysis of castor oil indicates that the Fe3O4@CS@CRL have potential to be used in preparing ricinoleic acid from castor oil. Ricinoleic acid have the potential to be used in printing ink as a pigment and dye disperser, plasticizers, surfactants, lubricants, and other valuable products. Ricinoleic acid can be used in pigment and dye disperser in printing ink, sebacic acid, azelaic acid, heptaldehyde, plasticizers, surfactants, lubricants, and other valuable products. Hydrolysis of castor oil catalyzed by Candida rugosa lipase (CRL) immobilized on glutaraldehyde‐activated magnetic Fe3O4@chitosan is investigated. The response surface methodology (RSM) based on the Box–Behnken design is used to evaluate and optimize the hydrolysis reaction variables. Fe3O4@CS@CRL can be easily separated from the suspension using an external strong magnet. Fe3O4@CS@CRL have potential to be used in preparing ricinoleic acid from castor oil.

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“…By varying the composition of the initial substrates (alcohol and acid), it is possible to synthesize aroma compounds having various odors: for example, isoamyl butyrate smells like a pear [1,2]. There have been reports on the enzymatic esterifica tion of organic (capric, palmitic, lauric, salicylic) acids with aliphatic (isoamyl, cetyl, ethyl) alcohols in nonaqueous media in the presence of lipase [2][3][4][5][6][7]. Nanostructured carbon is synthesized by hydrocar bon pyrolysis on metallic catalysts (Ni, Cu, Fe, and their alloys) supported on an inorganic material [8,9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nanostructured carbon on Ni catalysts supported on mesoporous silica, preparation of carbon-containing adsorbents, and preparation and study of lipase-active biocatalysts

et al. 2016

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This work continues a series of our studies on the synthesis of nanostructured carbon (NSC) by the pyrolysis of H 2 + C 3 -C 4 alkane mixtures on nickel and cobalt metal catalysts supported on chemically diverse inorganic materials (aluminosilicates, alumina, carbon) having different textural characteristics (mesoporous and macroporous supports) and shapes (granules, foamed materials, and honeycomb mono liths). Here, we consider Ni catalysts supported on granular mesoporous silica (SiO 2 ). It has been elucidated how the yield of synthesized carbon depends on the Ni/SiO 2 catalyst preparation method (homogeneous pre cipitation or impregnation) and on the composition of the impregnating solution, including the molar ratio of its components-nickel nitrate and urea. The morphology of catalytic NSC and Ni distribution in the sil ica granule have been investigated using a scanning electron microscope with an EDX analyzer. Carbon con taining composite supports (NSC/SiO 2 ) have been employed as adsorbents for immobilizing microbial lipase. The enzymatic activity and stability of the resulting biocatalysts have been estimated in transesterifi cation reactions of vegetable (sunflower and linseed) oils involving methyl or ethyl acetate, esterification, and synthesis of capric acid-isoamyl alcohol esters in nonaqueous media.

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Features of the enzymatic hydrolysis of castor oil

Cited by 12 publications

References 3 publications

Enzymatic synthesis of polyethylene glycol-400 esters

Enzymatic synthesis of polyethylene glycol-400 esters

Immobilization of Candida rugosa Lipase on Glutaraldehyde‐Activated Fe₃O₄@Chitosan as a Magnetically Separable Catalyst for Hydrolysis of Castor Oil

Synthesis of nanostructured carbon on Ni catalysts supported on mesoporous silica, preparation of carbon-containing adsorbents, and preparation and study of lipase-active biocatalysts

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Features of the enzymatic hydrolysis of castor oil

Cited by 12 publications

References 3 publications

Enzymatic synthesis of polyethylene glycol-400 esters

Enzymatic synthesis of polyethylene glycol-400 esters

Immobilization of Candida rugosa Lipase on Glutaraldehyde‐Activated Fe3O4@Chitosan as a Magnetically Separable Catalyst for Hydrolysis of Castor Oil

Synthesis of nanostructured carbon on Ni catalysts supported on mesoporous silica, preparation of carbon-containing adsorbents, and preparation and study of lipase-active biocatalysts

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Immobilization of Candida rugosa Lipase on Glutaraldehyde‐Activated Fe₃O₄@Chitosan as a Magnetically Separable Catalyst for Hydrolysis of Castor Oil