Preparation of monoglycerides by guanidine‐catalyzed processes

Aguiar, Leila M.G.; Vargas, Rogério Matheus

doi:10.1007/s11746-998-0221-6

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…Presently, heterogeneous catalysis has been studied extensively in methanolysis reaction for biodiesel production and in glycerolysis of fatty methyl esters reaction for MAG production . To our knowledge, the application of immobilized catalyst in glycerolysis of TAG reaction (glycerol and TAG as reactants) at low temperatures (<100°C) has been rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Low‐temperature chemical glycerolysis to produce diacylglycerols by heterogeneous base catalyst

Zhong

Deng

Huang

et al. 2014

Euro J Lipid Sci & Tech

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The present study aimed to develop a heterogeneous catalysis process for diacylglycerols (DAG) production through low-temperature chemical glycerolysis. Of the heterogeneous catalysts evaluated, MgO-supported KOH (KOH-MgO) was found effective for the low-temperature chemical glycerolysis, and the KOH-MgO was characterized by FT-IR and powder XRD. Reaction temperature was of paramount importance and 80°C was found necessary to enhance the present reaction. Molar ratio of oil to glycerol at stoichiometric ratio (2:1) gave more DAG formation. 41.8 AE 0.8 wt% of DAG was obtained under these conditions: KOH-MgO concentration 4.5 wt% based on oil, acetone dosage 3:1 (acetone to oil in weight ratio), molar ratio of oil to glycerol 2:1, reaction temperature 80°C and time 12 h.Practical applications: Heterogeneous catalysis has been recognized as green process, it is advantageous over the homogeneous catalysis in terms of separation and reusability of catalysts. The MgO-supported KOH catalyst described in this study can effectively catalyze the low-temperature chemical glycerolysis, it could be considered for practical applications.

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Section: Introductionmentioning

confidence: 99%

Low‐temperature chemical glycerolysis to produce diacylglycerols by heterogeneous base catalyst

Zhong

Deng

Huang

et al. 2014

Euro J Lipid Sci & Tech

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“…The regioselective opening of the ring may be catalyzed by a number of metal alkoxides [12,13] of which tetraisopropoxy titanate appears to be the most efficient. Catalysis with tertiary amines, ammonium salts, and alkyl guanidines [14][15][16] was also employed. The mentioned procedures are universal and make the preparation of virtually any 1-MAG possible.…”

Section: Introductionmentioning

confidence: 99%

Preparation of 1-monoacyIgIyceroIs from gIycidoI and fatty acids cataIyzed by the chromium(III)-fatty acid system

Janiš¹,

Krejčí²,

Klásek³

2000

Eur. J. Lipid Sci. Technol.

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A description is given for preparing 1‐monoacylglycerols by the reaction of fatty acids with glycidol catalyzed by Cr(III)‐fatty acid complexes. These complexes were found to possess catalytic efficiency substantially greater than catalysts employed earlier. Effects of catalyst type, its content in the mixture, molar ratio of reactants, and reaction temperature during the course of acid conversion were studied. With a catalyst content of 0.5% by mass of charged reactants and at 90 °C a 90— 95% conversion of the acid can be achieved within 60 min. In addition to the corresponding 1‐monoacylglycerol, only unreacted starting substances and the catalyst were detected in resulting reaction mixtures.

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“…Corma et al have successfully synthesized of monoacylglycerol using MgO as a catalyst and this reaction gives 65 35 . The utilization of the alkyl guanidine compound as a catalyst for synthesizing of monoacylglycerol has been carried out by Aguiar et al 36 . Monostearin that is product reaction gives a low yield of about 10 .…”

Section: Glycerolysis Of Vegetable Oil 311 Chemical-catalyzed Glycementioning

confidence: 99%

Preparation of Fatty Acid and Monoglyceride from Vegetable Oil

et al. 2020

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Introduction Fatty acids and monoglycerides are two groups of lipid compounds that can be produced from vegetable oils or animal fats. Vegetable oil is a triglyceride compound, also known as triacylglycerol or glycerol triester, with the acyl group that comes from a fatty acid. The type of vegetable oil is determined by the kind of fatty acid that is bound to triglycerides. Triglycerides of vegetable oils comprises of certain major fatty acids with some other minor fatty acids. For example, the coconut oil Cocos nucifera L. , the castor oil Ricinus communis L. , the olive oil, the sunflower oil, the palm oil contains 54 lauric acid 1 , 93 ricinoleic acid 2 , oleic acids 3 , oleic and linoleic acid 4 and palmitic acid 5 , respectively. Some types of fatty acids such as EPA and DHA have essential functions in health such as reducing coronary heart disease risk factors, preventing certain cancers and im

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Preparation of monoglycerides by guanidine‐catalyzed processes

Cited by 9 publications

References 9 publications

Low‐temperature chemical glycerolysis to produce diacylglycerols by heterogeneous base catalyst

Low‐temperature chemical glycerolysis to produce diacylglycerols by heterogeneous base catalyst

Preparation of 1-monoacyIgIyceroIs from gIycidoI and fatty acids cataIyzed by the chromium(III)-fatty acid system

Preparation of Fatty Acid and Monoglyceride from Vegetable Oil

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