Advances In The Synthesis Of Glycerides Of Fatty Acids

Hartman, L.

doi:10.1021/cr50023a002

Cited by 38 publications

(17 citation statements)

References 84 publications

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“…The trans-isomers are reported by Hay & Morrison (1970) to consist mainly of the A l l isomer (MP 44 °C) while the cis-isomer is mainly the A9 isomer (MP 10-5 °C). In general, the melting points of iraws-monoene triglycerides are almost as high as those of the corresponding trisaturated glycerides (Hartman, 1958). This accounts for the occurrence of a higher proportion of <rans-octadecenoic acid in the solid than in the liquid fractions and a still higher proportion in the HMGF.…”

Section: Discussionmentioning

confidence: 94%

The chemical composition and physical properties of fractions of milk fat obtained by a commercial fractionation process

Norris¹,

Gray²,

McDowell³

et al. 1971

Journal of Dairy Research

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Samples of liquid and solid fractions obtained by a commercial process from anhydrous milk fat of softening point (s.p.) 33-5-34°C had s.p. values of 22-23 °C and 36-38 °C respectively.Determinations of fatty acid composition by GLC showed that unsaturated and short chain fatty acids were present in increased concentration in the liquid fraction (average 37-8 and 12-4% as compared with 35-1 and 10-8% in the original milk fat) and long chain saturated acids in the solid fraction (average 57-8 as compared with 53-8%). There was some concentration of carotene and vitamin A, and to a lesser extent of cholesterol, in the liquid fraction.Crystallization and melting curves determined by a differential scanning calorimeter (DSC) showed that while the liquid fraction was completely melted at 25 °C, the solid fraction contained an increased proportion of fat melting between 30 and 40 °C. In addition to these high melting triglycerides the solid fraction also contained some 65 % of fat in the liquid phase at the original crystallization temperature of 25 °C.The physical properties of butter and other products consisting mainly of milk fat are dependent on the chemical composition of the fat.

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Section: Discussionmentioning

confidence: 94%

The chemical composition and physical properties of fractions of milk fat obtained by a commercial fractionation process

Norris¹,

Gray²,

McDowell³

et al. 1971

Journal of Dairy Research

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“…A considerable amount of work has been done on the esterification of fatty acids with glycerol (1)(2)(3)(4)(5)(6)(7). In most of these studies, either with (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) or without catalyst (6,8,18,22,23), the conditions necessary to obtain specified partial glycerides in high yield and to reach lower acid values in a reasonable time period were determined. The reaction was also investigated by several researchers with respect to its kinetics.…”

mentioning

confidence: 99%

Esterification of oleic acid with glycerol in the presence of sulfated iron oxide catalyst

Güner

Sirkecioğlu

Yılmaz

et al. 1996

J Americ Oil Chem Soc

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Esterification of oleic acid with glycerol was investigated in view of the reaction kinetics, using "superacidic" sulfated iron oxide catalysts. A series of different sulfate contents were prepared and characterized by a multitude of techniques prior to their use as catalysts. The sulfated iron oxide reaction was carried out with equivalent amounts of reactants in the temperature range of 180-240~ Effects of the sulfate content and the catalyst amount on reaction kinetics at different temperatures were evaluated.1A0C5 73, 347-351 (1996).

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“…Synthesis of monoglycerides is commercially achieved either by glycerolysis of animal and vegetable fats and oils or by direct esterification of glycerol with fatty acids [10]. These catalytic processes require strong base catalysts such as KOH, NaOH or Ca(OH) 2 and lead to the formation of monoglycerides in a limited purity due to the side production of di-, triglycerides and soap.…”

Section: Monoglycerides From Glycerol Via Glycerolysis or Esterificationmentioning

confidence: 99%

Design of new solid catalysts for the selective conversion of glycerol

Barrault

Jérôme

2008

Euro J Lipid Sci & Tech

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Glycerol is now obtained as a co‐product of biodiesel from renewable raw materials with a dramatically increasing production. It follows that one of the most important breakthroughs is to find new catalytic processes for chemical valorizations. The present paper gives a short overview of selective esterification, transesterification or etherification of glycerol via the use of new heterogeneous catalysts. The selectivity control is mainly the result of the synthesis of mesoporous materials for which acidic or basic properties as well as the surface hydrophilic‐lipophilic balance were optimized.

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Advances In The Synthesis Of Glycerides Of Fatty Acids

Cited by 38 publications

References 84 publications

The chemical composition and physical properties of fractions of milk fat obtained by a commercial fractionation process

The chemical composition and physical properties of fractions of milk fat obtained by a commercial fractionation process

Esterification of oleic acid with glycerol in the presence of sulfated iron oxide catalyst

Design of new solid catalysts for the selective conversion of glycerol

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