Diacylglycerols from butterfat: production by Glycerolysis and short-path diltillation and analysis of physical properties

Yang, Tiankui, Zhang, Hong, Mu, Huiling, Sinclair, Andrew and Xu, Xuebing 2004, Diacylglycerols from butterfat: production by Glycerolysis and short-path diltillation and analysis of physical properties, Journal of the American oil chemists' society, vol. 81, no. 10, pp. 979-987.

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Title Diacylglycerols from butterfat: production by Glycerolysis and short-path diltillation and analysis of physical properties
Author(s) Yang, Tiankui
Zhang, Hong
Mu, Huiling
Sinclair, Andrew
Xu, Xuebing
Journal name Journal of the American oil chemists' society
Volume number 81
Issue number 10
Start page 979
End page 987
Publisher American Oil Chemists' Society
Place of publication Champaign, Ill.
Publication date 2004-10
ISSN 0003-021X
1558-9331
Keyword(s) Acyl migration
butterfat
diacylglycerols
dropping point
DSC
glycerolysis
short-path distillation
solid fat content
thermal behavior
x-ray
Summary The aim of this paper was to develop a process for the production of DAG from butterfat through glycerolysis and short-path distillation and to evaluate the physical properties of the DAG in comparison with the original butterfat. Chemical glycerolysis produced a mixture of acylglycerols containing DAG together with MAG and TAG. From the mixture of glycerolysis products, MAG were removed through three consecutive distillations (vacuum <0.001 mbar) at 150°C. TAG were separated from DAG by distillation at 210°C, which gave a product with more than 80% DAG in the distillates. Distillation temperatures had significant effects on acyl migration. The formation of desirable 1,3-DAG was favored at higher temperatures. Under 210°C distillation, the equilibrium ratio of 6∶4 was obtained between 1,3-DAG and 1,2(2,3)-DAG. The FA profile of the DAG product was relatively similar to the original butterfat. The total DAG recovery was around 77% in the pilot-scale production. The different patterns of m.p. were observed between butterfat and the DAG fraction produced as well as the MAG fraction collected. Solid fat content profiles of the DAG fraction and its mixtures with rapeseed oil possessed trends similar to those of the corresponding butterfat and its mixtures with rapeseed oil. Compared with butterfat, the DAG fraction behaved differently in its thermal profiles, crystallization patterns, and rheological properties; for example, the dropping point was 13°C higher for the latter than for the former, and the crystal pattern was mostly β form for the latter, whereas the former was the β′ form.
Language eng
Field of Research 060199 Biochemistry and Cell Biology not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2004, AOCS Press
Persistent URL http://hdl.handle.net/10536/DRO/DU:30009312

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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