期刊
PROCESS BIOCHEMISTRY
卷 54, 期 -, 页码 89-95出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.procbio.2016.12.015
关键词
Medium and long chain triacylglycerols; Medium chain fatty acids; Biocatalyst; Interesterification; Chinese national standard
资金
- Natural Science Foundation of Jiangsu Province [BK20150137]
- Program of Science and Technology Department of Jiangsu Province [BY2016022-33]
Synthesis of medium and long chain triacylglycerols (MLCTs) by lipase-catalyzed interesterification of soybean oil with medium chain triacylglycerols (MCTs) in a solvent-free system is investigated in this study. Firstly, reaction conditions of the interesterification were optimized. Under the optimum conditions (Lipozyme 435 of 8% as catalyst, substrate ratio of 40:60, heating temperature of 90 degrees C, reaction time of 6 h), MLCTs were obtained in a 74.9% yield Secondly, a two-step purification was conducted to reduce acid, peroxide values and diacylglycerol content to acceptable levels. After the deacidification by the neutralization and silica gel absorption, acid, peroxide values and diacylglycerol content Were reduced to 0.14 mg/g, 1.5 mmol/kg and 1.2%, respectively. The determined levels of physicochemical parameters of purified MLCTs fell within the permitted ranges of the Chinese national standard specification for MLCTs. After a two-step purification, a qualified product was produced and can be used in pharmaceutical industry as a component of fat emulsion injection. The process for the preparation of MLCTs is scalable. Differently from previous studies, the aim of this study is to obtain MLCTs products meeting the national standard JX20070100 for structured triacylglycerols.(C) 2016 Elsevier Ltd. All rights reserved.
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