Supercritical carbon dioxide extraction of CLA-ethyl ester

doi:10.1007/s11705-010-0536-3

Front Chem Sci Eng

2011, Vol. 5

Issue (1) : 102-106 https://doi.org/10.1007/s11705-010-0536-3

RESEARCH ARTICLE

Supercritical carbon dioxide extraction of CLA-ethyl ester

Yingdi CHEN^1,2, Peng XU³, Jian CHENG^1,2(

)

1. Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China; 2. Hubei Key Lab of Novel Reactor & Green Chemical Technology, Wuhan Institute of Technology, Wuhan 430073, China; 3. Changling Petrochemical Co. Ltd., SINOPEC, Yueyang 414012, China

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Abstract

Supercritical carbon dioxide (SC-CO₂) extraction of Conjugated linoleic acid (CLA) ethyl ester was investigated at pressures in the range of 9 to 10.5 MPa and temperature gradients ranging from 0°C to 21°C. The content of CLA-ethyl ester in the fraction was analyzed with gas chromatography (GC). The experimental results indicated that the rate of extraction would rise with the increase of pressure when temperature gradient was given. Moreover, the extraction pressure had insignificant influence on the selectivity of CLA-ethyl ester in SC-CO₂. When pressure was fixed, setting certain temperature gradient can improve the selectivity of CLA-ethyl ester in SC-CO₂, and CLA-ethyl ester can be concentrated more effectively than without a temperature gradient. The acid value and peroxide value of the fractions were reduced obviously, compared to the raw material. The optimal condition is pressure at 10 MPa and temperature gradient at 11°C.

Keywords supercritical carbon dioxide extraction CLA-ethyl ester temperature gradient

Corresponding Author(s): CHENG Jian,Email:wuhancengjian@163.com

Issue Date: 05 March 2011

Cite this article:

Peng XU,Jian CHENG,Yingdi CHEN. Supercritical carbon dioxide extraction of CLA-ethyl ester[J]. Front Chem Sci Eng, 2011, 5(1): 102-106.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-010-0536-3
https://academic.hep.com.cn/fcse/EN/Y2011/V5/I1/102

Fig.1 Instrument of SC-CO extraction

Fig.2 Yield of CLA-ethyl ester at different initial pressures

Tab.1 Content of CLA-ethyl ester at different pressures

Fig.3 Yield of ethyl ester at different temperature gradients

Tab.2 Content of CLA-ethyl ester at different temperature gradients

Fig.4 Variety of acid value at different initial pressures

Fig.5 Variety of acid value at different temperature gradients

Fig.6 Variety of peroxide value

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