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| Optimization of enzymatic preparation of cocoa butter equivalent and its property analysis |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.220856 |
| KeyWord:palm oil mid-fraction stearic acid cocoa butter equivalent enzymatic interesterification molecular distillation purification solvent crystallization purification |
| FundProject:国家重点计划项目（2021YFD2100304） |
| Author Name | Affiliation | | YOU Linna1, CHEN Yan1, WANG Xiangyu1, SHANG Gang2, YU Yan3,
LIU Xiang3, JIANG Xin1, SUN Chengguo2, WANG Fengyan1 | (1.Beijing Engineering Laboratory of Geriatric Nutrition Food Research,Beijing Key Laboratory of Nutrition &
Health and Food Safety, COFCO Nutrition and Heath Research Institute Co. ,Ltd. , Beijing 102209, China
2.COFCO Oils R&D Center, Tianjin 300452, China
3.COFCO Eastocean Oils & Grains Industries
(Zhangjiagang) Co. ,Ltd. , Zhangjiagang 215634, Jiangsu, China) |
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| Abstract: |
| In order to prepare the cocoa butter equivalent (CBE) similar to the natural cocoa butter (CB), palm oil mid-fraction and stearic acid were used to prepare CBE through interesterification with Lipozyme RM IM as catalyst in solvent free system. Therewith, molecular distillation and solvent crystallization were employed to purify the reaction product.The single factor experiment was carried out to optimize the process conditions of interesterification reaction,molecular distillation process and solvent crystallization. At the same time, the physicochemical properties and crystallization properties of CBE prepared were analyzed using natural CB as a control.The results showed that the optimal conditions of interesterification reaction were as follows: substrate mass ratio 1∶ 1, enzyme dosage 8%（based on the total mass of the substrates）, reaction temperature 70 ℃, and reaction time 2 h. The optimal molecular distillation process conditions were as follows: distillation temperature 210 ℃, feeding rate 2 mL/min, wiper rotation speed 150 r/min. The optimal conditions for n-hexane solvent crystallization were as follows: crystallization temperature 15 ℃ and crystallization time 18 h. The indexes of CBE prepared under these conditions were basically consistent with those of natural CB, and both showed stable β crystallization trend after temperature regulation. In conclusion, the preparation technology had a favorable prospect in the industrial production of the CBE with the similar characteristics of the natural CB. |
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