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| Influence of oil components on the formation of 3-monochloropropane- 1,2-diol esters and glycidyl esters and speculation about the formation mechanism under the simulated deodorization temperature |
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| DOI： |
| KeyWord:Key words：3-monochloropropane-1,2-diol esters glycidyl esters acylglycerol fatty acid deodorization temperature |
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| Abstract: |
| Abstract：Different acylglycerols such as monoacylglycerol (MAG), 1,2-diacylglycerols (1,2-DAG), 1,3-diacylglycerols (1,3-DAG)and triacylglycerols (TAG) were evaluated for their capacity to react with tetrabutylammonium chloride (TBAC) to form 3-monochloropropane-1,2-diol esters (3-MCPDE) and glycidyl esters (GEs) in n-hexadecane at 240 ℃ for 2 h under nitrogen protection to simulate the deodorization condition, and the effects of free fatty acid on the formation of 3-MCPDE and GEs were also investigated. The results indicated that in the deodorization process, the contents of 3-MCPDE and GEs were positively correlated with the contents of MAG and DAG, and the TAG had no significant effect on 3-MCPDE and GEs. In the MAG system, the contents of 3-MCPDE and GEs were positively correlated with the content of free fatty acids. In the 1,2-DAG and 1,3-DAG systems, the content of free fatty acids had little effect on the contents of 3-MCPDE and GEs, while in the TAG system, the content of free fatty acids basically had no effect on the contents of 3-MCPDE and GEs. In addition to the TAG system, the content of 3-MCPDE in the MAG and DAG systems with fatty acid added were much higher than that without fatty acid. Under the same amount of fatty acid added, the orders of effect of acylglycerol type on 3-MCPDE and GEs were as follows: MAG>1,2-DAG>1,3-DAG>TAG and MAG>1,3-DAG>1,2-DAG>TAG, respectively. |
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