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首页> 外文会议>International Symposium on Supercritical Fluids Tome 1: Natural Products, Process amp; Equipment Development; 20030428-20030430; Versailles; FR >CONCENTRATION OF MINOR COMPONENTS IN CRUDE PALM OIL
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CONCENTRATION OF MINOR COMPONENTS IN CRUDE PALM OIL

机译：棕榈油中微量成分的浓度

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摘要

This study deals with the enrichment of minor constituents from crude palm oil with supercritical CO_2. Direct extraction of carotene using CO_2 is not very practical, so the main component of crude palm oil, triglyceride, has to be esterified. Fatly acid ester has a solubility magnitudes higher than triglyceride in CO_2. The beginning material is crude palm oil, which has a concentration of free fatty acid up to 4%, 600 ppm tocochromanols and 500 ppm carotene, The free fatty acid was first separated, and the crude palm oil was then esterified to fatty ester methyl esters(FAME) with methanol using base catalyst. Afterwards, the glyceroi was separated and the product is washed with water to remove catalyst and methanol. In a pilot countercurrent extraction apparatus, which was built according to the mixer settler principle, fatty acid methyl esters were extracted at 60℃ and 140 bar. At these operating conditions, the CO_2 has a loading around 3 wt%. The apparatus is operated with a CO_2 flow rate of 20 kg/h. With two steps of extraction, an enrichment of up to 100 times was found.
机译：这项研究涉及使用超临界CO_2富集粗棕榈油中的微量成分。使用CO_2直接提取胡萝卜素不是很实际，因此必须将粗棕榈油的主要成分甘油三酸酯酯化。脂肪酸酯在CO_2中的溶解度高于甘油三酸酯。起始原料为粗棕榈油，其游离脂肪酸的浓度最高为4％，生育酚铬色素的含量为600 ppm，胡萝卜素的含量为500 ppm，首先分离出游离脂肪酸，然后将粗棕榈油酯化为脂肪酯甲酯（FAME）与甲醇一起使用的是碱性催化剂。然后，分离甘油，并用水洗涤产物以除去催化剂和甲醇。在根据混合沉降器原理建造的中试逆流萃取设备中，在60℃和140 bar下萃取脂肪酸甲酯。在这些操作条件下，CO_2的负载量约为3 wt％。该设备以20 kg / h的CO_2流速运行。通过两步提取，发现富集高达100倍。

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