Preparation of polyol esters based on vegetable and animal fats
Preparation of polyol esters based on vegetable and animal fats
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DOI：
10.1016/s0960-8524(02)00203-1
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发表时间：
2003-03-01
影响因子：
11.4
通讯作者：
Gryglewicz, G
中科院分区：
文献类型：
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作者：
Gryglewicz, S;Piechocki, W;Gryglewicz, G
报道了以菜籽油、橄榄油和猪油等天然油脂为原料合成新戊二醇酯和三羟甲基丙烷酯的可能性。最终产品的合成是通过脂肪酸甲酯的醇解进行的，所述脂肪酸甲酯从所研究的天然脂肪中获得，与适当的多元醇一起使用甲醇钙作为催化剂。合成的NPG和TMP酯的基本物理化学性质如下：在40 ℃下的粘度在13.5-37.6 cSt的范围内，倾点在-10.5 ℃和-17.5 ℃之间，以及非常高的粘度指数，高于200。通常，新戊醇的酯的特征在于与天然甘油三酯相比在热氧化条件下具有更高的稳定性。由于多不饱和酸含量低，橄榄油基酯显示出最高的耐热氧化性。此外，猪油脂肪酸甲酯是合成润滑油的良好原料，只要其饱和酸含量降低。这使得NPG和TMP酯的合成具有比天然猪油（+33 ℃）更低的倾点（低于-10 ℃）。(C)2002爱思唯尔科技有限公司版权所有。
The possibility of using some natural fats: rapeseed oil, olive oil and lard, as starting material for the preparation of neopentyl glycol (NPG) and trimethylol propane (TMP) esters is reported. The syntheses of final products were performed by alcoholysis of fatty acid methyl esters, obtained from natural fats studied, with the appropriate polyhydric alcohol using calcium methoxide as a catalyst. The basic physicochemical properties of the NPG and TMP esters synthesized were the following: viscosity at 40 degreesC in the range of 13.5-37.6 cSt, pour point between -10.5 and -17.5degreesC and very high viscosity indices, higher than 200. Generally, the esters of neopentyl alcohols were characterized by higher stability in thermo-oxidative conditions in-comparison to native triglycerides. Due to the low content of polyunsaturated acids, the olive oil based esters showed the highest thermo-oxidative resistance. Also, methyl esters of fatty acids of lard would constitute a good raw material for the synthesis of lubricating oils, provided that their saturated acids content was lowered. This permits synthesis of NPG and TMP esters with a lower pour point (below -10 degreesC) than natural lard (+33 degreesC). (C) 2002 Elsevier Science Ltd. All rights reserved.