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首页> 外文期刊>ACS Omega >High-Yield Production of Fatty Nitriles by One-Step Vapor-Phase Thermocatalysis of Triglycerides
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High-Yield Production of Fatty Nitriles by One-Step Vapor-Phase Thermocatalysis of Triglycerides

机译：一步气相热催化甘油三酸酯高产脂肪腈

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摘要

Fatty nitriles are widely used as intermediate molecules in the pharmaceutical and polymer industries. In addition, hydrogenation of fatty nitriles produces fatty amines that are common surfactants. In the conventional fatty nitrile process, triglycerides are first hydrolyzed and the resulting fatty acids are catalytically reacted with NH_(3) in a liquid-phase reaction. In this study, we report a simpler one-step fatty nitrile production method that involves a direct vapor-phase reaction of triglycerides with NH_(3) in the presence of heterogeneous solid acid catalysts. The reactions were performed in a tubular reactor maintained at 400 °C into which triglycerides were injected through an atomizer to allow rapid volatilization and reaction; NH_(3) was fed as a gas. Several metal oxide catalysts were tested, and reactions in the presence of V_(2)O_(5) resulted in near-theoretical fatty nitrile yields (84 wt % relative to the feed mass). In general, catalysts with higher acidity such as V_(2)O_(5), Fe_(2)O_(3), and ZnO showed higher fatty nitrile yields compared to low acidity catalysts such as ZrO, Al_(2)O_(3), and CuO. Energy balance calculations indicate that the one-step reaction described here would require significantly lower energy than the conventional process primarily because of the elimination of the energy-intense triglyceride hydrolysis.
机译：脂肪腈在制药和聚合物工业中广泛用作中间分子。另外，脂肪腈的氢化产生脂肪胺，其是常见的表面活性剂。在常规的脂肪腈方法中，首先将甘油三酸酯水解，然后将所得的脂肪酸在液相反应中与NH_（3）催化反应。在这项研究中，我们报告了一种更简单的一步式脂肪腈生产方法，该方法涉及在异质固体酸催化剂存在下甘油三酸酯与NH_（3）的直接气相反应。反应在保持在400℃的管式反应器中进行，通过雾化器将甘油三酸酯注入其中，以实现快速挥发和反应。 NH_（3）作为气体进料。测试了几种金属氧化物催化剂，并且在V_（2）O_（5）存在下的反应导致了理论上接近的脂肪腈收率（相对于进料质量为84 wt％）。通常，与低酸度的催化剂（如ZrO，Al_（2）O_（3）等相比，酸度较高的催化剂（例如V_（2）O_（5），Fe_（2）O_（3）和ZnO）具有更高的脂肪腈收率。 ）和CuO。能量平衡计算表明，此处所述的一步反应所需的能量比常规方法要低得多，这主要是因为消除了能量密集的甘油三酸酯水解。

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