After the best experimental conditi

在确定用于一步生产乙酯的最佳实验条件后，将相应的乙酯在30°C下进行第二个乙醇化阶段60分钟。在这种情况下，遵循两种不同的实验程序。在第一个步骤中，在通过水洗纯化乙酯后进行第二个乙醇化阶段，而在第二个步骤中，用2 wt％的Magnesol®在65°C下连续处理20分钟来代替水洗搅拌，然后过滤以从悬浮液中完全除去吸附剂。在这两种情况下，第二乙醇水解阶段均使用50％的无水乙醇和50％的催化剂浓度在第一乙醇水解阶段中较早进行。<br>在第二个乙醇化阶段结束时，通过在50-60°C的低压下蒸发再次回收乙醇，分离出乙酯并在80°C的水中彻底洗涤。该步骤产生澄清的浅黄色液相，将其用无水硫酸钠脱水并过滤，然后再使用。

After the best experimental conditions were identified for the production of ethyl esters in one single stage, the corresponding ethyl esters were subjected to a second ethanolysis stage at 30 °C for 60 min. In this case, two different experimental procedures were followed. In the first procedure, the second ethanolysis stage was carried out after the ethyl esters were purified by water washing, whereas in the second procedure, water washing was replaced by a treatment with 2 wt% Magnesol® at 65 °C for 20 min with continuous stirring, followed by filtration to completely remove the adsorbent from suspension. In both cases, the second ethanolysis stage was carried out using 50% of the anhydrous ethanol and 50% of the catalyst concentration applied earlier in the first ethanolysis stage.<br>At the end of the second ethanolysis stage, the ethanol was recovered once again by evaporation at 50–60 °C under low pressure and the ethyl esters were separated and washed thoroughly with water at 80 °C. This procedure yielded a clear, light yellow liquid phase that was dehydrated with anhydrous sodium sulfate and filtered before any further use.

在确定了在一个单一阶段中生产乙酯的最佳实验条件后，将相应的乙酯在30℃下进行第二次乙醇分解60分钟。在这种情况下，遵循两种不同的实验程序。在第一个步骤中，第二个乙醇分解阶段是在用水洗法纯化乙酯之后进行的，而在第二个步骤中，用水清洗替换为在65°C下用2 wt%Magnesol®处理20分钟，持续搅拌，然后过滤，以从悬浮液中完全去除吸附剂。在这两种情况下，使用50%的无水乙醇和50%的催化剂浓度在第一个乙醇溶解阶段进行第二个乙醇溶解阶段。<br>在第二个乙醇分解阶段结束时，在50–60°C的低压下通过蒸发再次回收乙醇，并在80°C的温度下分离和用水彻底清洗乙酯。此过程产生一个透明的浅黄色液相，用无水硫酸钠脱水并在任何进一步操作之前过滤使用。