In vacuum distillation processes, pressure drop per unit of theoretical plate $(\text{Δ}\text{p})$ is an important parameter because overall pressure drop of distillation column must be lower than one atmosphere $(0<\Delta \text{P}<1\text{a}\text{t}\text{m}.)$. Besides, in hard distillation processes having small relative volatility coefficient $(1<{\text{α}}_{\text{i}}<1.1)$, minimum number of theoretical plates per unit length $({\text{n}}_{\text{m}\text{i}\text{n}})$ is another important parameter as total height of distillation column cannot exceed the maximum of technologically attainable height. Moreover, by increasing total height of the column its thermal control will be extremely hard. In this work, an efficient structured packing for hard vacuum distillation processes has been fabricated and also calibrated using the binary mixture of Carbon tetrachloride-Benzene, with very low relative volatility coefficient $(1.128<{\text{α}}_{\text{i}}<1.142)$. In hard vacuum distillation processes both parameters, $\text{Δ}\text{p}$ and ${\text{n}}_{\text{m}\text{i}\text{n}}$, are important. Therefore, the effects of three main variables including reflux volumetric flow rate, the number of distributors within the packed-bed and average height of each element of the structured packing on these parameters have been studied. The best amounts of $\text{Δ}\text{p}$ and ${\text{n}}_{\text{m}\text{i}\text{n}}$ found to be 1.394 mmHg/tray and 14.2175 tray/m respectively. This vividly indicates that the newly introduced structured packing is appropriate for hard vacuum distillation processes.

在真空蒸馏过程中，每单位理论塔板的压降 $（\text{Δ}\text{p}）$ 是重要的参数，因为蒸馏塔的总压降必须低于一个大气压 $（0<\Delta \text{P}<\mathrm{1个}\text{一种}\text{Ť}\text{米}。）$。此外，在相对挥发系数小的硬蒸馏工艺中$（\mathrm{1个}<{\text{α}}_{\text{一世}}<1.1）$，每单位长度的最小理论塔板数 $（{\text{ñ}}_{\text{米}\text{一世}\text{ñ}}）$这是另一个重要参数，因为蒸馏塔的总高度不能超过技术上可达到的高度的最大值。而且，通过增加塔的总高度，其热控制将变得非常困难。在这项工作中，已经制造出用于硬真空蒸馏过程的有效规整填料，并且还使用四氯化碳-苯的二元混合物进行了校准，该混合物的相对挥发系数非常低$（1.128<{\text{α}}_{\text{一世}}<1.142）$。在硬真空蒸馏过程中，这两个参数$\text{Δ}\text{p}$ 和 ${\text{ñ}}_{\text{米}\text{一世}\text{ñ}}$， 是重要的。因此，研究了三个主要变量，包括回流体积流量，填料床内分配器的数量以及规整填料每个元素的平均高度对这些参数的影响。最好的$\text{Δ}\text{p}$ 和 ${\text{ñ}}_{\text{米}\text{一世}\text{ñ}}$分别为1.394 mmHg /托盘和14.2175托盘/ m。这生动地表明，新引入的规整填料适用于硬真空蒸馏工艺。