Purification and rectification process of sulfur tetrafluoride

Abstract

The invention discloses a purification and rectification process of sulfur tetrafluoride. The preparation process of sulfur hexafluoride is controlled through inductance elements. The process is carried out by using the following devices: a weighing device, a containing box, a quantitative valve, a sulfur tetrafluoride reactor, a stirrer, temperature sensors, a pressure sensor, an air pump, a cooler, a condensation catcher and a rectification tower. The process comprises the following operation steps: proportioning raw materials, preparing sulfur tetrafluoride, cooling crude gas, purifying thecrude gas and rectifying sulfur tetrafluoride. According to the invention, the condensation temperatures of the temperature control cooler and the condensation catcher are measured by the temperaturesensors, so that preparation of the sulfur tetrafluoride product is facilitated; and pressure in the sulfur tetrafluoride reactor is measured through the pressure sensor, so that scientific export ofthe crude gas is facilitated. The electric appliance elements used in the process do not need manual operation, the effect of full-automatic operation is achieved, the error of preparing the sulfur tetrafluoride product is reduced, purification precision is improved, and the purification precision is improved by 37% compared with purification precision of manual operation.

Description

technical field [0001] The invention relates to the technical field of sulfur tetrafluoride production, in particular to a process for purifying and rectifying sulfur tetrafluoride. Background technique [0002] Sulfur tetrafluoride SF4 is the most effective and widely used selective organic fluorinating agent. It can selectively fluorinate carbonyl and hydroxyl groups. It has an irreplaceable position in the production of fine chemicals, liquid crystal materials and high-end pharmaceutical industries. [0003] In the sulfur tetrafluoride production process, the pressure and temperature control of the sulfur tetrafluoride reaction synthesis process directly affect the progress of the synthesis reaction and the quality of the sulfur tetrafluoride crude gas; in the process of purifying the sulfur tetrafluoride crude gas, The temperature and pressure control of the condensing unit will affect the purification of sulfur tetrafluoride crude gas, and the control and treatment of t...

AI Technical Summary

Problems solved by technology

[0004] However, the existing sulfur tetrafluoride is manually controlled by mistake, and it cannot be accurately controlled quickly according to the environment during preparation, which reduces the accuracy of sulfur tetrafluoride preparation and makes the prepared sulfur tetrafluoride less precise.