Continuous automatic production method of phosphorus pentafluoride

Abstract

The invention provides a continuous automatic production method of phosphorus pentafluoride, which comprises the following steps: opening a second pipeline to fill inert gas into part of weighing and conveying bins, opening a corresponding exhaust port to remove part of residual air and steam in the weighing and conveying bins, and closing the second pipeline and the exhaust port; feeding valves and weighing and conveying units corresponding to part of weighing and conveying bins are opened to weigh phosphorus pentachloride and then feed phosphorus pentachloride, and meanwhile, a hydrogen fluoride supply tank is opened to feed anhydrous HF into corresponding part of reactors for reaction; before reaction of part of the reactors is finished, the second pipeline is opened at the same time, inert gas is filled into the remaining weighing and conveying bins, the corresponding exhaust ports are opened to remove residual air and steam in the remaining weighing and conveying bins for standby application, and the second pipeline and the exhaust ports are closed; feeding valves and weighing conveying units corresponding to the remaining weighing conveying bins are opened to weigh phosphorus pentachloride and then feed phosphorus pentachloride, and meanwhile, a hydrogen fluoride supply tank is opened to feed anhydrous HF into the remaining reactors for reaction.

Description

technical field [0001] The invention relates to a continuous automatic production method of phosphorus pentafluoride. Background technique [0002] Phosphorus pentafluoride (chemical formula: PF 5 ) is an important inorganic compound that can be used in electronic industry, polymer materials and organic synthesis catalysts. Entering the new century, high-performance lithium-ion batteries have increasingly become an important area for the development of the new energy industry. Lithium hexafluorophosphate, a key raw material for the production of lithium-ion batteries, has higher and higher quality requirements. How to efficiently produce high-quality phosphorus pentafluoride is important for lithium hexafluorophosphate. synthesis is very important. At present, one of the methods for industrial production of phosphorus pentafluoride is to generate it by reacting phosphorus pentachloride and hydrogen fluoride gas. Phosphorus pentachloride is a light yellow crystalline powde...

AI Technical Summary

Problems solved by technology

[0004] Phosphorus pentachloride in the traditional preparation process of phosphorus pentafluoride is manually fed, and its labor intensity is relatively large. The total amount of phosphorus pentachloride used in the overall process is large, and the consumption of a single reaction equipment is small, so multiple generating devices are required Multiple feeding and reactions will affect the efficiency. More importantly, the feeding process cannot avoid contact with the air, which will produce toxic and corrosive gases, which will have a direct impact on the health of production personnel, the life of production equipment, and environmental pollution.

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