Apparatus and method for purifying high-purity phosphorus trifluoride
The described method and apparatus address the safety and purity challenges of phosphorus trifluoride production by using a reactor and freezing units to remove impurities, achieving high-purity phosphorus trifluoride with enhanced reaction rates and economic efficiency.
WO2026134664A1 Publication Date: 2026-06-25POHANG IRON & STEEL CO LTD +1
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Patent Information
- Application Number
- PCT/KR2025/018217
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-12-16
- Filing Date
- 2025-11-06
- Publication Date
- 2026-06-25
AI Technical Summary
Technical Problem
Conventional methods for producing high-purity phosphorus trifluoride face challenges in ensuring process safety and increasing purity while replacing hydrogen fluoride as a reactant, as they struggle with violent reactions, acidic byproducts, and low reaction rates.
Method used
A method and apparatus that utilize a phosphorus chloride compound and a metal fluoride salt in a reactor, followed by freezing units and an adsorption unit to remove impurities, including hydrogen chloride, using a catalyst to enhance reaction efficiency and achieve high purity.
Benefits of technology
The method and apparatus increase the purity and yield of phosphorus trifluoride, suppress the generation of harmful byproducts, and enhance economic efficiency by improving reaction rates.
✦ Generated by Eureka AI based on patent content.
Abstract
An apparatus for purifying high-purity phosphorus trifluoride according to one embodiment of the present invention comprises: a phosphorus trifluoride production unit including a reactor in which a phosphorus chloride compound solution and a metal fluoride salt react, and a purge device for vacuum-purging the reactor; a first freezing unit for cooling a phosphorus trifluoride mixed gas obtained from the phosphorus trifluoride production unit to remove unreacted materials contained in the phosphorus trifluoride mixed gas; and a second freezing unit for cooling the phosphorus trifluoride mixed gas obtained from the first freezing unit with liquid nitrogen to remove purge gas and hydrogen chloride (HCl).
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