一种三氟化磷的制备方法
By using a chromium catalyst and a secondary cold trap for collection in the preparation of phosphorus trifluoride, the problems of high energy consumption, significant environmental pollution, and low product purity in existing technologies have been solved, achieving efficient and low-cost preparation of phosphorus trifluoride.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN SHENGTANG GAS CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for preparing phosphorus trifluoride suffer from problems such as high energy consumption, significant environmental pollution, large equipment investment, severe equipment corrosion, and low product purity. Furthermore, reaction control is complex, and the drop in phosphorus trichloride liquid level leads to uneven reaction, affecting the smooth progress of production.
Phosphorus trichloride and anhydrous hydrogen fluoride were reacted at 25-45°C with a molar ratio of 1:(3.0-3.2), and a catalytic amount of chromium catalyst was added. Phosphorus trifluoride was collected through a secondary cold trap. The reaction pressure was 4.5-6.0 MPa. A special chromium catalyst was used to improve the reaction rate and stability.
It reduces equipment corrosion and energy consumption, simplifies the production process, increases the yield of phosphorus trifluoride to over 99%, avoids environmental pollution, and enables the preparation of high-purity products.
Smart Images
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