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Low-temperature hydrogen fluoride industrial test successfully
On March 2nd, the trial production of a hydrogen fluoride industrial testing device using a low-temperature method developed by Zhang Zhixin, a former senior engineer from the Nanchang Industrial Technology Research Institute, was successfully completed. The test facility, located at Nanchang New Chemical Technology Co., Ltd., produced two grades of hydrofluoric acid containing 40% and 55% fluorine, both of which met national quality standards. This breakthrough in low-temperature hydrogen fluoride technology offers a more energy-efficient, high-yield, and environmentally friendly alternative for hydrogen fluoride manufacturers.
Hydrogen fluoride is a crucial raw material in the fluorine chemical industry. China has over 50 production facilities with an annual capacity of 700,000 tons. Traditionally, these facilities use sulfuric acid and fluorite powder as feedstock, reacting them in a converter process. However, this method has several drawbacks. A portion of the fluorite powder becomes coated with calcium sulfate, preventing full contact with sulfuric acid and leading to incomplete reactions. The resulting waste, known as fluorogypsum, contains unreacted fluorite and gypsum, causing environmental concerns. Additionally, the high furnace temperatures—up to 500°C—can lead to sulfuric acid volatilization and the release of hydrogen fluoride gas, making downstream purification difficult. There are also risks of fluorinated hydrogen leakage, further contributing to pollution.
In response to these challenges, many companies have adopted foreign technologies in recent years. While this has improved single-furnace output, issues like incomplete reactions, high unit costs, unstable product quality, and severe equipment corrosion persist. Moreover, environmental pollution remains a major concern.
The newly developed low-temperature process still uses sulfuric acid and fluorite powder but introduces a different approach. Fluorite is first dissolved in a liquid medium that can slightly dissolve calcium fluoride. After stirring, sulfuric acid is added to initiate the reaction. The entire process takes place in the liquid phase under controlled heating, maintaining a temperature of around 90°C. This ensures a rapid and complete reaction without the formation of calcium sulfate coatings or the release of sulfuric acid vapors or fluorite dust into the hydrogen fluoride gas stream.
As a result, purified hydrogen fluoride can be directly obtained, significantly improving efficiency. Compared to traditional methods, the low-temperature process offers shorter production flow, lower energy consumption, reduced capital investment, no raw material waste, and minimal unit product consumption. It also effectively eliminates the discharge of "three wastes," delivering substantial economic and environmental benefits.
• Made of high clarity, 100% virgin polystyrene.
• Sterilized by E-beam, SAL=10-6.
• Non-Pyrogenic, DNase/Rnase free.
• Frosted writing and clear graduations.
• Notched bottom for slip free stacking.
• Clear lot number for batch traceability.
• Made of high clarity, 100% virgin polystyrene.
• Sterilized by E-beam, SAL=10^-6.
• Non-Pyrogenic, DNase/Rnase free.
• Growth area: 870 cm².
• Individually Packaged in sterile bag