How to distinguish between ammonium hydrogen fluoride and ammonium fluoride
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Ammonium fluoride decomposes easily to form ammonium hydrogen fluoride. The production process of ammonium fluoride generally involves first producing ammonium fluoride, and then introducing hydrogen fluoride to it in order to obtain ammonium hydrogen fluoride; if not controlled properly, a mixture of ammonium fluoride and ammonium hydrogen fluoride will be formed. By comparing the standards of the two substances, it was found that the analytical methods are the same; only the calculation formulas differ. How can one determine whether it is ammonium fluoride or ammonium hydrogen fluoride, or what proportion each of them constitutes? How can control be exercised to achieve a higher purity of ammonium fluoride?
Ammonium hydrogen fluoride 【Chinese name】Ammonium hydrogen fluoride； Ammonium bifluoride 【English name】ammonium bifluoride; ammonium acid fluoride 【Structural or molecular formula】 NH4HF2 【Density】1.50 【Melting point (°C)] 125.6 【Boiling point (°C)] 240 【Properties】 White or colorless transparent crystals of the rhombohedral system, with a slight acidic taste. Toxic! 【Solubility】 Slightly soluble in alcohol, highly soluble in cold water; decomposes in hot water. The aqueous solution is strongly acidic. 【Uses】 It can corrode glass and is corrosive to skin. It can be used as a chemical reagent, a glass etchant (used in combination with hydrofluoric acid), a disinfectant and preservative in the fermentation industry, a solvent for producing metallic beryllium from beryllium oxide, and a surface treatment agent for silicon steel sheets. It is also used in the manufacture of ceramics and magnesium alloys, as well as for cleaning and descaling boiler feedwater systems and steam generation systems. Additionally, it is employed for the acid treatment of sand and gravel in oil fields, and serves as a component in catalysts for alkylation and isomerization processes. 【Preparation or Source】 It is obtained by the neutralization of anhydrous hydrofluoric acid with liquid ammonia. Based on your description, I personally think that in terms of process control during production, it is necessary to control the residual amount of hydrogen fluoride. As long as the time and the quantity of hydrogen fluoride are well controlled during the reaction, this can be ensured. I suggest you upload the parameters used in your control system so that everyone can exchange ideas and learn from them. This post was last edited by limingshuguang on 2009-3-3 at 15:38
I’m also just conducting tests in the laboratory; there are no key performance indicators. If anyone knows a method for producing ammonium fluoride from ammonium fluoride, could you share it with me? liziyan76@126.com
It’s simple. I’m asking if you can test solutions of sodium carbonate and sodium bicarbonate? It’s simple, right? It’s the same principle
Are there any suppliers of ammonium fluoride? You can contact me, thank you! 18857366032
I want to know too! QQ750565339
The reaction conditions for ammonia fluoride and ammonium hydrogen fluoride are different; this was studied 20 years ago.