Langyou Chemical
SUPPLEMENTS
Hypophosphoric Acid Preparation
Preparation of hypophosphoric acid
Inject an appropriate amount of water into the kettle, set it on fire and burn it. When the water temperature is suitable, take phosphate rock powder, pour it slowly into the kettle, and stir it with a long wooden rod to ensure uniformity. At this time, the fire should be stable, and the water temperature should not change suddenly.
Then, take an appropriate amount of sulfuric acid and slowly inject it along the wall of the kettle. Suddenly, the white foam in the kettle is surging, and the hot steam is evaporating. The operator should avoid its hot gas and quickly stir it with a wooden stick to make the phosphate rock powder and sulfuric acid fully blend. When appropriate, observe the reaction state. If the reaction is too severe, then the speed of sulfuric acid injection is slightly slowed; if the reaction is slow, the fire is slightly increased.
Wait for the reaction to rest, let the mixture in the kettle stand, and the precipitation gradually falls to the bottom of the kettle, and the upper layer is the clear liquid. Drainage with a thin tube, take the supernatant, and put it into another vessel. This clear liquid contains hypophosphoric acid.
However, this liquid is still miscellaneous and needs to be further refined. Put the obtained clear liquid into a distiller, steam slowly over low heat, so that the water vapor gradually dissipates and the concentration of hypophosphoric acid gradually increases. When steaming, strictly check the temperature, do not make it too high, so as not to decompose hypophosphoric acid.
Wait to steam until it is properly concentrated, stop the fire, take the cooled hypophosphoric acid liquid, filter it with filter paper, and remove its slight impurities. The resulting liquid is the refined In a clean bottle, seal it and store it for later use. Throughout the operation, be careful and follow the procedures. Do not be negligent and cause disaster.
Inject an appropriate amount of water into the kettle, set it on fire and burn it. When the water temperature is suitable, take phosphate rock powder, pour it slowly into the kettle, and stir it with a long wooden rod to ensure uniformity. At this time, the fire should be stable, and the water temperature should not change suddenly.
Then, take an appropriate amount of sulfuric acid and slowly inject it along the wall of the kettle. Suddenly, the white foam in the kettle is surging, and the hot steam is evaporating. The operator should avoid its hot gas and quickly stir it with a wooden stick to make the phosphate rock powder and sulfuric acid fully blend. When appropriate, observe the reaction state. If the reaction is too severe, then the speed of sulfuric acid injection is slightly slowed; if the reaction is slow, the fire is slightly increased.
Wait for the reaction to rest, let the mixture in the kettle stand, and the precipitation gradually falls to the bottom of the kettle, and the upper layer is the clear liquid. Drainage with a thin tube, take the supernatant, and put it into another vessel. This clear liquid contains hypophosphoric acid.
However, this liquid is still miscellaneous and needs to be further refined. Put the obtained clear liquid into a distiller, steam slowly over low heat, so that the water vapor gradually dissipates and the concentration of hypophosphoric acid gradually increases. When steaming, strictly check the temperature, do not make it too high, so as not to decompose hypophosphoric acid.
Wait to steam until it is properly concentrated, stop the fire, take the cooled hypophosphoric acid liquid, filter it with filter paper, and remove its slight impurities. The resulting liquid is the refined In a clean bottle, seal it and store it for later use. Throughout the operation, be careful and follow the procedures. Do not be negligent and cause disaster.
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