Method for purifying 22% industrial-grade ammonia water into reagent-grade ammonia water!
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Tap water absorbs ammonia to produce 20% industrial-grade ammonia solution; the key to purifying it into reagent-grade ammonia lies in how to remove metal ions from the crude ammonia solution! !
Installing a set of distillation units can solve the problem mentioned by the poster. The principle of this process is as follows: The temperature of the dilute ammonia solution is increased using a reboiler, which causes ammonia vapor to be released. After mass and heat transfer take place in the distillation tower, highly pure gaseous ammonia is obtained, which is then condensed into liquid ammonia of reagent grade by a top condenser at the top of the tower.
Original poster, the ammonia solution we had initially contained metal impurities; how did you remove them? Thank you
It is sufficient to directly use liquid ammonia after vaporization, and then dilute it with deionized water in stainless steel equipment