Production of anhydrous disodium hydrogen phosphate
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The anhydrous disodium hydrogen phosphate that we produce is synthesized from phosphoric acid and sodium hydroxide, after which the mixture is filtered and then concentrated to yield crystals. However, these crystals tend to clump together easily; sometimes clumping occurs even within the concentration vessel. We have tried leaving more mother liquor during the concentration process, which does help a bit, but the crystals obtained through centrifugation end up absorbing more water and the yield decreases as a result. I was wondering if any experts have better methods that I could learn from.....
For such inorganic salt crystals, it is recommended to use continuous evaporation concentration crystallization technology, with an appropriate solid content controlled to enable continuous discharge. This not only helps to maintain product quality but also yields significant benefits in terms of energy savings and reduced consumption.
The poster shouldn’t focus only on the yield of a single crystallization process; the mother liquor can be reused after all. The endpoint of concentration is crucial for crystallization, as it affects the crystal structure and the size of the crystal particles, which in turn influences the subsequent separation steps. It is necessary to determine the impact of slurry specific gravity on crystallization through repeated experiments and take all factors into consideration. It depends on whether you want quantity or quality
This post was last edited by Yu Qin on 2019-7-31 20:18: German Memsys low-temperature non-metallic membrane distillation technology 1