Liquid ammonia purification issues in stripping units
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Dear experts, is there any method to purify the liquid ammonia produced by single-tower pressurized stripping, so that its ammonia content is ≥99.8%, the residue content is ≤0.2%, and the oil content is ≤50 mg/kg, enabling it to be used as a chemical raw material in certain chemical plants? Additionally, what are the impurities that are particularly difficult to remove?
There are many methods; it mainly depends on the components obtained through distillation, as well as the cost