In the production of nitrophosphates by the mixed acid process the main components of the acidulation tail gas are nitrogen oxides, and the steam condensate from evaporation contains ammonia.

• 摘要混酸法硝酸磷肥酸解尾气的主要成分是氮氧化物，其浓缩过程产生的蒸汽冷凝液含有氨。