湿法磷酸生产磷酸二氢钾杂质净化率研究

Study on purification in manufacturing potassium dihydrogen phosphate from wet-process phosphoric acid purified by crystallization of melamine phosphate

采用批量实验研究了结晶法净化湿法磷酸与氯化钾复分解反应生产磷酸二氢钾新工艺各阶段杂质的净化率。结果表明 :该工艺不同阶段对杂质有不同脱除效果 ,利用该工艺生产的磷酸二氢钾能够达到HG2 32

The purification of manufacturing potassium dihydrogen phosphate (KH 2PO 4) by double decomposition with potassium chloride and wet process phosphoric acid purified by means of recycled melamine (C 3N 6H 6) were studied.The experimental results showed that the ratio of purification was different from stage to stage.The qualities of product KH 2PO 4 met the terms of code HG2321-92.