| 摘要 |
A process for producing a potassium polyphosphate fertilizer solution wherein the available amount of phosphoric anhydride is totally water soluble and is, therefore, suitable for the manufacture of liquid fertilizers. Concentrated wet-process phosphoric acid containing polyphosphoric acids is reacted with potassium chloride at a reaction temperature of 150 DEG -500 DEG C. in the presence of a dehydrochlorination catalyst. Hydrogen chloride is vaporized from the reaction melt and the melt is quenched in aqueous alkaline solution to produce the potassium polyphosphate fertilizer solution.
|
