Advanced production process for potassium dihydrogen phosphate
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Friends, I urgently need to find out what is the commonly used, relatively advanced, and low-cost manufacturing process for potassium dihydrogen phosphate at present.
The direct method involves treating potassium chloride phosphate ore with sulfuric acid directly; it features low raw material costs and high quality of the final product. This technology was first developed by an Israeli company. Currently, there are mainly two processes used in China for producing potassium dihydrogen phosphate: the neutralization method, which involves the use of potassium hydroxide and phosphoric acid for neutralization; this method yields high-quality product, but the cost of raw materials is high ； Double displacement method: The double displacement of potassium chloride and monoammonium compounds results in low raw material costs, but the quality of the product is not satisfactory.
The technology behind potassium dihydrogen phosphate remains confidential and is not easy to disclose; it basically involves chemical reactions, precipitation of solids, sequential washing, removal of impurities, and drying to produce the final product.
Double displacement method: potassium chloride and monoammonium salts are used in a double displacement reaction, resulting in low raw material costs
For the potassium hydroxide neutralization method, the main component content is >99.9%; for the potassium chloride double-displacement method, it is >98%. The price difference in the market is over 1,000 yuan
Is there any introduction to a process that uses KCI as a raw material and phosphoric acid for extraction?