Phosphoric acid production involves a complex and carefully controlled process that begins with the utilization of phosphate rock as the primary raw material. The most common method employed in the industry is the wet process, which utilizes sulfuric acid to extract phosphoric acid from phosphate rock. This process begins with the digestion of phosphate rock in a mixture of sulfuric acid and water, resulting in the formation of phosphoric acid. The reaction is exothermic and requires careful temperature and pH control. The resulting phosphoric acid solution is then purified through filtration and other separation techniques to remove impurities, such as heavy metals and organic compounds. The purified phosphoric acid can be further concentrated or used directly in various applications across different industries.